{"id":23408,"date":"2017-05-19T15:40:33","date_gmt":"2017-05-19T06:40:33","guid":{"rendered":"http:\/\/www.sejuku.net\/blog\/?p=23408"},"modified":"2024-05-06T11:42:33","modified_gmt":"2024-05-06T02:42:33","slug":"%e8%a6%9a%e3%81%88%e3%81%a6%e3%81%8a%e3%81%8d%e3%81%9f%e3%81%84%ef%bc%81javascript%e3%81%ae%e6%95%b0%e5%80%a4%e5%9e%8b%e3%81%ae6%e3%81%aetips","status":"publish","type":"post","link":"https:\/\/www.sejuku.net\/blog\/23408","title":{"rendered":"JavaScript\u3067Number\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f7f\u3044\u65b9(\u30d7\u30ed\u30d1\u30c6\u30a3\u3001\u30e1\u30bd\u30c3\u30c9\u4e00\u89a7)"},"content":{"rendered":"

\u3053\u3093\u306b\u3061\u306f\uff01Web\u30b3\u30fc\u30c0\u30fc\u30fb\u30d7\u30ed\u30b0\u30e9\u30de\u30fc\u306e\u8c9d\u539f\uff08@touhicomu<\/a>\uff09\u3067\u3059\u3002<\/p>\n

\u4eca\u65e5\u306f\u3001JavaScript\u3067\u6570\u5024\u3092\u6271\u3046\u305f\u3081\u306eNumber\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/strong><\/span>\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n

\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001<\/p>\n

\u30fb\u305d\u3082\u305d\u3082\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u306f\uff1f
\n\u30fb\u300cNumber\u300d\u3068\u306f\uff1f
\n\u30fb\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9
\n\u30fb\u300cNumber\u300d\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u3064\u3044\u3066
\n\u30fb\u300cNumber\u300d\u30e1\u30bd\u30c3\u30c9\u306b\u3064\u3044\u3066
\n<\/strong><\/span>
\n\u3068\u3044\u3046\u57fa\u672c\u7684\u306a\u5185\u5bb9\u304b\u3089\u3001<\/p>\n

\u30fb\u6587\u5b57\u5217\u21d4\u6570\u5024\u306e\u76f8\u4e92\u5909\u63db\u306b\u3064\u3044\u3066
\n\u30fb\u6570\u5024\u578b\u306e\u6841\u533a\u5207\u308a\u3068\u6841\u6570\u306b\u3064\u3044\u3066
\n\u30fb\u6570\u5024\u578b\u306e\u578b\u306b\u3064\u3044\u3066
\n<\/strong><\/span>
\n\u306a\u3069\u306e\u5fdc\u7528\u7684\u306a\u4f7f\u3044\u65b9\u306b\u95a2\u3057\u3066\u3082\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n

\u3053\u306e\u8a18\u4e8b\u3067\u3001\u300cNumber\u300d\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u3057\u3063\u304b\u308a\u5b66\u7fd2\u3057\u3066\u81ea\u5206\u306e\u30b9\u30ad\u30eb\u30a2\u30c3\u30d7\u3092\u76ee\u6307\u3057\u307e\u3057\u3087\u3046\uff01<\/p>\n

\u305d\u3082\u305d\u3082\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u306f\uff1f<\/h2>\n

JavaScript \u306f\u3001\u30b7\u30f3\u30d7\u30eb\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30d9\u30fc\u30b9\u306e\u67a0\u7d44\u307f<\/strong><\/span>\u3092\u6301\u3064\u8a00\u8a9e\u3068\u3057\u3066\u8a2d\u8a08\u3055\u308c\u3066\u3044\u307e\u3059\u3002 <\/p>\n

\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/strong><\/span>\u306f\u4e00\u8a00\u3067\u3044\u3046\u3068\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u96c6\u307e\u308a<\/strong><\/span>\u3067\u3059\u3002<\/p>\n

\u30d7\u30ed\u30d1\u30c6\u30a3<\/strong><\/span>\u306f\u540d\u524d(\u3082\u3057\u304f\u306f\u30ad\u30fc)\u3068\u5024\u3068\u306e\u30bb\u30c3\u30c8<\/strong><\/span>\u3067\u3059\u3002<\/p>\n

\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u5024\u3092\u95a2\u6570<\/strong><\/span>\u306b\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u3001\u3053\u308c\u304c\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30e1\u30bd\u30c3\u30c9<\/strong><\/span>\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u30d6\u30e9\u30a6\u30b6\u3067\u306f\u3042\u3089\u304b\u3058\u3081\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u3044\u304f\u3064\u304b\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u3082\u3061\u308d\u3093\u72ec\u81ea\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u3053\u306e\u8a18\u4e8b\u3067\u89e3\u8aac\u3059\u308b\u300cNumber\u300d\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3082\u3042\u3089\u304b\u3058\u3081\u5b9a\u7fa9\u3055\u308c\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u7fa4\u306e\u4e2d\u306e\u3072\u3068\u3064\u3067\u3001\u69d8\u3005\u306a\u30d7\u30ed\u30d1\u30c6\u30a3\u3068\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u300cNumber\u300d\u3068\u306f\uff1f<\/h2>\n

\u305d\u308c\u3067\u306f\u3001\u307e\u305a\u6700\u521d\u306b\u300cNumber\u300d\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/strong><\/span>\u306e\u57fa\u672c\u7684\u306a\u77e5\u8b58\u304b\u3089\u5b66\u3093\u3067\u3044\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n

\u300cNumber\u300d\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001JavaScript\u3067\u6271\u3046\u300c\u6570\u5024\u300d\u306e\u6574\u5f62\u3084\u5b9a\u6570\u306a\u3069\u3092\u5229\u7528\u3059\u308b\u305f\u3081<\/strong><\/span>\u306b\u4f7f\u3046\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002<\/p>\n

\u4e3b\u306b\u3001\u300c\u30d7\u30ed\u30d1\u30c6\u30a3\u300d<\/strong><\/span>\u3068\u300c\u30e1\u30bd\u30c3\u30c9\u300d<\/strong><\/span>\u306e2\u3064\u306b\u5206\u304b\u308c\u3066\u3044\u308b\u306e\u306f\u4e00\u822c\u7684\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u540c\u3058\u3067\u3059\u3002<\/p>\n

\u300cNumber\u300d\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6d3b\u7528\u3059\u308c\u3070\u3001\u5024\u304c\u6570\u5024\u3067\u3042\u308b\u304b\u3092\u691c\u8a3c<\/strong><\/span>\u3057\u305f\u308a\u6587\u5b57\u5217\u3092\u6570\u5024\u306b\u5909\u63db\u3059\u308b<\/strong><\/span>\u306a\u3069\u591a\u5f69\u306a\u3053\u3068\u304c\u5b9f\u73fe\u3067\u304d\u308b\u306e\u3067\u3059\uff01<\/p>\n

\u672c\u8a18\u4e8b\u3067\u306f\u3001\u300cNumber\u300d\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u57fa\u672c\u304b\u3089\u5fdc\u7528\u6280\u307e\u3067\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u306e\u3067\u3001\u305c\u3072\u53c2\u8003\u306b\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n

\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h3>\n

\u3053\u3053\u304b\u3089\u306f\u3001\u300cNumber\u300d\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/strong><\/span>\u3092\u4f7f\u3063\u305f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u624b\u6cd5\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n

\u6700\u3082\u57fa\u672c\u7684\u306a\u300cNumber\u300d\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f7f\u3044\u65b9\u3068\u3057\u3066\u306f\u3001\u6587\u5b57\u5217\u3084\u65e5\u4ed8\u306a\u3069\u3055\u307e\u3056\u307e\u306a\u5024\u3092\u300c\u6570\u5024\u300d\u306b\u5909\u63db\u3059\u308b<\/strong><\/span>\u3068\u3044\u3046\u7528\u9014\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u8a18\u8ff0\u65b9\u6cd5\u306f\u3001\u3010 Number( \u5024 ) \u3011<\/strong><\/span>\u306e\u3088\u3046\u306b\u6570\u5024\u306b\u5909\u63db\u3057\u305f\u3044\u300c\u5024\u300d\u3092\u5f15\u6570\u306b\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n

\u6b21\u306e\u30b5\u30f3\u30d7\u30eb\u4f8b\u3092\u898b\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n

\/\/\u2460 \u6570\u5024\r\nconsole.log( '\u24601234= ' + Number(1234) );\r\n\r\n\/\/\u2461 \u6587\u5b57\u5217\r\nconsole.log( '\u2461hello= ' + Number('1234') );\r\n\r\n\/\/\u2462 \u65e5\u4ed8\r\nconsole.log( '\u2462date()= ' + Number(new Date()) );\r\n\r\n\/\/\u2463 16\u9032\u6570\r\nconsole.log( '\u24630xffff= ' + Number('0xffff') );<\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/strong><\/span><\/p>\n
\u24601234= 1234\r\n\u24611234= 1234\r\n\u2462date()= 1512968940019\r\n\u24630xffff= 65535<\/pre>\n
\u3053\u306e\u4f8b\u3067\u306f\u3001\u300c\u2460\u6570\u5024 \/ \u2461\u6587\u5b57\u5217 \/ \u2462\u65e5\u4ed8 \/ \u246316\u9032\u6570\u300d<\/strong><\/span>\u3068\u3044\u3046\u5024\u3092\u305d\u308c\u305e\u308c\u5f15\u6570\u306b\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u2460\u306f\u305d\u306e\u307e\u307e\u6570\u5024\u306a\u306e\u3067\u3001\u7d50\u679c\u3082\u6570\u5024<\/strong><\/span>\u306b\u306a\u308a\u307e\u3059\u306d\u3002<\/p>\n
\u2461\u306f\u6587\u5b57\u5217\u578b\u306e\u6570\u5024\u306a\u306e\u3067\u3059\u304c\u81ea\u52d5\u7684\u306b\u6570\u5024\u306b\u5909\u63db\u3055\u308c\u307e\u3059\u3002<\/strong><\/span>\uff08\u305f\u3060\u3057\u300chello\u300d\u306a\u3069\u666e\u901a\u306e\u6587\u5b57\u5217\u306f\u5909\u63db\u3055\u308c\u307e\u305b\u3093\uff09<\/p>\n
\u2462\u306f\u65e5\u4ed8\u30c7\u30fc\u30bf\u3067\u3059\u304c\u3001Number\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u81ea\u52d5\u7684\u306b\u300c\u7d4c\u904e\u30df\u30ea\u79d2\u300d<\/strong><\/span>\u306b\u63db\u7b97\u3057\u305f\u6570\u5024\u3092\u8fd4\u3057\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n
\u2463\u306f16\u9032\u6570<\/strong><\/span>\u3068\u3044\u3046\u7279\u6b8a\u306a\u5024\u3067\u3059\u304c\u3001\u4e00\u822c\u7684\u306a\u6570\u5024\u578b(10\u9032\u6570)<\/strong><\/span>\u306b\u5909\u63db\u3057\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n
\u3053\u306e\u3088\u3046\u306b\u3001Number\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u5229\u7528\u3059\u308b\u3068\u3055\u307e\u3056\u307e\u306a\u5024\u3092\u300c\u6570\u5024\u300d<\/strong><\/span>\u306b\u3057\u3066\u304b\u3089\u51e6\u7406\u3092\u884c\u3048\u308b\u306e\u3067\u4fbf\u5229\u3067\u3059\u306d\u3002<\/p>\n
\u3061\u306a\u307f\u306b\u3067\u3059\u304c\u3001\u300cNumber\u300d\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u3044\u3046\u3053\u3068\u3082\u3042\u308a\u300cnew\u300d<\/strong><\/span>\u3092\u4f7f\u3063\u3066\u6570\u5024\u3092\u4f5c\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u304c\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n
var num1 = new Number(10);\r\nvar num2 = 10;\r\n\r\nconsole.log( typeof num1 );\r\nconsole.log( num1 === num2 );<\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/strong><\/span><\/p>\n
object\r\nfalse<\/pre>\n
\u300cnew\u300d\u3092\u4f7f\u3063\u3066\u4f5c\u6210\u3057\u305f\u6570\u5024\u3092\u300cnum1\u300d\u306b\u4ee3\u5165\u3057\u3001\u666e\u901a\u306e\u6570\u5024\u30c7\u30fc\u30bf(\u30ea\u30c6\u30e9\u30eb)\u3092\u300cnum2\u300d\u306b\u4ee3\u5165\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u300ctypeof\u300d<\/strong><\/span>\u3067\u578b\u3092\u898b\u3066\u307f\u308b\u3068\u300cobject\u300d\u306b\u306a\u3063\u3066\u3044\u308b<\/strong><\/span>\u306e\u304c\u5206\u304b\u308a\u307e\u3059\u306d\u3002<\/p>\n
\u3064\u307e\u308a\u3001\u300cnew\u300d\u3092\u4f7f\u3046\u3068\u6570\u5024\u578b\u3067\u306f\u306a\u304f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578b\u306b\u306a\u308b\u305f\u3081\u300cnum1 \/  num2\u300d\u306f\u305d\u308c\u305e\u308c\u5225\u306e\u5024<\/strong><\/span>\u3068\u3044\u3046\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u300c\u578b\u300d\u3092\u6c17\u306b\u3057\u306a\u3044\u3067\u300cnum1 == num2\u300d<\/strong><\/span>\u3068\u6bd4\u8f03\u3059\u308c\u3070\u300ctrue\u300d\u306b\u306a\u308b\u306e\u3067\u3059\u304c\u3001\u57fa\u672c\u7684\u306b\u3053\u306e\u65b9\u6cd5\u306f\u3042\u307e\u308a\u4f7f\u308f\u308c\u307e\u305b\u3093\u3002<\/p>\n
\u305d\u306e\u305f\u3081\u3001\u300cnew\u300d\u3092\u4f7f\u3063\u305fNumber\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f7f\u3044\u65b9\u306f\u7406\u7531\u304c\u306a\u3044\u9650\u308a\u5229\u7528\u3057\u306a\u3044\u307b\u3046\u304c\u826f\u3044\u3067\u3057\u3087\u3046\u3002<\/strong><\/span><\/p>\n
\u300cNumber\u300d\u30d7\u30ed\u30d1\u30c6\u30a3\u4e00\u89a7<\/h3>\n
\u6b21\u306b\u3001\u300cNumber\u300d\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30d7\u30ed\u30d1\u30c6\u30a3<\/strong><\/span>\u306b\u3064\u3044\u3066\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff01<\/p>\n
\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u306f\u3001JavaScript\u306e\u6f14\u7b97\u3067\u6271\u3048\u308b\u6700\u5927\u5024 \/ \u6700\u5c0f\u5024\u3084\u7121\u9650\u5927<\/strong><\/span>\u3068\u3044\u3063\u305f\u7279\u6b8a\u306a\u5024\u3092\u7c21\u5358\u306b\u6c42\u3081\u3089\u308c\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u308b\u306e\u3067\u4fbf\u5229\u3067\u3059\u3002<\/p>\n
\u57fa\u672c\u7684\u306a\u30d7\u30ed\u30d1\u30c6\u30a3\u4e00\u89a7\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n\n\n\n\n\n\n\n\n\n
\u30d7\u30ed\u30d1\u30c6\u30a3\u540d<\/th>\n\u6982\u8981<\/th>\n<\/tr>\n
MAX_VALUE<\/td>\n\u8868\u73fe\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u6700\u3082\u5927\u304d\u306a\u5024<\/td>\n<\/tr>\n
MIN_VALUE<\/td>\n\u8868\u73fe\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u6700\u3082\u5c0f\u3055\u306a\u5024<\/td>\n<\/tr>\n
MAX_SAFE_INTEGER<\/td>\n\u5b89\u5168\u306b\u6271\u3046\u3053\u3068\u304c\u3067\u304d\u308b\u6700\u3082\u5927\u304d\u306a\u5024<\/td>\n<\/tr>\n
MIN_SAFE_INTEGER<\/td>\n\u5b89\u5168\u306b\u6271\u3046\u3053\u3068\u304c\u3067\u304d\u308b\u6700\u3082\u5c0f\u3055\u306a\u5024<\/td>\n<\/tr>\n
NEGATIVE_INFINITY<\/td>\n\u8ca0\uff08\u30de\u30a4\u30ca\u30b9\u5024\uff09\u306e\u7121\u9650\u5927<\/td>\n<\/tr>\n
POSITIVE_INFINITY<\/td>\n\u6b63\uff08\u30d7\u30e9\u30b9\u5024\uff09\u306e\u7121\u9650\u5927<\/td>\n<\/tr>\n
NaN<\/td>\n\u6570\u5024\u3067\u306f\u306a\u3044\u3053\u3068\u3092\u8868\u3059\u5024<\/td>\n<\/tr>\n<\/table>\n
\u3053\u308c\u3089\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u4f7f\u3044\u65b9\u3067\u3059\u304c\u3001\u3010 Number.\u30d7\u30ed\u30d1\u30c6\u30a3 \u3011<\/strong><\/span>\u306e\u3088\u3046\u306b\u7d9a\u3051\u3066\u30d7\u30ed\u30d1\u30c6\u30a3\u540d\u3092\u8a18\u8ff0\u3059\u308c\u3070OK\u3067\u3059\uff01<\/p>\n
\/\/\u2460 \u6700\u5927\u5024\u3092\u6c42\u3081\u308b\r\nconsole.log( Number.MAX_VALUE );\r\n\r\n\/\/\u2461 \u5b89\u5168\u306a\u6700\u5c0f\u5024\u3092\u6c42\u3081\u308b\r\nconsole.log( Number.MIN_SAFE_INTEGER );\r\n\r\n\/\/\u2462 NaN\u3092\u6c42\u3081\u308b\r\nconsole.log( Number.NaN );<\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/strong><\/span><\/p>\n
1.7976931348623157e+308\r\n-9007199254740991\r\nNaN<\/pre>\n
\u3053\u306e\u4f8b\u306e\u3088\u3046\u306b\u3001\u4f8b\u3048\u3070\u6700\u5927\u5024\u3092\u6c42\u3081\u308b\u30d7\u30ed\u30d1\u30c6\u30a3\u300cMAX_VALUE\u300d<\/strong><\/span>\u3092\u4f7f\u3046\u5834\u5408\u306f\u300cNumber.MAX_VALUE\u300d<\/strong><\/span>\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n
\u3061\u306a\u307f\u306b\u3001\u2461\u306e\u3088\u3046\u306a\u5b89\u5168\u306b\u6271\u3048\u308b\u300c\u6700\u5c0f\u5024 \/ \u6700\u5927\u5024\u300d\u3068\u3044\u3046\u306e\u306f\u3001JavaScript\u306e\u6f14\u7b97\u51e6\u7406\u304c\u4fdd\u8a3c\u3055\u308c\u3066\u3044\u308b<\/strong><\/span>\u3068\u3044\u3046\u610f\u5473\u3067\u3082\u3042\u308b\u306e\u3067\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n
\u300cNumber\u300d\u30e1\u30bd\u30c3\u30c9\u4e00\u89a7<\/h3>\n
\u4eca\u5ea6\u306f\u3001\u300cNumber\u300d\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30e1\u30bd\u30c3\u30c9<\/strong><\/span>\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n
\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u6570\u5024\u306e\u6587\u5b57\u5217\u5909\u63db\u3084\u6570\u5024\u304b\u3069\u3046\u304b\u306e\u5224\u65ad\u3001\u56db\u6368\u4e94\u5165\u3084\u6841\u6570\u5909\u63db\u306a\u3069<\/strong><\/span>\u6570\u5024\u3092\u4fbf\u5229\u306b\u6271\u3048\u308b\u3088\u3046\u306b\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u57fa\u672c\u7684\u306a\u30e1\u30bd\u30c3\u30c9\u306e\u4e00\u89a7\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\uff01<\/p>\n\n\n\n\n\n\n\n\n\n\n
\u30e1\u30bd\u30c3\u30c9\u540d<\/th>\n\u6982\u8981<\/th>\n<\/tr>\n
toString<\/td>\n\u6570\u5024\u3092\u6587\u5b57\u5217\u306b\u5909\u63db\uff08n\u9032\u6570\u306b\u5909\u63db\u3082\u53ef\u80fd\uff09<\/td>\n<\/tr>\n
toFixed<\/td>\n\u56db\u6368\u4e94\u5165\u3082\u3057\u304f\u306f\u5c0f\u6570\u70b9\u306e\u6841\u6570\u3092\u6307\u5b9a\u3059\u308b<\/td>\n<\/tr>\n
toPrecision<\/td>\n\u6307\u5b9a\u3057\u305f\u6841\u6570\u306b\u5909\u63db\u3059\u308b<\/td>\n<\/tr>\n
isNaN<\/td>\nNaN\u3067\u3042\u308b\u304b\u3069\u3046\u304b\u3092\u5224\u5b9a<\/td>\n<\/tr>\n
isFinite<\/td>\n\u6709\u9650\u306a\u6570\u5024\u3067\u3042\u308b\u304b\u3069\u3046\u304b\u3092\u5224\u5b9a<\/td>\n<\/tr>\n
isSafeInteger<\/td>\n\u5b89\u5168\u306a\u6570\u5024\u3067\u3042\u308b\u304b\u3069\u3046\u304b\u3092\u5224\u5b9a<\/td>\n<\/tr>\n
parseFloat<\/td>\n\u6587\u5b57\u5217\u306e\u6570\u5b57\u3092\u5c0f\u6570\u70b9\u306b\u5909\u63db\u3059\u308b<\/td>\n<\/tr>\n
parseInt<\/td>\n\u6587\u5b57\u5217\u306e\u6570\u5b57\u3092\u6574\u6570\u306b\u5909\u63db\u3059\u308b<\/td>\n<\/tr>\n<\/table>\n
\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\u3067\u3059\u304c\u3001\u3010 \u5024.\u30e1\u30bd\u30c3\u30c9 \u3011<\/strong><\/span>\u306e\u3088\u3046\u306b\u5bfe\u8c61\u3068\u306a\u308b\u5024\u306b\u5bfe\u3057\u3066\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n
\u6b21\u306e\u30b5\u30f3\u30d7\u30eb\u4f8b\u3092\u898b\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n
var num = 123;\r\nvar result1 = num.toString()\r\nvar result2 = num.toFixed(4);\r\n\r\nconsole.log( 'toString\uff1a' + result1 + ' \/ ' + typeof result1 );\r\nconsole.log( 'toFiexd\uff1a' + result2 );<\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/strong><\/span><\/p>\n
toString\uff1a123 \/ string\r\ntoFiexd\uff1a123.0000<\/pre>\n
\u3053\u306e\u4f8b\u3067\u306f\u3001\u6570\u5024\u300c123\u300d\u3092\u5909\u6570num\u306b\u4ee3\u5165\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u3053\u306enum\u306b\u5bfe\u3057\u3066\u3001\u4f8b\u3048\u3070\u6587\u5b57\u5217\u306b\u5909\u63db\u3057\u305f\u3051\u308c\u3070\u300cnum.toString()\u300d<\/strong><\/span>\u3068\u8a18\u8ff0\u3059\u308b\u308f\u3051\u3067\u3059\u3002<\/p>\n
\u5b9f\u884c\u7d50\u679c\u3092\u898b\u308b\u3068\u3001\u898b\u4e8b\u306b\u6570\u5024\u304c\u6587\u5b57\u5217\u578b(String)<\/strong><\/span>\u306b\u5909\u63db\u3055\u308c\u3066\u3044\u308b\u306e\u304c\u5206\u304b\u308a\u307e\u3059\u306d\u3002<\/p>\n
\u307e\u305f\u3001\u300ctoFixed(4)\u300d<\/strong><\/span>\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u3067\u5f37\u5236\u7684\u306b\u5c0f\u6570\u70b9\u7b2c4\u4f4d\u307e\u3067\u306e\u6570\u5024\u306b\u5909\u63db\u3059\u308b\u3053\u3068\u3082\u51fa\u6765\u3066\u3044\u308b\u306e\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n
\u3055\u3089\u306b\u3001\u3010 \u30e1\u30bd\u30c3\u30c9( \u5024 ) \u3011<\/strong><\/span>\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3059\u308b\u3053\u3068\u3067\u5bfe\u8c61\u3068\u306a\u308b\u5024\u3092\u5f15\u6570\u306b\u53d6\u308b\u30e1\u30bd\u30c3\u30c9\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n
var result1 = isNaN( 'hello' );\r\nvar result2 = parseInt( 12.345 );\r\n\r\nconsole.log( 'isNaN\uff1a' + result1 );\r\nconsole.log( 'parseInt\uff1a' + result2 );<\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/strong><\/span><\/p>\n
isNaN\uff1atrue\r\nparseInt\uff1a12<\/pre>\n
\u3053\u306e\u4f8b\u3067\u306f\u3001\u300cisNaN()\u300d<\/strong><\/span>\u306e\u5f15\u6570\u306b\u6587\u5b57\u5217\u306e\u300chello\u300d\u3092\u6307\u5b9a\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u6570\u5024\u3068\u8a8d\u8b58\u3067\u304d\u305a\u306bNaN<\/strong><\/span>\u3068\u306a\u308a\u7d50\u679c\u306ftrue\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u306d\u3002<\/p>\n
\u307e\u305f\u3001\u300cparseInt()\u300d<\/strong><\/span>\u306e\u5f15\u6570\u306b\u5c0f\u6570\u70b9\u306e\u300c12.345\u300d\u3092\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u6574\u6570<\/strong><\/span>\u306b\u5909\u63db\u3055\u308c\u3066\u7d50\u679c\u7684\u306b\u300c12\u300d\u304c\u8fd4\u3063\u3066\u3044\u308b\u306e\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n
\u3061\u306a\u307f\u306b\u3001\u300cisNaN()\u300d\u306a\u3069\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u6d3b\u7528\u3057\u305f\u6570\u5024\u30c1\u30a7\u30c3\u30af\u306e\u6d3b\u7528\u4e8b\u4f8b\u306b\u3064\u3044\u3066\u306f\u3001\u6b21\u306e\u8a18\u4e8b\u3067\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u308b\u306e\u3067\u53c2\u8003\u306b\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n            \n                
\n                
\n                    
\n                    \n                    <\/div>\n                    
\n                    
\u3010JavaScript\u5165\u9580\u3011\u6570\u5024\u30c1\u30a7\u30c3\u30af\u306e\u65b9\u6cd5\u307e\u3068\u3081(isNaN\/isFinite)<\/div>\n                    
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n                    <\/div>\n                <\/div>\n                <\/div>\n            <\/a>\n            \n
\u6587\u5b57\u5217\u21d4\u6570\u5024\u306e\u76f8\u4e92\u5909\u63db\u306b\u3064\u3044\u3066<\/h2>\n
\u300ctoString()\u300d\u3067\u6587\u5b57\u5217\u5909\u63db<\/h3>\n
\u6570\u5024\u578b\u3092\u6587\u5b57\u5217\u578b\u306b\u5909\u63db\u3059\u308b\u6700\u3082\u7c21\u5358\u306a\u65b9\u6cd5\u3068\u3057\u3066\u300ctoString()\u30e1\u30bd\u30c3\u30c9\u300d<\/strong><\/span>\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u3053\u308c\u306f\u3001\u6b63\u8ca0\u306e\u6570\u5024\u3084\u5c0f\u6570\u306a\u3069\u3092\u6587\u5b57\u5217\u306b\u5909\u63db\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/strong><\/span><\/p>\n
\u6b21\u306e\u30b5\u30f3\u30d7\u30eb\u4f8b\u3092\u898b\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n
console.log('(123).toString() = ' + (123).toString());\r\nconsole.log('(123.45).toString() = ' + (123.45).toString());\r\nconsole.log('(-123).toString() = ' + (-123).toString());<\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/strong><\/span><\/p>\n
(123).toString() = 123\r\n(123.45).toString() = 123.45\r\n(-123).toString() = -123<\/pre>\n
\u3053\u306e\u4f8b\u3067\u306f\u3001\u4efb\u610f\u306e\u6570\u5024\u306b\u5bfe\u3057\u3066\u300ctoString()\u300d<\/strong><\/span>\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u3067\u6587\u5b57\u5217\u306b\u5909\u63db\u3057\u3066\u3044\u308b\u306e\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n
\u307e\u305f\u3001\u9762\u767d\u3044\u306e\u306f\u5f15\u6570\u306b\u300c\u57fa\u6570\u300d<\/strong><\/span>\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\u300116\u9032\u6570\u30fb8\u9032\u6570\u30fb2\u9032\u6570\u306b\u5909\u63db\u3057\u305f\u3042\u3068\u3067\u6587\u5b57\u5217\u306b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u70b9\u3067\u3059\uff01<\/p>\n
console.log( '(255).toString(10) = ' + (255).toString(10) );\r\nconsole.log( '(255).toString(16) = ' + (255).toString(16) );\r\nconsole.log( '(255).toString(8) = ' + (255).toString(8) );\r\nconsole.log( '(255).toString(2) = ' + (255).toString(2) );<\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/strong><\/span><\/p>\n
(255).toString(10) = 255\r\n(255).toString(16) = ff\r\n(255).toString(8) = 377\r\n(255).toString(2) = 11111111<\/pre>\n
\u3053\u306e\u4f8b\u3067\u306f\u3001\u300c255\u300d\u3068\u3044\u3046\u6570\u5024\u3092\u300c10\u9032\u6570\u30fb16\u9032\u6570\u30fb8\u9032\u6570\u30fb2\u9032\u6570\u300d<\/strong><\/span>\u306b\u5909\u63db\u3057\u305f\u6587\u5b57\u5217\u306e\u4f8b\u3067\u3059\u3002<\/p>\n
\u4f8b\u3048\u3070\u300116\u9032\u6570\u306b\u5909\u63db\u3057\u305f\u6587\u5b57\u5217\u3092\u4f5c\u6210\u3057\u305f\u3051\u308c\u3070\u300c (255).toString(16)\u300d<\/strong><\/span>\u306e\u3088\u3046\u306b\u5f15\u6570\u3078\u300c16\u300d\u3092\u6307\u5b9a\u3059\u308c\u3070\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u4ee5\u4e0a\u306e\u3088\u3046\u306b\u3001\u6b63\u8ca0\u306e\u6570\u5024\u3084\u5c0f\u6570\u3092\u6587\u5b57\u5217\u306b\u5909\u63db\u3067\u304d\u3001\u307e\u305f\u3001toString()\u306e\u5f15\u6570\u306b\u57fa\u6570\u3092\u6307\u5b9a\u3057\u305f\u6587\u5b57\u5217\u306b\u5909\u63db\u3067\u304d\u308b\u308f\u3051\u3067\u3059\u3002<\/p>\n
\u300cparseInt()\u300d\u3067\u6570\u5024\u5909\u63db<\/h3>\n
\u6587\u5b57\u5217\u578b\u3092\u6570\u5024\u578b\u3078\u5909\u63db\u3059\u308b\u6700\u3082\u7c21\u5358\u306a\u65b9\u6cd5\u306f\u300cparseInt()\u300d<\/strong><\/span>\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3059\uff01<\/p>\n
\u8a18\u8ff0\u65b9\u6cd5\u3068\u3057\u3066\u306f\u3001\u3010 parseInt( \u6587\u5b57\u5217, \u57fa\u6570 ) \u3011<\/strong><\/span>\u306e\u3088\u3046\u306b\u5f15\u6570\u3078\u5909\u63db\u3057\u305f\u3044\u300c\u6587\u5b57\u5217\u300d<\/strong><\/span>\u3068\u300c\u57fa\u6570\u300d<\/strong><\/span>\u3092\u6307\u5b9a\u3059\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n
\u6b21\u306e\u30b5\u30f3\u30d7\u30eb\u4f8b\u3092\u898b\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n
console.log( 'parseInt("12345") = ' + parseInt('12345', 10) );\r\nconsole.log( 'parseInt("123.45") = ' + parseInt('123.45', 10) );\r\nconsole.log( 'parseInt("-12345") = ' + parseInt('-12345', 10) );<\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/strong><\/span><\/p>\n
parseInt("12345") = 12345\r\nparseInt("123.45") = 123\r\nparseInt("-12345") = -12345<\/pre>\n
\u3053\u306e\u4f8b\u3067\u306f\u3001\u6587\u5b57\u5217\u306e\u6570\u5b57\u306b\u5bfe\u3057\u3066parseInt()<\/strong><\/span>\u3092\u5b9f\u884c\u3057\u3066\u3044\u308b\u306e\u304c\u5206\u304b\u308a\u307e\u3059\u306d\u3002<\/p>\n
\u6ce8\u610f\u70b9\u3068\u3057\u3066\u306f\u3001parseInt()\u3067\u5909\u63db\u3055\u308c\u305f\u6570\u5024\u306f\u300c\u6574\u6570\u300d<\/strong><\/span>\u306a\u306e\u3067\u5c0f\u6570\u70b9\u306f\u6392\u9664\u3055\u308c\u308b<\/strong><\/span>\u3068\u3044\u3046\u3053\u3068\u3092\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n
\u307e\u305f\u3001\u6570\u5b57\u3067\u306f\u306a\u3044\u6587\u5b57\u5217\u3060\u3063\u305f\u5834\u5408\u306e\u6319\u52d5\u3082\u898b\u3066\u304a\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n
console.log( 'parseInt("hello") = ' + parseInt('hello', 10) );\r\nconsole.log( 'parseInt("123hello") = ' + parseInt('123hello', 10) );<\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/strong><\/span><\/p>\n
parseInt("hello") = NaN\r\nparseInt("123hello") = 123<\/pre>\n
1\u3064\u76ee\u306f\u6587\u5b57\u5217\u300chello\u300d\u304c\u5f15\u6570\u306b\u6307\u5b9a\u3055\u308c\u3066\u3044\u308b\u306e\u3067\u3001\u6570\u5024\u3068\u3057\u3066\u8a8d\u8b58\u3067\u304d\u306a\u304b\u3063\u305f\u3053\u3068\u3092\u610f\u5473\u3059\u308b\u300cNaN\u300d<\/strong><\/span>\u304c\u8fd4\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
2\u3064\u76ee\u306f\u5148\u982d\u304c\u6570\u5b57\u3067\u6b21\u306b\u6587\u5b57\u5217\u300chello\u300d\u304c\u304f\u3063\u3064\u3044\u3066\u3044\u308b\u5834\u5408\u3067\u3059\u304c\u3001\u5148\u982d\u306e\u6570\u5b57\u90e8\u5206\u3060\u3051\u8a8d\u8b58\u3055\u308c\u3066\u3044\u308b<\/strong><\/span>\u306e\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n
\u3053\u306e\u3053\u3068\u304b\u3089\u3082\u5206\u304b\u308b\u3088\u3046\u306b\u3001parseInt()\u306f\u5148\u982d\u304c\u6570\u5b57\u3067\u59cb\u307e\u308b\u6587\u5b57\u5217\u3060\u3051\u6570\u5024\u306b\u5909\u63db\u3067\u304d\u308b\u3068\u3044\u3046\u30e1\u30bd\u30c3\u30c9\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u3055\u3089\u306b\u3001\u7b2c2\u5f15\u6570\u306e\u300c\u57fa\u6570\u300d<\/strong><\/span>\u3092\u5909\u3048\u308b\u3053\u3068\u306710\u9032\u6570\u3060\u3051\u3067\u306a\u304f\u300116\u9032\u6570\u30fb8\u9032\u6570\u306a\u3069\u3082\u6271\u3048\u307e\u3059\uff01<\/p>\n
console.log( 'parseInt("0xFFFF") = ' + parseInt('0xFFFF', 16) );\r\nconsole.log( 'parseInt("0o755") = ' + parseInt('755', 8) );<\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/strong><\/span><\/p>\n
parseInt("0xFFFF") = 65535\r\nparseInt("0o755") = 493<\/pre>\n
\u4f8b\u3048\u3070\u300116\u9032\u6570\u306e\u6587\u5b57\u5217\u300c0xFFFF\u300d<\/strong><\/span>\u3092parseInt()\u3059\u308b\u969b\u306b\u3001\u57fa\u6570\u309216\u306b\u6307\u5b9a\u3059\u308c\u3070\u7d50\u679c\u306f10\u9032\u6570\u306e\u5024<\/strong><\/span>\u306b\u5909\u63db\u3055\u308c\u308b\u308f\u3051\u3067\u3059\u3002<\/p>\n
\u3064\u307e\u308a\u3001\u6307\u5b9a\u3055\u308c\u305f\u6587\u5b57\u5217\u304c16\u9032\u6570<\/strong><\/span>\u3067\u3042\u308b\u3068\u3044\u3046\u3053\u3068\u3092\u660e\u793a\u7684\u306bJavaScript\u306b\u6559\u3048\u3066\u3042\u3052\u3066\u3044\u308b\u308f\u3051\u3067\u3059\u3002<\/p>\n
\u4ee5\u4e0a\u306e\u3088\u3046\u306b\u3001parseInt()\u3092\u4f7f\u3046\u3068\u6b63\u8ca0\u306e\u6570\u5024\u3001\u5c0f\u6570\u3001\u975e\u6570\u5024\u300116\u9032\u6570\u30018\u9032\u6570\u306a\u3069\u306e\u6587\u5b57\u5217\u3092\u6570\u5024\u306b\u5909\u63db\u3067\u304d\u308b\u308f\u3051\u3067\u3059\u3002<\/p>\n
\u307e\u305f\u3001parseInt()\u306b\u3064\u3044\u3066\u66f4\u306a\u308b\u6d3b\u7528\u4e8b\u4f8b\u3084\u30a8\u30e9\u30fc\u51e6\u7406\u306a\u3069\u306e\u624b\u6cd5\u3092\u6b21\u306e\u8a18\u4e8b\u3067\u8a73\u3057\u304f\u307e\u3068\u3081\u3066\u3044\u308b\u306e\u3067\u305c\u3072\u53c2\u8003\u306b\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n            \n                
\n                
\n                    
\n                    \n                    <\/div>\n                    
\n                    
\u3010JavaScript\u5165\u9580\u3011\u6587\u5b57\u5217\u3092\u6570\u5024\u306b\u5909\u63db\u3059\u308b\u65b9\u6cd5\uff5cparseInt\u3001 parseFloat<\/div>\n                    
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n                    <\/div>\n                <\/div>\n                <\/div>\n            <\/a>\n            \n
\u6570\u5024\u578b\u306e\u6841\u533a\u5207\u308a\u3068\u6841\u6570\u306b\u3064\u3044\u3066<\/h2>\n
\u6570\u5024\u578b\u306e\u6841\u533a\u5207\u308a<\/h3>\n
\u6570\u5024\u578b\u3092\u6841\u533a\u5207\u308a\u3057\u305f\u6587\u5b57\u5217\u306b\u5909\u63db\u3059\u308b\u306b\u306f\u3001Number\u578b\u306etoLocaleString()\u30e1\u30bd\u30c3\u30c9<\/strong><\/span>\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n
\u305f\u3060\u3057\u3001\u5c0f\u6570\u70b9\u4ee5\u4e0b\u306f3\u6841\u307e\u3067<\/strong><\/span>\u3057\u304b\u8868\u793a\u3055\u308c\u305a\u3001\u5c0f\u6570\u70b9\u4e0b4\u6841\u4ee5\u964d\u306f\u4e0b3\u6841\u306b\u4e38\u3081<\/strong><\/span>\u3089\u308c\u307e\u3059\u3002<\/p>\n
\r\nwindow.onload = function () {\r\n    \/\/ \u6570\u5024\u578b\u306e\u6841\u533a\u5207\u308a\r\n    var num1 = 1234567;\r\n    var num2 = 1234567.567;\r\n    var num3 = 1234567.567890;\r\n    console.log('1234567 = ' + num1.toLocaleString());\r\n    console.log('1234567.567 = ' + num2.toLocaleString());\r\n    \/\/ \u5c0f\u6570\u70b9\u4ee5\u4e0b\u306e\u6841\u6570\u306f3\u6841\u3067\u4e38\u3081\u3089\u308c\u307e\u3059\u3002\r\n    console.log('1234567.567890 = ' + num3.toLocaleString());\r\n}\r\n<\/pre>\n
\r\n1234567 = 1,234,567\r\n1234567.567 = 1,234,567.567\r\n1234567.567890 = 1,234,567.568\r\n<\/pre>\n
\u4ee5\u4e0a\u306e\u3088\u3046\u306b\u3001toLocaleString()\u30e1\u30bd\u30c3\u30c9\u3067\u6841\u533a\u5207\u308a\u304c\u884c\u308f\u308c\u307e\u3059\u304c\u3001\u5c0f\u6570\u70b9\u4ee5\u4e0b\u306f3\u6841\u307e\u3067\u3057\u304b\u8868\u793a\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u306d\u3002<\/p>\n
\u6570\u5024\u578b\u306e\u6841\u6570<\/h3>\n
\u6570\u5024\u578b\u306e\u6841\u6570\u3092\u6570\u3048\u308b\u30e1\u30bd\u30c3\u30c9\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n
\u305d\u306e\u305f\u3081\u3001\u81ea\u5206\u3067\u5b9f\u88c5<\/strong><\/span>\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u306e getNumLength()\u3092\u53c2\u8003\u306b\u3055\u308c\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
getNumLength()\u306f\u8ca0\u6570\u306e\u5834\u5408\u306e\u300c-\u300d\u3092\u6841\u6570\u306b\u52a0\u3048\u306a\u3044\u3088\u3046\u306bMath.abs()<\/strong><\/span>\u3067\u6570\u5024\u306e\u7d76\u5bfe\u5024\u3092\u3068\u308a\u3001\u305d\u306e\u5f8c\u3001\u6587\u5b57\u5217\u306b\u5909\u63db\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u305d\u306e\u6587\u5b57\u5217\u306e\u6587\u5b57\u6570\u304c\u6570\u5024\u306e\u6841\u6570\u3068\u4e00\u81f4<\/strong><\/span>\u3059\u308b\u305f\u3081\u3001\u6587\u5b57\u5217\u306e\u6587\u5b57\u6570\u3092length\u30e1\u30bd\u30c3\u30c9<\/strong><\/span>\u3067\u6c42\u3081\u3001\u8fd4\u5024\u306b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u4f46\u3057\u3001 getNumLength()\u306f\u3001\u6574\u6570\u306e\u6841\u6570\u3057\u304b\u6570\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n
\u4f8b\u3048\u3070\u3001\u5c0f\u6570\u70b9\u4ee5\u4e0b\u3092\u8003\u616e\u3057\u305f\u6841\u6570\u3092\u6570\u3048\u308b\u5834\u5408\u306f\u3001\u4ed5\u69d8\u306b\u5fdc\u3058\u3066\u5b9f\u88c5\u3055\u308c\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
\r\nwindow.onload = function () {\r\n    \/\/ \u6570\u5024\u578b\u306e\u6841\u6570\r\n    function getNumLength(num) {\r\n        return Math.abs(num).toString().length;\r\n    }\r\n    var num1 = 123;\r\n    var num2 = 123456;\r\n    var num3 = -123456;\r\n    console.log("123 len = " + getNumLength(num1));\r\n    console.log("123456 len = " + getNumLength(num2));\r\n    console.log("-123456 len = " + getNumLength(num3));\r\n}\r\n<\/pre>\n
\r\n123 len = 3\r\n123456 len = 6\r\n-123456 len = 6\r\n<\/pre>\n
\u4ee5\u4e0a\u306e\u3088\u3046\u306b\u3001 getNumLength()\u306f\u6574\u6570\u306a\u3089\u3070\u6b63\u8ca0\u306b\u95a2\u308f\u3089\u305a\u3001\u6841\u6570\u3092\u53d6\u5f97\u3067\u304d\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u6570\u5024\u578b\u306e\u578b\u306b\u3064\u3044\u3066<\/h2>\n
\u6570\u5024\u3084\u7121\u9650\u5927\u30ea\u30c6\u30e9\u30eb\u3001\u6700\u5c0f\u5024\u30ea\u30c6\u30e9\u30eb\u3001\u975e\u6570\u5024\u30ea\u30c6\u30e9\u30eb\u3001Number\u578b\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u5f15\u6570\u306bnull\u3092\u4e0e\u3048\u305f\u3068\u304d\u306e\u6570\u5024\u306a\u3069\u306b\u3064\u3044\u3066\u3001\u305d\u308c\u305e\u308c\u306e\u578b\u3092typeof\u6f14\u7b97\u5b50<\/strong><\/span>\u3067\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
\r\nwindow.onload = function () {\r\n    \/\/ \u6570\u5024\u578b\u306e\u578b\r\n    console.log('typeof (Number(123.45)) = ' + typeof (Number(123.45)));\r\n    console.log('typeof (Number(-123.45)) = ' + typeof (Number(-123.45)));\r\n    console.log('typeof (Number.POSITIVE_INFINITY) = ' + typeof (Number.POSITIVE_INFINITY));\r\n    console.log('typeof (Number.MIN_VALUE) = ' + typeof (Number.MIN_VALUE));\r\n    console.log('typeof (Number.NaN) = ' + typeof (Number.NaN));\r\n    console.log('typeof (Number(null)) = ' + typeof (Number(null)));\r\n}\r\n<\/pre>\n
\r\ntypeof (Number(123.45)) = number\r\ntypeof (Number(-123.45)) = number\r\ntypeof (Number.POSITIVE_INFINITY) = number\r\ntypeof (Number.MIN_VALUE) = number\r\ntypeof (Number.NaN) = number\r\ntypeof (Number(null)) = number\r\n<\/pre>\n
\u4ee5\u4e0a\u306e\u3088\u3046\u306b\u3001\u3044\u305a\u308c\u306e\u5834\u5408\u306b\u304a\u3044\u3066\u3082\u3001typeof\u6f14\u7b97\u5b50\u306e\u578b\u5224\u5b9a\u7d50\u679c\u306f \u201cnumber\u201d<\/strong><\/span> \u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u7121\u9650\u5927\u30ea\u30c6\u30e9\u30eb\u3084\u975e\u6570\u5024\u30ea\u30c6\u30e9\u30eb\u306a\u3069\u6570\u5024\u3067\u306f\u8868\u305b\u306a\u3044\u30ea\u30c6\u30e9\u30eb\u306a\u3069\u3082\u578b\u306f\u6570\u5024\u578b<\/strong><\/span>\u3067\u3042\u308b\u3053\u3068\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n
\u307e\u3068\u3081<\/h2>\n
\u3044\u304b\u304c\u3067\u3057\u305f\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n
\u6570\u5024\u578b\u306ftoLocaleString()\u30e1\u30bd\u30c3\u30c9<\/strong><\/span>\u3092\u4f7f\u7528\u3057\u3066\u6841\u533a\u5207\u308a\u306e\u6587\u5b57\u5217<\/strong><\/span>\u306b\u5909\u63db\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n
\u305f\u3060\u3001\u6570\u5024\u578b\u306e\u6841\u6570<\/strong><\/span>\u3092\u6c42\u3081\u308b\u306b\u306f\u3001\u81ea\u5206\u3067\u30ed\u30b8\u30c3\u30af\u3092\u5b9f\u88c5<\/strong><\/span>\u3057\u306a\u3044\u3068\u3044\u3051\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/p>\n
\u307e\u305f\u3001\u6570\u5024\u578b\u3068\u6587\u5b57\u5217\u578b\u306f\u306e\u76f8\u4e92\u5909\u63db<\/strong><\/span>\u3067\u304d\u3001\u5909\u63db\u3059\u308b\u969b\u306b\u306f\u57fa\u6570\u3092\u6307\u5b9a<\/strong><\/span>\u3057\u300116\u9032\u6570\u30848\u9032\u6570\u30012\u9032\u6570\u306a\u3069\u3067\u306e\u5909\u63db\u3082\u53ef\u80fd\u3067\u3057\u305f\u3002<\/p>\n
\u6570\u5024\u578b\u306b\u306f\u7121\u9650\u5927\u3084\u7121\u9650\u5c0f\u3001\u6700\u5927\u5024\u3001\u6700\u5c0f\u5024\u3001\u975e\u6570\u5024\u306a\u3069\u3082\u5b9a\u7fa9\u3055\u308c\u3066\u304a\u308a\u3001\u305d\u308c\u3089\u306f\u30ea\u30c6\u30e9\u30eb<\/strong><\/span>\u3068\u3057\u3066\u6271\u3046\u3053\u3068\u304c\u53ef\u80fd\u3067\u3057\u305f\u3002<\/p>\n
\u307e\u305f\u3001\u305d\u308c\u3089\u30ea\u30c6\u30e9\u30eb\u306e\u578b\u3082\u6570\u5024\u578b<\/strong><\/span>\u3067\u3057\u305f\u3002<\/p>\n
\u6570\u5024\u578b\u3084\u305d\u306e\u30ea\u30c6\u30e9\u30eb\u3001\u6587\u5b57\u5217\u578b\u3068\u306e\u76f8\u4e92\u5909\u63db\u306a\u3069\u3082\u3001\u5b9f\u52d9\u3067\u591a\u7528<\/strong><\/span>\u3057\u307e\u3059\u306e\u3067\u3001\u305c\u3072\u3001\u3053\u3053\u3067\u899a\u3048\u3066\u304a\u3044\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
JavaScript\u306e\u6570\u5024\u578b\u306b\u3064\u3044\u3066\u5fd8\u308c\u3066\u3057\u307e\u3063\u305f\u3089\u3001\u307e\u305f\u3053\u306e\u30da\u30fc\u30b8\u3092\u3054\u89a7\u306b\u306a\u3063\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u3053\u3093\u306b\u3061\u306f\uff01Web\u30b3\u30fc\u30c0\u30fc\u30fb\u30d7\u30ed\u30b0\u30e9\u30de\u30fc\u306e\u8c9d\u539f\uff08@touhicomu\uff09\u3067\u3059\u3002 \u4eca\u65e5\u306f\u3001JavaScript\u3067\u6570\u5024\u3092\u6271\u3046\u305f\u3081\u306eNumber\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002 \u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001 \u30fb\u305d\u3082\u305d\u3082\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068 […]<\/p>\n","protected":false},"author":4,"featured_media":60566,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"swell_btn_cv_data":"","footnotes":""},"categories":[2346],"tags":[95],"class_list":["post-23408","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-javascript-study","tag-javascript"],"acf":[],"yoast_head":"\nJavaScript\u3067Number\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f7f\u3044\u65b9(\u30d7\u30ed\u30d1\u30c6\u30a3\u3001\u30e1\u30bd\u30c3\u30c9\u4e00\u89a7) | \u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u30d6\u30ed\u30b0<\/title>\n<meta name=\"description\" content=\"\u3053\u306e\u8a18\u4e8b\u3067\u306f\u300c JavaScript\u3067Number\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f7f\u3044\u65b9(\u30d7\u30ed\u30d1\u30c6\u30a3\u3001\u30e1\u30bd\u30c3\u30c9\u4e00\u89a7) \u300d\u306b\u3064\u3044\u3066\u3001\u8ab0\u3067\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3092\u8aad\u3081\u3070\u3001\u3042\u306a\u305f\u306e\u60a9\u307f\u304c\u89e3\u6c7a\u3059\u308b\u3060\u3051\u3058\u3083\u306a\u304f\u3001\u65b0\u305f\u306a\u6c17\u4ed8\u304d\u3082\u767a\u898b\u3067\u304d\u308b\u3053\u3068\u3067\u3057\u3087\u3046\u3002\u304a\u60a9\u307f\u306e\u65b9\u306f\u305c\u3072\u3054\u4e00\u8aad\u304f\u3060\u3055\u3044\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.sejuku.net\/blog\/23408\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"JavaScript\u3067Number\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f7f\u3044\u65b9(\u30d7\u30ed\u30d1\u30c6\u30a3\u3001\u30e1\u30bd\u30c3\u30c9\u4e00\u89a7) | \u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u30d6\u30ed\u30b0\" \/>\n<meta property=\"og:description\" content=\"\u3053\u306e\u8a18\u4e8b\u3067\u306f\u300c JavaScript\u3067Number\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f7f\u3044\u65b9(\u30d7\u30ed\u30d1\u30c6\u30a3\u3001\u30e1\u30bd\u30c3\u30c9\u4e00\u89a7) \u300d\u306b\u3064\u3044\u3066\u3001\u8ab0\u3067\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3092\u8aad\u3081\u3070\u3001\u3042\u306a\u305f\u306e\u60a9\u307f\u304c\u89e3\u6c7a\u3059\u308b\u3060\u3051\u3058\u3083\u306a\u304f\u3001\u65b0\u305f\u306a\u6c17\u4ed8\u304d\u3082\u767a\u898b\u3067\u304d\u308b\u3053\u3068\u3067\u3057\u3087\u3046\u3002\u304a\u60a9\u307f\u306e\u65b9\u306f\u305c\u3072\u3054\u4e00\u8aad\u304f\u3060\u3055\u3044\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.sejuku.net\/blog\/23408\" \/>\n<meta property=\"og:site_name\" content=\"\u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u30d6\u30ed\u30b0\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/sejuku2013\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/sejuku2013\/\" \/>\n<meta property=\"article:published_time\" content=\"2017-05-19T06:40:33+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-05-06T02:42:33+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2018\/06\/js_object.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"700\" \/>\n\t<meta property=\"og:image:height\" content=\"400\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"\u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u7de8\u96c6\u90e8\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@https:\/\/twitter.com\/samuraijuku\" \/>\n<meta name=\"twitter:site\" content=\"@samuraijuku\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/23408#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/23408\"},\"author\":{\"name\":\"\u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u7de8\u96c6\u90e8\",\"@id\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/#\\\/schema\\\/person\\\/e8ca7fd09857a736a25e6b4455a3ab61\"},\"headline\":\"JavaScript\u3067Number\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f7f\u3044\u65b9(\u30d7\u30ed\u30d1\u30c6\u30a3\u3001\u30e1\u30bd\u30c3\u30c9\u4e00\u89a7)\",\"datePublished\":\"2017-05-19T06:40:33+00:00\",\"dateModified\":\"2024-05-06T02:42:33+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/23408\"},\"wordCount\":142,\"publisher\":{\"@id\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/23408#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/wp-content\\\/uploads\\\/2018\\\/06\\\/js_object.jpg\",\"keywords\":[\"JavaScript\"],\"articleSection\":[\"Javascript\u5b66\u7fd2\"],\"inLanguage\":\"ja\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/23408\",\"url\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/23408\",\"name\":\"JavaScript\u3067Number\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f7f\u3044\u65b9(\u30d7\u30ed\u30d1\u30c6\u30a3\u3001\u30e1\u30bd\u30c3\u30c9\u4e00\u89a7) | \u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u30d6\u30ed\u30b0\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/23408#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/23408#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/wp-content\\\/uploads\\\/2018\\\/06\\\/js_object.jpg\",\"datePublished\":\"2017-05-19T06:40:33+00:00\",\"dateModified\":\"2024-05-06T02:42:33+00:00\",\"description\":\"\u3053\u306e\u8a18\u4e8b\u3067\u306f\u300c JavaScript\u3067Number\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f7f\u3044\u65b9(\u30d7\u30ed\u30d1\u30c6\u30a3\u3001\u30e1\u30bd\u30c3\u30c9\u4e00\u89a7) \u300d\u306b\u3064\u3044\u3066\u3001\u8ab0\u3067\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3092\u8aad\u3081\u3070\u3001\u3042\u306a\u305f\u306e\u60a9\u307f\u304c\u89e3\u6c7a\u3059\u308b\u3060\u3051\u3058\u3083\u306a\u304f\u3001\u65b0\u305f\u306a\u6c17\u4ed8\u304d\u3082\u767a\u898b\u3067\u304d\u308b\u3053\u3068\u3067\u3057\u3087\u3046\u3002\u304a\u60a9\u307f\u306e\u65b9\u306f\u305c\u3072\u3054\u4e00\u8aad\u304f\u3060\u3055\u3044\u3002\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/23408#breadcrumb\"},\"inLanguage\":\"ja\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/23408\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"ja\",\"@id\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/23408#primaryimage\",\"url\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/wp-content\\\/uploads\\\/2018\\\/06\\\/js_object.jpg\",\"contentUrl\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/wp-content\\\/uploads\\\/2018\\\/06\\\/js_object.jpg\",\"width\":700,\"height\":400},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/23408#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"JavaScript\u3067Number\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f7f\u3044\u65b9(\u30d7\u30ed\u30d1\u30c6\u30a3\u3001\u30e1\u30bd\u30c3\u30c9\u4e00\u89a7)\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/#website\",\"url\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/\",\"name\":\"\u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u30d6\u30ed\u30b0\",\"description\":\"\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u5b66\u7fd2\u306e\u3059\u3079\u3066\u304c\u30b3\u30b3\u306b\u3002\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"ja\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/#organization\",\"name\":\"\u682a\u5f0f\u4f1a\u793eSAMURAI\",\"url\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ja\",\"@id\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/wp-content\\\/uploads\\\/2023\\\/07\\\/logo.png\",\"contentUrl\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/wp-content\\\/uploads\\\/2023\\\/07\\\/logo.png\",\"width\":600,\"height\":600,\"caption\":\"\u682a\u5f0f\u4f1a\u793eSAMURAI\"},\"image\":{\"@id\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/sejuku2013\",\"https:\\\/\\\/x.com\\\/samuraijuku\",\"https:\\\/\\\/www.youtube.com\\\/channel\\\/UCCFOQO5aDK0xXam4cUQXT8g\\\/featured\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/#\\\/schema\\\/person\\\/e8ca7fd09857a736a25e6b4455a3ab61\",\"name\":\"\u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u7de8\u96c6\u90e8\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ja\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/507c280c5c67d2c11fec4fdba20e5bf1ec2fe91f9deb42d2ec50382778b311bf?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/507c280c5c67d2c11fec4fdba20e5bf1ec2fe91f9deb42d2ec50382778b311bf?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/507c280c5c67d2c11fec4fdba20e5bf1ec2fe91f9deb42d2ec50382778b311bf?s=96&d=mm&r=g\",\"caption\":\"\u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u7de8\u96c6\u90e8\"},\"description\":\"\u3010\u30d7\u30ed\u30d5\u30a3\u30fc\u30eb\u3011 DX\u8a8d\u5b9a\u53d6\u5f97\u4e8b\u696d\u8005\u306b\u9078\u5b9a\u3055\u308c\u3066\u3044\u308b\u682a\u5f0f\u4f1a\u793eSAMURAI\u306e\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u30fb\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3\u90e8\u304c\u904b\u55b6\u3002\u300c\u8cea\u306e\u9ad8\u3044IT\u6559\u80b2\u3092\u3001\u3059\u3079\u3066\u306e\u4eba\u306b\u300d\u3092\u30df\u30c3\u30b7\u30e7\u30f3\u306b\u3001IT\u30fb\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u5b66\u3073\u59cb\u3081\u305f\u521d\u5b66\u8005\u306e\u65b9\u306b\u5411\u3051\u8a18\u4e8b\u3092\u57f7\u7b46\u3002 \u7d2f\u8a08\u6307\u5c0e\u8005\u65704\u4e075,000\u540d\u4ee5\u4e0a\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\u300c\u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u300d\u3001\u7d2f\u8a08\u767b\u9332\u8005\u65701\u4e078,000\u4eba\u4ee5\u4e0a\u306e\u30aa\u30f3\u30e9\u30a4\u30f3\u5b66\u7fd2\u30b5\u30fc\u30d3\u30b9\u300c\u4f8d\u30c6\u30e9\u30b3\u30e4\u300d\u3067\u6271\u3046\u6559\u6750\u958b\u767a\u306e\u30ce\u30a6\u30cf\u30a6\u30012013\u5e74\u306e\u5275\u696d\u304b\u3089\u904b\u55b6\u3067\u5f97\u305f\u77e5\u898b\u306b\u57fa\u3065\u304d\u3001\u8a18\u4e8b\u306e\u57f7\u7b46\u3060\u3051\u3067\u306a\u304f\u7de8\u96c6\u30fb\u76e3\u4fee\u3082\u62c5\u5f53\u3057\u3066\u3044\u307e\u3059\u3002 \u3010\u5c02\u9580\u5206\u91ce\u3011 IT\\\/Web\u958b\u767a\\\/AI\u30fb\u30ed\u30dc\u30c3\u30c8\u958b\u767a\\\/\u30a4\u30f3\u30d5\u30e9\u958b\u767a\\\/\u30b2\u30fc\u30e0\u958b\u767a\\\/AI\\\/Web\u30c7\u30b6\u30a4\u30f3\",\"sameAs\":[\"https:\\\/\\\/www.sejuku.net\\\/\",\"https:\\\/\\\/www.facebook.com\\\/sejuku2013\\\/\",\"https:\\\/\\\/www.instagram.com\\\/samuraiengineer_official\\\/\",\"https:\\\/\\\/x.com\\\/https:\\\/\\\/twitter.com\\\/samuraijuku\",\"https:\\\/\\\/www.youtube.com\\\/channel\\\/UCCFOQO5aDK0xXam4cUQXT8g\"],\"url\":\"https:\\\/\\\/www.sejuku.net\\\/blog\\\/author\\\/samurai-blog\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"JavaScript\u3067Number\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f7f\u3044\u65b9(\u30d7\u30ed\u30d1\u30c6\u30a3\u3001\u30e1\u30bd\u30c3\u30c9\u4e00\u89a7) | \u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u30d6\u30ed\u30b0","description":"\u3053\u306e\u8a18\u4e8b\u3067\u306f\u300c JavaScript\u3067Number\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f7f\u3044\u65b9(\u30d7\u30ed\u30d1\u30c6\u30a3\u3001\u30e1\u30bd\u30c3\u30c9\u4e00\u89a7) \u300d\u306b\u3064\u3044\u3066\u3001\u8ab0\u3067\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3092\u8aad\u3081\u3070\u3001\u3042\u306a\u305f\u306e\u60a9\u307f\u304c\u89e3\u6c7a\u3059\u308b\u3060\u3051\u3058\u3083\u306a\u304f\u3001\u65b0\u305f\u306a\u6c17\u4ed8\u304d\u3082\u767a\u898b\u3067\u304d\u308b\u3053\u3068\u3067\u3057\u3087\u3046\u3002\u304a\u60a9\u307f\u306e\u65b9\u306f\u305c\u3072\u3054\u4e00\u8aad\u304f\u3060\u3055\u3044\u3002","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.sejuku.net\/blog\/23408","og_locale":"ja_JP","og_type":"article","og_title":"JavaScript\u3067Number\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f7f\u3044\u65b9(\u30d7\u30ed\u30d1\u30c6\u30a3\u3001\u30e1\u30bd\u30c3\u30c9\u4e00\u89a7) | \u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u30d6\u30ed\u30b0","og_description":"\u3053\u306e\u8a18\u4e8b\u3067\u306f\u300c JavaScript\u3067Number\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f7f\u3044\u65b9(\u30d7\u30ed\u30d1\u30c6\u30a3\u3001\u30e1\u30bd\u30c3\u30c9\u4e00\u89a7) \u300d\u306b\u3064\u3044\u3066\u3001\u8ab0\u3067\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3092\u8aad\u3081\u3070\u3001\u3042\u306a\u305f\u306e\u60a9\u307f\u304c\u89e3\u6c7a\u3059\u308b\u3060\u3051\u3058\u3083\u306a\u304f\u3001\u65b0\u305f\u306a\u6c17\u4ed8\u304d\u3082\u767a\u898b\u3067\u304d\u308b\u3053\u3068\u3067\u3057\u3087\u3046\u3002\u304a\u60a9\u307f\u306e\u65b9\u306f\u305c\u3072\u3054\u4e00\u8aad\u304f\u3060\u3055\u3044\u3002","og_url":"https:\/\/www.sejuku.net\/blog\/23408","og_site_name":"\u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u30d6\u30ed\u30b0","article_publisher":"https:\/\/www.facebook.com\/sejuku2013","article_author":"https:\/\/www.facebook.com\/sejuku2013\/","article_published_time":"2017-05-19T06:40:33+00:00","article_modified_time":"2024-05-06T02:42:33+00:00","og_image":[{"width":700,"height":400,"url":"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2018\/06\/js_object.jpg","type":"image\/jpeg"}],"author":"\u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u7de8\u96c6\u90e8","twitter_card":"summary_large_image","twitter_creator":"@https:\/\/twitter.com\/samuraijuku","twitter_site":"@samuraijuku","schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.sejuku.net\/blog\/23408#article","isPartOf":{"@id":"https:\/\/www.sejuku.net\/blog\/23408"},"author":{"name":"\u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u7de8\u96c6\u90e8","@id":"https:\/\/www.sejuku.net\/blog\/#\/schema\/person\/e8ca7fd09857a736a25e6b4455a3ab61"},"headline":"JavaScript\u3067Number\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f7f\u3044\u65b9(\u30d7\u30ed\u30d1\u30c6\u30a3\u3001\u30e1\u30bd\u30c3\u30c9\u4e00\u89a7)","datePublished":"2017-05-19T06:40:33+00:00","dateModified":"2024-05-06T02:42:33+00:00","mainEntityOfPage":{"@id":"https:\/\/www.sejuku.net\/blog\/23408"},"wordCount":142,"publisher":{"@id":"https:\/\/www.sejuku.net\/blog\/#organization"},"image":{"@id":"https:\/\/www.sejuku.net\/blog\/23408#primaryimage"},"thumbnailUrl":"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2018\/06\/js_object.jpg","keywords":["JavaScript"],"articleSection":["Javascript\u5b66\u7fd2"],"inLanguage":"ja"},{"@type":"WebPage","@id":"https:\/\/www.sejuku.net\/blog\/23408","url":"https:\/\/www.sejuku.net\/blog\/23408","name":"JavaScript\u3067Number\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f7f\u3044\u65b9(\u30d7\u30ed\u30d1\u30c6\u30a3\u3001\u30e1\u30bd\u30c3\u30c9\u4e00\u89a7) | \u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u30d6\u30ed\u30b0","isPartOf":{"@id":"https:\/\/www.sejuku.net\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.sejuku.net\/blog\/23408#primaryimage"},"image":{"@id":"https:\/\/www.sejuku.net\/blog\/23408#primaryimage"},"thumbnailUrl":"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2018\/06\/js_object.jpg","datePublished":"2017-05-19T06:40:33+00:00","dateModified":"2024-05-06T02:42:33+00:00","description":"\u3053\u306e\u8a18\u4e8b\u3067\u306f\u300c JavaScript\u3067Number\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f7f\u3044\u65b9(\u30d7\u30ed\u30d1\u30c6\u30a3\u3001\u30e1\u30bd\u30c3\u30c9\u4e00\u89a7) \u300d\u306b\u3064\u3044\u3066\u3001\u8ab0\u3067\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3092\u8aad\u3081\u3070\u3001\u3042\u306a\u305f\u306e\u60a9\u307f\u304c\u89e3\u6c7a\u3059\u308b\u3060\u3051\u3058\u3083\u306a\u304f\u3001\u65b0\u305f\u306a\u6c17\u4ed8\u304d\u3082\u767a\u898b\u3067\u304d\u308b\u3053\u3068\u3067\u3057\u3087\u3046\u3002\u304a\u60a9\u307f\u306e\u65b9\u306f\u305c\u3072\u3054\u4e00\u8aad\u304f\u3060\u3055\u3044\u3002","breadcrumb":{"@id":"https:\/\/www.sejuku.net\/blog\/23408#breadcrumb"},"inLanguage":"ja","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.sejuku.net\/blog\/23408"]}]},{"@type":"ImageObject","inLanguage":"ja","@id":"https:\/\/www.sejuku.net\/blog\/23408#primaryimage","url":"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2018\/06\/js_object.jpg","contentUrl":"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2018\/06\/js_object.jpg","width":700,"height":400},{"@type":"BreadcrumbList","@id":"https:\/\/www.sejuku.net\/blog\/23408#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.sejuku.net\/blog\/"},{"@type":"ListItem","position":2,"name":"JavaScript\u3067Number\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f7f\u3044\u65b9(\u30d7\u30ed\u30d1\u30c6\u30a3\u3001\u30e1\u30bd\u30c3\u30c9\u4e00\u89a7)"}]},{"@type":"WebSite","@id":"https:\/\/www.sejuku.net\/blog\/#website","url":"https:\/\/www.sejuku.net\/blog\/","name":"\u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u30d6\u30ed\u30b0","description":"\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u5b66\u7fd2\u306e\u3059\u3079\u3066\u304c\u30b3\u30b3\u306b\u3002","publisher":{"@id":"https:\/\/www.sejuku.net\/blog\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.sejuku.net\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"ja"},{"@type":"Organization","@id":"https:\/\/www.sejuku.net\/blog\/#organization","name":"\u682a\u5f0f\u4f1a\u793eSAMURAI","url":"https:\/\/www.sejuku.net\/blog\/","logo":{"@type":"ImageObject","inLanguage":"ja","@id":"https:\/\/www.sejuku.net\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2023\/07\/logo.png","contentUrl":"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2023\/07\/logo.png","width":600,"height":600,"caption":"\u682a\u5f0f\u4f1a\u793eSAMURAI"},"image":{"@id":"https:\/\/www.sejuku.net\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/sejuku2013","https:\/\/x.com\/samuraijuku","https:\/\/www.youtube.com\/channel\/UCCFOQO5aDK0xXam4cUQXT8g\/featured"]},{"@type":"Person","@id":"https:\/\/www.sejuku.net\/blog\/#\/schema\/person\/e8ca7fd09857a736a25e6b4455a3ab61","name":"\u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u7de8\u96c6\u90e8","image":{"@type":"ImageObject","inLanguage":"ja","@id":"https:\/\/secure.gravatar.com\/avatar\/507c280c5c67d2c11fec4fdba20e5bf1ec2fe91f9deb42d2ec50382778b311bf?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/507c280c5c67d2c11fec4fdba20e5bf1ec2fe91f9deb42d2ec50382778b311bf?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/507c280c5c67d2c11fec4fdba20e5bf1ec2fe91f9deb42d2ec50382778b311bf?s=96&d=mm&r=g","caption":"\u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u7de8\u96c6\u90e8"},"description":"\u3010\u30d7\u30ed\u30d5\u30a3\u30fc\u30eb\u3011 DX\u8a8d\u5b9a\u53d6\u5f97\u4e8b\u696d\u8005\u306b\u9078\u5b9a\u3055\u308c\u3066\u3044\u308b\u682a\u5f0f\u4f1a\u793eSAMURAI\u306e\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u30fb\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3\u90e8\u304c\u904b\u55b6\u3002\u300c\u8cea\u306e\u9ad8\u3044IT\u6559\u80b2\u3092\u3001\u3059\u3079\u3066\u306e\u4eba\u306b\u300d\u3092\u30df\u30c3\u30b7\u30e7\u30f3\u306b\u3001IT\u30fb\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u5b66\u3073\u59cb\u3081\u305f\u521d\u5b66\u8005\u306e\u65b9\u306b\u5411\u3051\u8a18\u4e8b\u3092\u57f7\u7b46\u3002 \u7d2f\u8a08\u6307\u5c0e\u8005\u65704\u4e075,000\u540d\u4ee5\u4e0a\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\u300c\u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u300d\u3001\u7d2f\u8a08\u767b\u9332\u8005\u65701\u4e078,000\u4eba\u4ee5\u4e0a\u306e\u30aa\u30f3\u30e9\u30a4\u30f3\u5b66\u7fd2\u30b5\u30fc\u30d3\u30b9\u300c\u4f8d\u30c6\u30e9\u30b3\u30e4\u300d\u3067\u6271\u3046\u6559\u6750\u958b\u767a\u306e\u30ce\u30a6\u30cf\u30a6\u30012013\u5e74\u306e\u5275\u696d\u304b\u3089\u904b\u55b6\u3067\u5f97\u305f\u77e5\u898b\u306b\u57fa\u3065\u304d\u3001\u8a18\u4e8b\u306e\u57f7\u7b46\u3060\u3051\u3067\u306a\u304f\u7de8\u96c6\u30fb\u76e3\u4fee\u3082\u62c5\u5f53\u3057\u3066\u3044\u307e\u3059\u3002 \u3010\u5c02\u9580\u5206\u91ce\u3011 IT\/Web\u958b\u767a\/AI\u30fb\u30ed\u30dc\u30c3\u30c8\u958b\u767a\/\u30a4\u30f3\u30d5\u30e9\u958b\u767a\/\u30b2\u30fc\u30e0\u958b\u767a\/AI\/Web\u30c7\u30b6\u30a4\u30f3","sameAs":["https:\/\/www.sejuku.net\/","https:\/\/www.facebook.com\/sejuku2013\/","https:\/\/www.instagram.com\/samuraiengineer_official\/","https:\/\/x.com\/https:\/\/twitter.com\/samuraijuku","https:\/\/www.youtube.com\/channel\/UCCFOQO5aDK0xXam4cUQXT8g"],"url":"https:\/\/www.sejuku.net\/blog\/author\/samurai-blog"}]}},"_links":{"self":[{"href":"https:\/\/www.sejuku.net\/blog\/wp-json\/wp\/v2\/posts\/23408","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sejuku.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sejuku.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sejuku.net\/blog\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sejuku.net\/blog\/wp-json\/wp\/v2\/comments?post=23408"}],"version-history":[{"count":0,"href":"https:\/\/www.sejuku.net\/blog\/wp-json\/wp\/v2\/posts\/23408\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.sejuku.net\/blog\/wp-json\/wp\/v2\/media\/60566"}],"wp:attachment":[{"href":"https:\/\/www.sejuku.net\/blog\/wp-json\/wp\/v2\/media?parent=23408"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sejuku.net\/blog\/wp-json\/wp\/v2\/categories?post=23408"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sejuku.net\/blog\/wp-json\/wp\/v2\/tags?post=23408"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}