{"id":8934,"date":"2025-03-14T20:21:25","date_gmt":"2025-03-14T11:21:25","guid":{"rendered":"https:\/\/techmania.jp\/blog\/?p=8934"},"modified":"2025-04-22T20:35:44","modified_gmt":"2025-04-22T11:35:44","slug":"javascript-split-string","status":"publish","type":"post","link":"https:\/\/techmania.jp\/blog\/javascript-split-string\/","title":{"rendered":"\u3010JavaScript\u5165\u9580\u3011\u6587\u5b57\u5217\u3092\u5206\u5272\u3057\u3066\u5207\u308a\u51fa\u3059\u65b9\u6cd5\u307e\u3068\u3081\uff01\u5404\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\u3092\u5fb9\u5e95\u89e3\u8aac"},"content":{"rendered":"\n

\u6587\u5b57\u5217\u3092\u6271\u3046\u6642\u306b\u3001\u300c\u5fc5\u8981\u7b87\u6240\u3060\u3051\u6587\u5b57\u3092\u5207\u308a\u51fa\u3057\u305f\u3044\u300d\u3068\u3044\u3046\u30b1\u30fc\u30b9\u3084\u3001\u300c\u7279\u5b9a\u306e\u30d6\u30ed\u30c3\u30af\u3054\u3068\u306b\u6587\u5b57\u5217\u3092\u5206\u5272\u3057\u305f\u3044\u300d\u3068\u3044\u3063\u305f\u30b1\u30fc\u30b9\u304c\u767a\u751f\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002
JavaScript\u306b\u306f\u3001\u305d\u3046\u3057\u305f\u30b1\u30fc\u30b9\u306b\u5bfe\u5fdc\u3059\u308b\u65b9\u6cd5\u3068\u3057\u3066\u3001\u6587\u5b57\u5217\u306e\u5206\u5272\u30fb\u5207\u308a\u51fa\u3057\u3092\u884c\u3046\u305f\u3081\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u3044\u304f\u3064\u304b\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

\u4eca\u56de\u306e\u8a18\u4e8b\u3067\u306f\u3001\u305d\u308c\u305e\u308c\u306e\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\u3084\u6ce8\u610f\u70b9\u306a\u3069\u306b\u3064\u3044\u3066\u3001\u8a73\u3057\u304f\u89e3\u8aac\u3092\u3057\u3066\u3044\u304d\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

JavaScript\u3067\u6587\u5b57\u5217\u3092\u90e8\u5206\u7684\u306b\u5206\u5272\u30fb\u5207\u308a\u51fa\u3059\u65b9\u6cd5\u306f\uff1f<\/h2>\n\n\n\n

JavaScript\u3067\u306f\u3001\u6587\u5b57\u5217\u3092\u90e8\u5206\u7684\u306b\u5206\u5272\u3057\u305f\u308a\u5207\u308a\u51fa\u3057\u305f\u308a\u3059\u308b\u305f\u3081\u306e\u30e1\u30bd\u30c3\u30c9\u3068\u3057\u3066\u300csubstring\u300d\u300cslice\u300d\u300csplit\u300d\u306a\u3069\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

\u307e\u305a\u306f\u3001\u4efb\u610f\u306e\u7bc4\u56f2\u3067\u6587\u5b57\u5217\u3092\u5207\u308a\u51fa\u3059\u65b9\u6cd5\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002
\u30e1\u30bd\u30c3\u30c9\u3054\u3068\u306e\u7279\u5fb4\u3084\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u3001\u9806\u306b\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

substring\u30e1\u30bd\u30c3\u30c9\u3067\u6587\u5b57\u5217\u306e\u5206\u5272\u30fb\u5207\u308a\u51fa\u3057\u3092\u3059\u308b<\/h3>\n\n\n\n

1\u3064\u76ee\u306f\u3001\u300csubstring\u300d\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3084\u308a\u65b9\u306b\u3064\u3044\u3066\u3067\u3059\u3002
substring\u30e1\u30bd\u30c3\u30c9\u3067\u306f\u3001\u5bfe\u8c61\u306e\u6587\u5b57\u5217\u306b\u5bfe\u3057\u3066\u7bc4\u56f2\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u305d\u306e\u4f4d\u7f6e\u306b\u3042\u308b\u6587\u5b57\u5217\u3092\u7d50\u679c\u3068\u3057\u3066\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

\u57fa\u672c\u69cb\u6587\u306f\u6b21\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

\u3010\u57fa\u672c\u69cb\u6587\u3011<\/strong><\/p>\n\n\n\n

\u6587\u5b57\u5217.substring(\u958b\u59cb\u4f4d\u7f6e, \u7d42\u4e86\u4f4d\u7f6e);<\/code><\/pre><\/div>\n\n\n\n
\u5207\u308a\u51fa\u3057\u3092\u958b\u59cb\u3059\u308b\u4f4d\u7f6e\u3068\u7d42\u4e86\u3059\u308b\u4f4d\u7f6e\u3092\u3001\u305d\u308c\u305e\u308c\u30e1\u30bd\u30c3\u30c9\u306e\u5f15\u6570\u306b\u6307\u5b9a\u3057\u307e\u3059\u3002
\u6307\u5b9a\u3057\u305f\u4f4d\u7f6e\u306e\u9593\u306b\u3042\u308b\u6587\u5b57\u304c\u3001\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u3068\u3057\u3066\u8fd4\u5374\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\u4ee5\u4e0b\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n
const str = "Hello,World!";\nconst result = str.substring(0, 5);\nconsole.log(result);<\/code><\/pre><\/div>\n\n\n\n
\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n
Hello<\/code><\/pre>\n\n\n\n
substring\u30e1\u30bd\u30c3\u30c9\u306e1\u3064\u76ee\u306e\u6ce8\u610f\u70b9\u3068\u3057\u3066\u3001\u6587\u5b57\u306e\u4f4d\u7f6e\u3092\u793a\u3059\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7\uff08\u5f15\u6570\u306b\u6e21\u3059\u6570\u5024\uff09\u306f\u30011\u304b\u3089\u3067\u306f\u306a\u304f0\u304b\u3089\u6570\u3048\u307e\u3059\u3002
\u4f8b\u3048\u3070\u3001\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u306e\u5834\u5408\u306f\u300cH\u300d\u304c1\u6587\u5b57\u76ee\u306b\u3042\u305f\u308a\u307e\u3059\u304c\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7\u306f0\u756a\u304c\u5272\u308a\u632f\u3089\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u958b\u59cb\u4f4d\u7f6e\u306b1\u3092\u6307\u5b9a\u3059\u308b\u3068\u305d\u306e\u6b21\u306e\u300ce\u300d\u304b\u3089\u6587\u5b57\u304c\u53d6\u5f97\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002
\u958b\u59cb\u4f4d\u7f6e\u306b\u6307\u5b9a\u3059\u308b\u6570\u5024\u306f\u3001\u5b9f\u969b\u306e\u6587\u5b57\u6570\u306e\u9806\u756a\u304b\u30891\u3092\u5f15\u3044\u305f\u6570\u3092\u6307\u5b9a\u3059\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002
\u307e\u305f\u3001\u7d42\u4e86\u4f4d\u7f6e\u306b\u6307\u5b9a\u3057\u305f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7\u306e\u6587\u5b57\u306f\u53d6\u5f97\u5185\u5bb9\u306b\u542b\u307e\u308c\u306a\u3044\u305f\u3081\u3001\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n
\u306a\u304a\u3001\u7d42\u4e86\u4f4d\u7f6e\u306b\u3064\u3044\u3066\u306f\u7701\u7565\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3001\u305d\u306e\u5834\u5408\u306f\u958b\u59cb\u4f4d\u7f6e\u304b\u3089\u672b\u5c3e\u307e\u3067\u306e\u6587\u5b57\u304c\u53d6\u5f97\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n
const str = "Hello,World!";\nconst result = str.substring(6);\nconsole.log(result);<\/code><\/pre><\/div>\n\n\n\n
\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n
World!<\/code><\/pre>\n\n\n\n
2\u3064\u76ee\u306e\u6ce8\u610f\u70b9\u3068\u3057\u3066\u3001\u7d42\u4e86\u4f4d\u7f6e\u306e\u6570\u5024\u304c\u958b\u59cb\u4f4d\u7f6e\u3088\u308a\u3082\u5c0f\u3055\u304b\u3063\u305f\u5834\u5408\u3001substring\u30e1\u30bd\u30c3\u30c9\u3067\u306f\u81ea\u52d5\u3067\u6570\u5024\u306e\u53cd\u8ee2\u304c\u884c\u308f\u308c\u307e\u3059\u3002
\u4f7f\u7528\u3059\u308b\u30b1\u30fc\u30b9\u306b\u3088\u3063\u3066\u306f\u3001\u610f\u56f3\u305b\u306c\u4e0d\u5177\u5408\u3092\u751f\u3080\u539f\u56e0\u306b\u3082\u306a\u308a\u304b\u306d\u306a\u3044\u305f\u3081\u3001\u5024\u306e\u6307\u5b9a\u306b\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n
\u307e\u305f\u3001\u6307\u5b9a\u3057\u305f\u5024\u304c\u8ca0\u306e\u6570\u3060\u3063\u305f\u5834\u5408\u306b\u306f\u3001\u300c0\u300d\u3092\u6307\u5b9a\u3057\u305f\u3082\u306e\u3068\u3057\u3066\u6271\u308f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n
const str = "Hello,World!";\n\n\/\/ \u30de\u30a4\u30ca\u30b9\u5024\u306f\uff10\u306b\u306a\u308b\nconst result1 = str.substring(-2, 5);\n\n\/\/ \u7d42\u4e86\u4f4d\u7f6e\u306e\u65b9\u304c\u5c0f\u3055\u3044\u5834\u5408\u306f\u6570\u5024\u304c\u53cd\u8ee2\u3059\u308b\nconst result2 = str.substring(12, 6);\n\nconsole.log(result1);\nconsole.log(result2);<\/code><\/pre><\/div>\n\n\n\n
\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n
Hello\nWorld!<\/code><\/pre>\n\n\n\n
\u5024\u306e\u6b63\u8ca0\u3084\u5927\u5c0f\u306b\u3088\u308b\u52d5\u4f5c\u306e\u9055\u3044\u306f\u30e1\u30bd\u30c3\u30c9\u3054\u3068\u306b\u5909\u308f\u308b\u306e\u3067\u3001\u4f7f\u7528\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u306e\u7279\u5fb4\u3092\u3057\u3063\u304b\u308a\u3068\u899a\u3048\u3066\u304a\u304f\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n
slice\u30e1\u30bd\u30c3\u30c9\u3067\u6587\u5b57\u5217\u306e\u5206\u5272\u30fb\u5207\u308a\u51fa\u3057\u3092\u3059\u308b<\/h3>\n\n\n\n
\u7d9a\u3044\u3066\u306f\u3001\u300cslice\u300d\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u305f\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u57fa\u672c\u7684\u306a\u6a5f\u80fd\u306fsubstring\u30e1\u30bd\u30c3\u30c9\u3068\u540c\u3058\u3067\u3001\u958b\u59cb\u4f4d\u7f6e\u3068\u7d42\u4e86\u4f4d\u7f6e\u3067\u6307\u5b9a\u3057\u305f\u7bc4\u56f2\u5185\u306e\u6587\u5b57\u3092\u7d50\u679c\u3068\u3057\u3066\u8fd4\u3057\u3066\u304f\u308c\u308b\u30e1\u30bd\u30c3\u30c9\u306b\u306a\u308a\u307e\u3059\u3002
\u57fa\u672c\u69cb\u6587\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n\n\n\n
\u3010\u57fa\u672c\u69cb\u6587\u3011<\/strong><\/p>\n\n\n\n
\u6587\u5b57\u5217.slice(\u958b\u59cb\u4f4d\u7f6e, \u7d42\u4e86\u4f4d\u7f6e);<\/code><\/pre><\/div>\n\n\n\n
\u7d42\u4e86\u4f4d\u7f6e\u306e\u6587\u5b57\u304c\u53d6\u5f97\u5185\u5bb9\u306b\u542b\u307e\u308c\u306a\u3044\u70b9\u3084\u3001\u7d42\u4e86\u4f4d\u7f6e\u3092\u7701\u7565\u3067\u304d\u308b\u70b9\u3082substring\u30e1\u30bd\u30c3\u30c9\u3068\u540c\u69d8\u3067\u3059\u3002
\u4ee5\u4e0b\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u3001\u5b9f\u969b\u306e\u52d5\u304d\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n
const str = "Hello,World!";\n\nconst result1 = str.slice(0, 5);\nconst result2 = str.slice(6);\n\nconsole.log(result1);\nconsole.log(result2);<\/code><\/pre><\/div>\n\n\n\n
\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n
Hello\nWorld!<\/code><\/pre>\n\n\n\n
\u5148\u307b\u3069\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u306e\u4e00\u90e8\u3092slice\u30e1\u30bd\u30c3\u30c9\u306b\u7f6e\u304d\u63db\u3048\u3066\u307f\u307e\u3057\u305f\u304c\u3001\u5b9f\u884c\u7d50\u679c\u306b\u306f\u540c\u3058\u6587\u5b57\u5217\u304c\u51fa\u529b\u3055\u308c\u3066\u3044\u307e\u3059\u3002
\u3053\u306e\u3088\u3046\u306b\u3001\u57fa\u672c\u7684\u306a\u52d5\u4f5c\u306b\u3064\u3044\u3066\u306fsubstring\u30e1\u30bd\u30c3\u30c9\u3068slice\u30e1\u30bd\u30c3\u30c9\u306b\u9055\u3044\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n
2\u3064\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u7570\u306a\u308b\u70b9\u306f\u3001\u5f15\u6570\u306b\u8ca0\u306e\u6570\u3092\u6307\u5b9a\u3057\u305f\u5834\u5408\u306e\u6319\u52d5\u304c\u9055\u3046\u3053\u3068\u3067\u3059\u3002
substring\u30e1\u30bd\u30c3\u30c9\u3067\u306f\u5024\u304c\u81ea\u52d5\u3067\u300c0\u300d\u306b\u7f6e\u304d\u63db\u3048\u3089\u308c\u3066\u3044\u307e\u3057\u305f\u304c\u3001slice\u30e1\u30bd\u30c3\u30c9\u3067\u8ca0\u306e\u6570\u3092\u6307\u5b9a\u3057\u305f\u5834\u5408\u3001\u6587\u5b57\u5217\u5168\u4f53\u306e\u6587\u5b57\u6570\u304b\u3089\u5024\u3092\u5f15\u3044\u305f\u6570\u306b\u5909\u63db\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n
const str = "Hello,World!";\n\nconsole.log("\u6587\u5b57\u6570\uff1a" + str.length);\n\nconst result1 = str.slice(-12, -7);\nconst result2 = str.slice(-6);\n\nconsole.log(result1);\nconsole.log(result2);<\/code><\/pre><\/div>\n\n\n\n
\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n
\u6587\u5b57\u6570\uff1a12\nHello\nWorld!<\/code><\/pre>\n\n\n\n
\u53d6\u5f97\u7d50\u679c\u3092\u898b\u308b\u3068\u3001\u305d\u308c\u305e\u308c\u6587\u5b57\u6570\u304b\u3089\u5024\u3092\u5f15\u3044\u305f\u6570\u5024\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u308b\u306e\u304c\u5206\u304b\u308b\u3068\u601d\u3044\u307e\u3059\u3002
substring\u30e1\u30bd\u30c3\u30c9\u306e\u5834\u5408\u3068\u306f\u6319\u52d5\u304c\u7570\u306a\u308b\u306e\u3067\u3001\u4f7f\u7528\u306e\u969b\u306b\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n
\u307e\u305f\u3001\u7d42\u4e86\u4f4d\u7f6e\u304c\u958b\u59cb\u4f4d\u7f6e\u3088\u308a\u5c0f\u3055\u3044\u6570\u5024\u3060\u3063\u305f\u5834\u5408\u306b\u3082\u3001\u305d\u308c\u305e\u308c\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u6319\u52d5\u304c\u7570\u306a\u308a\u307e\u3059\u3002
\u5b9f\u969b\u306b\u52d5\u304d\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n
const str = "Hello,World!";\n\n\/\/ substring\u30e1\u30bd\u30c3\u30c9\u306e\u5834\u5408\nconst resultSubstr = str.substring(5, 0);\n\n\/\/ slice\u30e1\u30bd\u30c3\u30c9\u306e\u5834\u5408\nconst resultSlice = str.slice(5, 0);\n\nconsole.log(resultSubstr);\nconsole.log(resultSlice);<\/code><\/pre><\/div>\n\n\n\n
\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n
Hello<\/code><\/pre>\n\n\n\n
substring\u30e1\u30bd\u30c3\u30c9\u306e\u5834\u5408\u306f\u6570\u5024\u304c\u81ea\u52d5\u3067\u53cd\u8ee2\u3055\u308c\u308b\u306e\u306b\u5bfe\u3057\u3001slice\u30e1\u30bd\u30c3\u30c9\u306f\u5165\u529b\u3057\u305f\u6570\u5024\u306e\u307e\u307e\u5207\u308a\u51fa\u3057\u3092\u884c\u304a\u3046\u3068\u3057\u307e\u3059\u3002\u305d\u306e\u7d50\u679c\u3001\u7bc4\u56f2\u304c\u6b63\u5e38\u306b\u6307\u5b9a\u3055\u308c\u305a\u7a7a\u6587\u5b57\u304c\u8fd4\u5374\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
\u6570\u5024\u306b\u3088\u3063\u3066\u7d50\u679c\u304c\u5909\u5316\u3057\u3066\u3057\u307e\u3046substring\u30e1\u30bd\u30c3\u30c9\u306b\u6bd4\u3079\u3001\u5fc5\u305a\u7a7a\u6587\u5b57\u304c\u8fd4\u5374\u3055\u308c\u308b\u3068\u3044\u3046\u70b9\u306f\u30e1\u30ea\u30c3\u30c8\u306b\u3082\u306a\u308b\u306e\u3067\u3001\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3044\u5206\u3051\u308b\u3068\u3044\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
1\u6587\u5b57\u305a\u3064\u5206\u5272\u30fb\u5207\u308a\u51fa\u3057\u3092\u3059\u308b\u65b9\u6cd5<\/h2>\n\n\n\n
\u5148\u307b\u3069\u89e3\u8aac\u3057\u305f2\u3064\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u4e00\u5b9a\u7bc4\u56f2\u306e\u6587\u5b57\u3092\u5207\u308a\u51fa\u3059\u306e\u306b\u5f79\u7acb\u3064\u3082\u306e\u3067\u3057\u305f\u3002
\u3053\u3053\u304b\u3089\u306f\u3001\u5358\u4f53\u306e\u6587\u5b57\u3092\u5207\u308a\u51fa\u3059\u306e\u306b\u4f7f\u3048\u308b\u30e1\u30bd\u30c3\u30c9\u3092\u7d39\u4ecb\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
charAt\u30e1\u30bd\u30c3\u30c9\u30671\u6587\u5b57\u305a\u3064\u62bd\u51fa\u3059\u308b<\/h3>\n\n\n\n
\u307e\u305a\u306f\u3001\u300ccharAt\u300d\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002
charAt\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u5bfe\u8c61\u306e\u6587\u5b57\u5217\u306b\u5bfe\u3057\u3066\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7\uff08\u6587\u5b57\u4f4d\u7f6e\uff09\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u5bfe\u5fdc\u3059\u308b\u7b87\u6240\u306e1\u6587\u5b57\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002<\/p>\n\n\n\n
\u4f7f\u7528\u3059\u308b\u969b\u306e\u57fa\u672c\u69cb\u6587\u306f\u6b21\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u3010\u57fa\u672c\u69cb\u6587\u3011<\/strong><\/p>\n\n\n\n
\u6587\u5b57\u5217.charAt(\u6587\u5b57\u4f4d\u7f6e);<\/code><\/pre><\/div>\n\n\n\n
substring\u30e1\u30bd\u30c3\u30c9\u3084slice\u30e1\u30bd\u30c3\u30c9\u3068\u306f\u7570\u306a\u308a\u3001\u6307\u5b9a\u306e1\u6587\u5b57\u306e\u307f\u3092\u5207\u308a\u51fa\u3059\u30e1\u30bd\u30c3\u30c9\u3067\u3042\u308b\u305f\u3081\u3001\u5f15\u6570\u306b\u6e21\u3059\u5024\u30821\u3064\u306e\u307f\u3068\u306a\u308a\u307e\u3059\u3002
\u4ee5\u4e0b\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u3001\u5b9f\u969b\u306e\u52d5\u304d\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n
const str = "Hello,World!";\nconst result = str.charAt(0);\nconsole.log(result);<\/code><\/pre><\/div>\n\n\n\n
\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n
H<\/code><\/pre>\n\n\n\n
\u30e1\u30bd\u30c3\u30c9\u306e\u5f15\u6570\u306f\u7701\u7565\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002\u305d\u306e\u5834\u5408\u306f\u3001\u300c0\u300d\u3092\u6307\u5b9a\u3057\u305f\u3082\u306e\u3068\u3057\u3066\u52d5\u4f5c\u3057\u307e\u3059\u3002
\u307e\u305f\u3001\u6307\u5b9a\u3057\u305f\u6570\u5024\u304c\u6587\u5b57\u5217\u306e\u7dcf\u6570\u3092\u8d85\u3048\u308b\u5834\u5408\u3084\u3001\u8ca0\u306e\u6570\u3092\u6307\u5b9a\u3057\u305f\u5834\u5408\u306b\u306f\u3001\u7a7a\u6587\u5b57\u304c\u8fd4\u5374\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
charAt\u30e1\u30bd\u30c3\u30c9\u3092\u3001\u5168\u4f53\u306e\u6587\u5b57\u6570\u3092\u53d6\u5f97\u3059\u308b\u300clength\u300d\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u7528\u3059\u308b\u3068\u3001\u6587\u5b57\u6570\u306b\u95a2\u308f\u3089\u305a\u81ea\u52d5\u3067\u672b\u5c3e\u306e\u6587\u5b57\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002
\u3053\u306e\u65b9\u6cd5\u306f\u3001\u4ed6\u306e\u30e1\u30bd\u30c3\u30c9\u306b\u3082\u5fdc\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n
const str = "Hello,World!";\nconst result = str.charAt(str.length - 1);\nconsole.log(result);<\/code><\/pre><\/div>\n\n\n\n
\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n
!<\/code><\/pre>\n\n\n\n
\u7279\u5b9a\u306e\u6587\u5b57\u306e\u6570\u3092\u6570\u3048\u305f\u308a\u306a\u3069\u3001\u5404\u6587\u5b57\u306b\u5bfe\u3057\u3066\u51e6\u7406\u3092\u884c\u3044\u305f\u3044\u5834\u5408\u306f\u3001\u30eb\u30fc\u30d7\u51e6\u7406\u3068\u5408\u308f\u305b\u3066\u4f7f\u7528\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n
let str = "Hello,World!";\nlet count = 0;\n\nfor (let i = 0; i < str.length; i++) {\n    if (str.charAt(i) === 'l') {\n        count++;\n    }\n}\n\nconsole.log("\u300cl\u300d\u306e\u500b\u6570\uff1a" + count); <\/code><\/pre><\/div>\n\n\n\n
\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n
\u300cl\u300d\u306e\u500b\u6570\uff1a3<\/code><\/pre>\n\n\n\n
\u306a\u304a\u3001JavaScript\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u304cES6\u4ee5\u964d\u3067\u3042\u308c\u3070\u3001charAt\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u4ee3\u308f\u308a\u306b\u914d\u5217\u3068\u540c\u3058\u3088\u3046\u306a\u65b9\u6cd5\u3067\u6587\u5b57\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n
const str = "Hello,World!";\nconsole.log(str[0]);<\/code><\/pre><\/div>\n\n\n\n
\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n
H<\/code><\/pre>\n\n\n\n
\u305f\u3060\u3057\u3001\u3053\u306e\u65b9\u6cd5\u3092\u4f7f\u7528\u3057\u3066\u6587\u5b57\u3092\u53d6\u5f97\u3059\u308b\u5834\u5408\u3001\u7bc4\u56f2\u5916\u306e\u6570\u5024\u3092\u6307\u5b9a\u3059\u308b\u3068\u7a7a\u6587\u5b57\u3067\u306f\u306a\u304f\u300cundefined\u300d\u304c\u8fd4\u5374\u3055\u308c\u308b\u306e\u3067\u3001\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n
codePointAt\u30e1\u30bd\u30c3\u30c9\u3067\u5b8c\u5168\u306a\u5f62\u30671\u6587\u5b57\u305a\u3064\u62bd\u51fa\u3059\u308b<\/h3>\n\n\n\n
\u5358\u4f53\u306e\u6587\u5b57\u3092\u5207\u308a\u51fa\u3059\u306e\u306b\u4f7f\u7528\u3067\u304d\u308bcharAt\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u304c\u3001\u5b9f\u306f\u30b1\u30fc\u30b9\u306b\u3088\u3063\u3066\u306f\u4e0a\u624b\u304f\u6587\u5b57\u304c\u53d6\u5f97\u3067\u304d\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002
\u307e\u305a\u306f\u3001\u4ee5\u4e0b\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n
const str = "\ud867\ude3d";\nconst result = str.charAt(0);\nconsole.log(result);<\/code><\/pre><\/div>\n\n\n\n
\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n
\ufffd<\/code><\/pre>\n\n\n\n
\u5b9f\u884c\u7d50\u679c\u3092\u898b\u308b\u3068\u3001\u6587\u5b57\u304c\u6b63\u5e38\u306b\u53d6\u5f97\u3055\u308c\u3066\u3044\u306a\u3044\u306e\u304c\u5206\u304b\u308a\u307e\u3059\u3002
\u3053\u306e\u4e0d\u5177\u5408\u306f\u3001\u53d6\u5f97\u5bfe\u8c61\u304c\u300c\u30b5\u30ed\u30b2\u30fc\u30c8\u30da\u30a2\u300d\u3068\u547c\u3070\u308c\u308b\u6587\u5b57\u3067\u3042\u308b\u305f\u3081\u306b\u767a\u751f\u3057\u3066\u3044\u308b\u3082\u306e\u3067\u3059\u3002<\/p>\n\n\n\n
JavaScript\u306f\u3001\u6587\u5b57\u30b3\u30fc\u30c9\u306bUnicode\u3092\u63a1\u7528\u3057\u3066\u3044\u307e\u3059\u3002
Unicode\u3067\u306f\u3001\u5168\u3066\u306e\u6587\u5b57\u306b\u5bfe\u3057\u3066\u4e00\u610f\u306e\u756a\u53f7\u304c\u5272\u308a\u632f\u3089\u308c\u3066\u304a\u308a\u3001\u3053\u306e\u756a\u53f7\u306e\u3053\u3068\u3092Code Point\uff08\u7b26\u53f7\u4f4d\u7f6e\uff09\u3068\u547c\u3073\u307e\u3059\u3002<\/p>\n\n\n\n
\u4e00\u65b9\u3001Unicode\u3092\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u304c\u6271\u3046\u969b\u306b\u306f\u7b26\u53f7\u5316\uff08\u30a8\u30f3\u30b3\u30fc\u30c9\uff09\u304c\u884c\u308f\u308c\u307e\u3059\u304c\u30011\u6587\u5b57\u3092\u4f55bit\u5358\u4f4d\u3067\u8868\u73fe\u3059\u308b\u304b\u306b\u3088\u3063\u3066\u3001\u3044\u304f\u3064\u304b\u306e\u65b9\u5f0f\u306b\u5206\u304b\u308c\u307e\u3059\u3002JavaScript\u3067\u63a1\u7528\u3055\u308c\u3066\u3044\u308b\u306e\u306f\u300116bit\u5358\u4f4d\u3067\u8868\u73fe\u3059\u308bUTF-16\u3067\u3059\u3002
\u7b26\u53f7\u5316\u3055\u308c\u305f\u6587\u5b57\u30b3\u30fc\u30c9\u306e\u3053\u3068\u3092Code Unit\uff08\u7b26\u53f7\u5358\u4f4d\uff09\u3068\u547c\u3073\u3001\u57fa\u672c\u7684\u306b\u306f1\u3064\u306eCode Unit\u30671\u6587\u5b57\u304c\u8868\u73fe\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n
\/\/ Code Unit\u3092\u53d6\u5f97\nconst result = "\u3042".charCodeAt(0).toString(16);\n\nconsole.log(result);\n\n\/\/ \u540c\u3058Code Unit\u3067\u6587\u5b57\u3092\u8868\u793a\nconsole.log("\\u3042");<\/code><\/pre><\/div>\n\n\n\n
\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n
3042\n\u3042<\/code><\/pre>\n\n\n\n
\u3053\u306e\u65b9\u6cd5\u3067\u8868\u73fe\u3067\u304d\u308b\u6587\u5b57\u306e\u7a2e\u985e\u306f6\u4e075536\u7a2e\u985e\u307e\u3067\u3067\u3059\u304c\u3001\u73fe\u72b6Unicode\u306b\u767b\u9332\u3055\u308c\u3066\u3044\u308b\u6587\u5b57\u306f10\u4e07\u7a2e\u985e\u3092\u8d85\u3048\u3066\u3044\u308b\u305f\u3081\u3001\u5168\u3066\u306e\u6587\u5b57\u309216bit\u306e\u307f\u3067\u8868\u73fe\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002
\u305d\u3053\u3067\u3001\u65e2\u5b58\u306e\u65b9\u5f0f\u3092\u6b8b\u3057\u305f\u307e\u307e\u306b\u6587\u5b57\u3092\u8868\u73fe\u3059\u308b\u65b9\u6cd5\u3068\u3057\u3066\u8003\u3048\u3089\u308c\u305f\u306e\u304c\u3001\u30b5\u30ed\u30b2\u30fc\u30c8\u30da\u30a2\u3067\u3059\u3002<\/p>\n\n\n\n
UTF-16\u3067\u306f\u3001Unicode\u4e0a\u3067\u6587\u5b57\u304c\u672a\u5272\u308a\u5f53\u3066\u3068\u306a\u3063\u3066\u3044\u308b\u9818\u57df\uff08\u30b5\u30ed\u30b2\u30fc\u30c8\u9818\u57df\uff09\u3092\u78ba\u4fdd\u3057\u3066\u304a\u308a\u3001\u300c\\uD800\uff5e\\uDBFF\u300d\u306e\u7bc4\u56f2\u3092\u4e0a\u4f4d\u30b5\u30ed\u30b2\u30fc\u30c8\u3001\u300c\\uDC00\uff5e\\uDFFF\u300d\u306e\u7bc4\u56f2\u3092\u4e0b\u4f4d\u30b5\u30ed\u30b2\u30fc\u30c8\u3068\u547c\u3073\u307e\u3059\u3002
\u30b5\u30ed\u30b2\u30fc\u30c8\u30da\u30a2\u306f\u3001\u3053\u306e2\u3064\u306e\u9818\u57df\u304b\u30891\u3064\u305a\u3064Code Point\u3092\u9078\u629e\u3057\u3001\u305d\u306e\u7d44\u307f\u5408\u308f\u305b\u306b\u3088\u3063\u30661\u3064\u306e\u6587\u5b57\u3092\u8868\u73fe\u3059\u308b\u65b9\u6cd5\u306e\u3053\u3068\u3092\u6307\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u4f8b\u3048\u3070\u3001\u5148\u307b\u3069\u306e\u300c\ud867\ude3d\u300d\u3092Code Unit\u3067\u8868\u3059\u5834\u5408\u3001\u300c\\uD867\u300d\u3068\u300c\\uDE3D\u300d\u306e\u7d44\u307f\u5408\u308f\u305b\u3067\u8868\u73fe\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u3010\u30b5\u30ed\u30b2\u30fc\u30c8\u30da\u30a2\u306e\u8868\u73fe\u4f8b\u3011<\/strong><\/p>\n\n\n\n
console.log("\\uD867\\uDE3D"); \/\/ => \ud867\ude3d<\/code><\/pre><\/div>\n\n\n\n
charAt\u30e1\u30bd\u30c3\u30c9\u3067\u30b5\u30ed\u30b2\u30fc\u30c8\u30da\u30a2\u306b\u5bfe\u5fdc\u3067\u304d\u306a\u3044\u306e\u306f\u300116bit\u5358\u4f4d\u3067\u6587\u5b57\u6570\u3092\u5224\u65ad\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u306e\u4ed5\u69d8\u4e0a\u3001\u7247\u65b9\u306eCode Unit\u306e\u307f\u3057\u304b\u5207\u308a\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u306a\u3044\u304b\u3089\u3067\u3059\u3002\u5358\u4f53\u3067\u306f\u6587\u5b57\u3068\u3057\u3066\u306e\u610f\u5473\u3092\u6301\u305f\u306a\u3044\u305f\u3081\u3001\u6b63\u5e38\u306b\u5024\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n\n\n\n
\u30b5\u30ed\u30b2\u30fc\u30c8\u30da\u30a2\u3092\u542b\u3080\u6587\u5b57\u5217\u3092\u6271\u3044\u305f\u3044\u5834\u5408\u306f\u3001codePointAt\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u6587\u5b57\u306e\u53d6\u5f97\u3092\u884c\u3044\u307e\u3057\u3087\u3046\u3002
\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u306f\u3001\u5bfe\u8c61\u306e\u6587\u5b57\u306b\u5272\u308a\u632f\u3089\u308c\u3066\u3044\u308bCode Point\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n
\/\/ 10\u9032\u6570\u3067Code Point\u3092\u53d6\u5f97\nconst result1 = str.codePointAt(0);\n\n\/\/ 16\u9032\u6570\u3067Code Point\u3092\u53d6\u5f97\nconst result2 = str.codePointAt(0).toString(16);\n\nconsole.log(result1);\nconsole.log(result2);\n\n\/\/ fromCodePoint\u30e1\u30bd\u30c3\u30c9\u3067\u300110\u9032\u6570\u306eCode Pont\u3092\u4f7f\u3063\u3066\u6587\u5b57\u8868\u793a\u3082\u53ef\u80fd\nconsole.log(String.fromCodePoint(result1));<\/code><\/pre><\/div>\n\n\n\n
\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n
171581\n29e3d\n\ud867\ude3d<\/code><\/pre>\n\n\n\n
\u305f\u3060\u3057\u3001codePointAt\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u3001\u6587\u5b57\u5217\u306b\u5bfe\u3057\u3066\u76f4\u63a5\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u306f\u304a\u3059\u3059\u3081\u3057\u307e\u305b\u3093\u3002
\u5148\u307b\u3069\u3082\u8aac\u660e\u3057\u305f\u901a\u308a\u3001\u6587\u5b57\u6570\u306f\u57fa\u672c\u7684\u306b16bit\u5358\u4f4d\u3054\u3068\u306b1\u6587\u5b57\u3068\u6570\u3048\u3089\u308c\u308b\u305f\u3081\u3001\u30b5\u30ed\u30b2\u30fc\u30c8\u30da\u30a2\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u5074\u3067\u306f2\u6587\u5b57\u3068\u3057\u3066\u5224\u65ad\u3055\u308c\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7\u30821\u6587\u5b57\u306b\u3064\u304d2\u3064\u5272\u308a\u632f\u3089\u308c\u3066\u3044\u308b\u306e\u3067\u3059\u3002
\u6307\u5b9a\u3057\u305f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7\u304c\u4e0a\u4f4d\u30b5\u30ed\u30b2\u30fc\u30c8\u306e\u3082\u306e\u3067\u3042\u308c\u3070\u6b63\u5e38\u306b\u5024\u304c\u53d6\u5f97\u3067\u304d\u307e\u3059\u304c\u3001\u4e0b\u4f4d\u30b5\u30ed\u30b2\u30fc\u30c8\u306e\u3082\u306e\u3060\u3063\u305f\u5834\u5408\u306f\u3001charAt\u30e1\u30bd\u30c3\u30c9\u3068\u540c\u69d8\u306e\u7d50\u679c\u304c\u8d77\u304d\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
codePointAt\u30e1\u30bd\u30c3\u30c9\u3067\u6587\u5b57\u5217\u3092\u6271\u3046\u5834\u5408\u306f\u3001for\u2026of \u6587\u3084\u30b9\u30d7\u30ec\u30c3\u30c9\u69cb\u6587\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u3046\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n
    let str = "\ud83c\udf4e\ud867\ude3d";\n\n    \/\/ for...of\u6587\u306e\u5834\u5408\n    for (const point of str) {\n\n        let codePoint1 = point.codePointAt(0);\n        console.log(String.fromCodePoint(codePoint1));\n\n    }\n    \/\/ \u30b9\u30d7\u30ec\u30c3\u30c9\u69cb\u6587\u306e\u5834\u5408\n    let arr = [...str]\n\n    let codePoint2 = arr[0].codePointAt(0);\n    let codePoint3 = arr[1].codePointAt(0);\n\n    console.log(String.fromCodePoint(codePoint2));\n    console.log(String.fromCodePoint(codePoint3));<\/code><\/pre><\/div>\n\n\n\n
\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n
\ud83c\udf4e\n\ud867\ude3d\n\ud83c\udf4e\n\ud867\ude3d<\/code><\/pre>\n\n\n\n
split\u30e1\u30bd\u30c3\u30c9\u3067\u5206\u5272\u3057\u305f\u6587\u5b57\u5217\u3092\u914d\u5217\u306b\u683c\u7d0d\u3059\u308b<\/h2>\n\n\n\n
\u6700\u5f8c\u306b\u3001\u300csplit\u300d\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u305f\u5206\u5272\u65b9\u6cd5\u306b\u3064\u3044\u3066\u7d39\u4ecb\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u3053\u308c\u307e\u3067\u7d39\u4ecb\u3057\u3066\u304d\u305f\u30e1\u30bd\u30c3\u30c9\u306f\u3044\u305a\u308c\u3082\u3001\u6307\u5b9a\u3057\u305f\u7bc4\u56f2\u306e\u6587\u5b57\u3092\u5207\u308a\u51fa\u3059\u305f\u3081\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u3057\u305f\u304c\u3001split\u30e1\u30bd\u30c3\u30c9\u306f\u6307\u5b9a\u306e\u6587\u5b57\u3092\u57fa\u6e96\u306b\u6587\u5b57\u5217\u3092\u533a\u5207\u308b\u30e1\u30bd\u30c3\u30c9\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u306f\u914d\u5217\u3068\u306a\u3063\u3066\u304a\u308a\u3001\u533a\u5207\u3063\u305f\u5f8c\u306e\u5404\u30d6\u30ed\u30c3\u30af\u304c\u914d\u5217\u306e\u8981\u7d20\u3068\u3057\u3066\u683c\u7d0d\u3055\u308c\u3066\u3044\u307e\u3059\u3002
\u5207\u308a\u51fa\u3057\u305f\u6587\u5b57\u306e\u307f\u304c\u8fd4\u5374\u3055\u308c\u3066\u3044\u305f\u3053\u308c\u307e\u3067\u306e\u30e1\u30bd\u30c3\u30c9\u3068\u7570\u306a\u308a\u3001\u623b\u308a\u5024\u306e\u914d\u5217\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u6307\u5b9a\u3057\u305f\u533a\u5207\u308a\u6587\u5b57\u4ee5\u5916\u306e\u5168\u3066\u306e\u6587\u5b57\u3092\u53d6\u308a\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
split\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u69cb\u6587\u306f\u6b21\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n\n\n\n
\u3010\u57fa\u672c\u69cb\u6587\u3011<\/strong><\/p>\n\n\n\n
\u6587\u5b57\u5217.split(\u533a\u5207\u308a\u6587\u5b57);<\/code><\/pre><\/div>\n\n\n\n
\u4ee5\u4e0b\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u3001\u5b9f\u969b\u306e\u52d5\u304d\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n
const str = "sample@test.com";\nconst result = str.split("@");\nconsole.log(result);<\/code><\/pre><\/div>\n\n\n\n
\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n
['sample', 'test.com']<\/code><\/pre>\n\n\n\n
\u6307\u5b9a\u3057\u305f\u300c@\u300d\u306e\u524d\u5f8c\u3067\u6587\u5b57\u5217\u304c\u5206\u304b\u308c\u3001\u305d\u308c\u305e\u308c\u304c\u914d\u5217\u306e\u8981\u7d20\u3068\u3057\u3066\u683c\u7d0d\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
\u533a\u5207\u308a\u6587\u5b57\u306e\u6307\u5b9a\u306b\u306f\u3001\u6b63\u898f\u8868\u73fe\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n
const str = "sample@test.com";\nconst result = str.split(\/[@, .]\/);\nconsole.log(result);<\/code><\/pre><\/div>\n\n\n\n
\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n
['sample', 'test', 'com']<\/code><\/pre>\n\n\n\n
\u307e\u305f\u3001\u5206\u5272\u3059\u308b\u56de\u6570\u3092\u4efb\u610f\u3067\u6307\u5b9a\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n
\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n
const str = "\u308a\u3093\u3054\u3001\u307f\u304b\u3093\u3001\u3082\u3082\u3001\u3076\u3069\u3046\u3001\u3044\u3061\u3054";\nconst result = str.split("\u3001", 3);\nconsole.log(result);<\/code><\/pre><\/div>\n\n\n\n
\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n
['\u308a\u3093\u3054', '\u307f\u304b\u3093', '\u3082\u3082']<\/code><\/pre>\n\n\n\n
\u56de\u6570\u3092\u6307\u5b9a\u3057\u305f\u5834\u5408\u3001\u7bc4\u56f2\u5916\u306e\u6587\u5b57\u5217\u306f\u914d\u5217\u306e\u8981\u7d20\u306b\u542b\u307e\u308c\u306a\u3044\u306e\u3067\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n
\u307e\u3068\u3081<\/h2>\n\n\n\n
\u4eca\u56de\u306f\u3001JavaScript\u3067\u6587\u5b57\u5217\u3092\u5206\u5272\u30fb\u5207\u308a\u51fa\u3057\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3057\u305f\u3002
\u30e1\u30bd\u30c3\u30c9\u3054\u3068\u306b\u4f7f\u7528\u3067\u304d\u308b\u6587\u5b57\u5217\u3084\u7bc4\u56f2\u304c\u7570\u306a\u308b\u306e\u3067\u3001\u305d\u308c\u305e\u308c\u306e\u7279\u5fb4\u3092\u62bc\u3055\u3048\u3066\u4e0a\u624b\u306b\u6d3b\u7528\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n\n\n\n
\u95a2\u9023\u8a18\u4e8b<\/h2>\n\n\n\n