{"id":9925,"date":"2025-10-17T17:52:57","date_gmt":"2025-10-17T08:52:57","guid":{"rendered":"https:\/\/techmania.jp\/blog\/?p=9925"},"modified":"2025-10-17T17:52:59","modified_gmt":"2025-10-17T08:52:59","slug":"javascript-map","status":"publish","type":"post","link":"https:\/\/techmania.jp\/blog\/javascript-map\/","title":{"rendered":"\u3010JavaScript\u5165\u9580\u3011map\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\u3068Map\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f7f\u3044\u65b9\u3092\u305d\u308c\u305e\u308c\u89e3\u8aac"},"content":{"rendered":"\n

\u914d\u5217\u3092\u4f7f\u7528\u3059\u308b\u969b\u306b\u3001\u5404\u8981\u7d20\u306b\u5bfe\u3057\u3066\u4f55\u3089\u306e\u51e6\u7406\u3092\u884c\u3044\u305f\u3044\u5834\u5408\u304c\u3042\u308b\u3068\u601d\u3044\u307e\u3059\u3002
for\u6587\u306a\u3069\u306e\u30eb\u30fc\u30d7\u51e6\u7406\u3092\u4f7f\u3063\u3066\u884c\u3046\u3053\u3068\u3082\u52ff\u8ad6\u53ef\u80fd\u3067\u3059\u304c\u3001\u305d\u3046\u3057\u305f\u30b1\u30fc\u30b9\u3067\u6d3b\u7528\u3067\u304d\u308b\u306e\u304cmap\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002<\/p>\n\n\n\n

\u4eca\u56de\u306f\u3001JavaScript\u306emap\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u304d\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

JavaScript\u306emap\u30e1\u30bd\u30c3\u30c9\u3068\u306f\uff1f<\/h2>\n\n\n\n

map\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u5bfe\u8c61\u306e\u914d\u5217\u306e\u5404\u8981\u7d20\u306b\u5bfe\u3057\u3066\u6307\u5b9a\u306e\u95a2\u6570\u3092\u5b9f\u884c\u3057\u3001\u305d\u306e\u7d50\u679c\u3092\u65b0\u305f\u306a\u914d\u5217\u3068\u3057\u3066\u8fd4\u5374\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002<\/p>\n\n\n\n

\u901a\u5e38\u3001\u914d\u5217\u306e\u5404\u8981\u7d20\u306b\u5bfe\u3057\u3066\u4f55\u304b\u3057\u3089\u306e\u51e6\u7406\u3092\u884c\u3046\u5834\u5408\u3001for\u6587\u306a\u3069\u3092\u4f7f\u7528\u3057\u3066\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n

const numArray = [1, 2, 3, 4, 5];\nconst resultArray = [];\n\nfor (let i = 0; i < numArray.length; i++) {\n  resultArray.push(numArray[i] + 10);\n}\n\nconsole.log(resultArray);<\/code><\/pre><\/div>\n\n\n\n
map\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u3092\u3088\u308a\u7c21\u6f54\u306b\u8a18\u8ff0\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 numArray = [1, 2, 3, 4, 5];\nconst resultArray = numArray(num => num + 10);\n\nconsole.log(resultArray);<\/code><\/pre><\/div>\n\n\n\n
\u307e\u305f\u3001\u51e6\u7406\u5f8c\u306e\u7d50\u679c\u304c\u65b0\u3057\u3044\u914d\u5217\u3067\u8fd4\u3055\u308c\u308b\u305f\u3081\u3001\u5143\u306e\u8981\u7d20\u306e\u5024\u3092\u5909\u66f4\u3057\u305f\u304f\u306a\u3044\u5834\u5408\u306b\u3082\u6d3b\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
map\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9<\/h2>\n\n\n\n
\u3055\u3063\u305d\u304f\u3001map\u30e1\u30bd\u30c3\u30c9\u306e\u8a73\u3057\u3044\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u57fa\u672c\u69cb\u6587<\/h3>\n\n\n\n
\u307e\u305a\u306f\u3001\u57fa\u672c\u69cb\u6587\u304b\u3089\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
map\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u969b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u69cb\u6587\u3067\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u3010\u57fa\u672c\u69cb\u6587\u3011<\/strong><\/p>\n\n\n\n
\u914d\u5217\u540d.map( \u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570 );<\/code><\/pre><\/div>\n\n\n\n
\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5f62\u5f0f\u3067\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u3010\u57fa\u672c\u69cb\u6587\u3011<\/strong><\/p>\n\n\n\n
\u914d\u5217\u540d.map(function(\u5f15\u6570\u540d) {\n    \/\/\u51e6\u7406\u5185\u5bb9\n    return \u51e6\u7406\u7d50\u679c\n});<\/code><\/pre><\/div>\n\n\n\n
\u307e\u305f\u306f\u3001\u30a2\u30ed\u30fc\u95a2\u6570\u5f0f\u3067\u8a18\u8ff0\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n
\u3010\u57fa\u672c\u69cb\u6587\u3011<\/strong><\/p>\n\n\n\n
\u914d\u5217\u540d.map(\u5f15\u6570\u540d => \u51e6\u7406\u5185\u5bb9);<\/code><\/pre><\/div>\n\n\n\n
\u51e6\u7406\u5185\u5bb9\u304c\u77ed\u3044\u30b3\u30fc\u30c9\u3067\u6e08\u3080\u5834\u5408\u306b\u306f\u3001\u30a2\u30ed\u30fc\u95a2\u6570\u5f0f\u3092\u4f7f\u7528\u3059\u308b\u65b9\u304c\u3088\u308a\u7c21\u6f54\u306b\u8a18\u8ff0\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u914d\u5217\u3092\u7e70\u308a\u8fd4\u3057\u51e6\u7406\u3059\u308b<\/h3>\n\n\n\n
\u57fa\u672c\u69cb\u6587\u3092\u78ba\u8a8d\u3057\u7d42\u3048\u305f\u3068\u3053\u308d\u3067\u3001\u5b9f\u969b\u306b map\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u305f\u5834\u5408\u306e\u52d5\u4f5c\u3092\u78ba\u8a8d\u3057\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 sampleArray = [1, 2, 3, 4, 5];\nconst resultArray = sampleArray.map(num => num * 10);\n\nconsole.log(resultArray);<\/code><\/pre><\/div>\n\n\n\n
\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n
[ 10, 20, 30, 40, 50 ]<\/code><\/pre><\/div>\n\n\n\n
\u7d50\u679c\u3092\u898b\u308b\u3068\u3001\u95a2\u6570\u5185\u306b\u8a18\u8ff0\u3057\u305f\u51e6\u7406\u304c\u5168\u3066\u306e\u8981\u7d20\u306b\u5bfe\u3057\u3066\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b\u306e\u304c\u5206\u304b\u308a\u307e\u3059\u306d\u3002
for\u6587\u3067\u5404\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3066\u3082\u540c\u69d8\u306e\u51e6\u7406\u306f\u884c\u3048\u307e\u3059\u304c\u3001\u51e6\u7406\u5f8c\u306e\u5024\u3092\u683c\u7d0d\u3059\u308b\u305f\u3081\u306e\u914d\u5217\u3092\u5225\u9014\u3067\u5ba3\u8a00\u3057\u305f\u308a\u3001\u5404\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u305f\u3081\u306e\u8a18\u8ff0\u304c\u5fc5\u8981\u3060\u3063\u305f\u308a\u3068\u3001map\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3088\u308a\u3082\u8a18\u8ff0\u91cf\u304c\u591a\u304f\u306a\u308a\u304c\u3061\u3067\u3059\u3002<\/p>\n\n\n\n
map\u30e1\u30bd\u30c3\u30c9\u306e\u5834\u5408\u306f\u305d\u3046\u3057\u305f\u5fc5\u8981\u51e6\u7406\u306e\u6570\u304c\u6e1b\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u3069\u306e\u914d\u5217\u306b\u5bfe\u3057\u3066\u51e6\u7406\u3092\u884c\u3063\u3066\u3044\u308b\u304b\u304c\u8996\u899a\u7684\u306b\u5206\u304b\u308a\u3084\u3059\u3044\u3068\u3044\u3046\u30e1\u30ea\u30c3\u30c8\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
forEach\u30e1\u30bd\u30c3\u30c9\u3068\u306e\u9055\u3044\u306b\u3064\u3044\u3066<\/h3>\n\n\n\n
map\u30e1\u30bd\u30c3\u30c9\u3068\u540c\u3058\u3088\u3046\u306b\u3001\u5168\u3066\u306e\u8981\u7d20\u306b\u5bfe\u3057\u3066\u7279\u5b9a\u306e\u51e6\u7406\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u308b \u300cforEach\u300d \u3068\u3044\u3046\u30e1\u30bd\u30c3\u30c9\u304c\u3001Javascript\u306b\u306f\u5b58\u5728\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u6700\u7d42\u7684\u306b\u540c\u3058\u7d50\u679c\u3092\u5f97\u308b\u51e6\u7406\u3092\u3001map\u30e1\u30bd\u30c3\u30c9\u3067\u8a18\u8ff0\u3057\u305f\u5834\u5408\u3068\u3001forEach\u30e1\u30bd\u30c3\u30c9\u3067\u8a18\u8ff0\u3057\u305f\u5834\u5408\u3067\u898b\u6bd4\u3079\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 sampleArray = [1, 2, 3, 4, 5];\n\n\/\/ map\u30e1\u30bd\u30c3\u30c9\u306e\u5834\u5408\nsampleArray.map(function(num) {\n    console.log(num);\n});\n\n\/\/ forEach\u30e1\u30bd\u30c3\u30c9\u306e\u5834\u5408\nsampleArray.forEach(function(num) {\n    console.log(num);\n});<\/code><\/pre><\/div>\n\n\n\n
\u3053\u308c\u3060\u3051\u3067\u898b\u308b\u3068\u3001\u4e21\u8005\u306e\u30e1\u30bd\u30c3\u30c9\u306b\u5927\u304d\u306a\u9055\u3044\u306f\u7121\u3044\u3088\u3046\u306b\u898b\u3048\u307e\u3059\u306d\u3002
\u4e0a\u8ff0\u306e\u901a\u308a\u3001\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3057\u305f\u7d50\u679c\u3082\u3069\u3061\u3089\u3082\u540c\u3058\u3082\u306e\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\u3053\u308c\u3089\uff12\u3064\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u6700\u3082\u9055\u3046\u70b9\u306f\u3001\u623b\u308a\u5024\u3092\u8fd4\u3059\u3053\u3068\u304c\u53ef\u80fd\u304b\u5426\u304b\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\u307e\u305a\u306f\u3001\u4ee5\u4e0b\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u898b\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n
\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n
const sampleArray = [1, 2, 3, 4, 5];\n\nconst resultArray = sampleArray.forEach(num => {\n    return num * 10;\n});\n\nconsole.log(resultArray);<\/code><\/pre><\/div>\n\n\n\n
\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n
undefined<\/code><\/pre><\/div>\n\n\n\n
\u540c\u3058\u304f\u30eb\u30fc\u30d7\u51e6\u7406\u306e\uff11\u3064\u3067\u3042\u308bfor\u6587\u3067\u306f\u3001 return\u3092\u5b9f\u884c\u3057\u305f\u6bb5\u968e\u3067\u51e6\u7406\u304c\u4e2d\u65ad\u3055\u308c\u30eb\u30fc\u30d7\u304b\u3089\u629c\u3051\u51fa\u3057\u307e\u3059\u304c\u3001forEach\u30e1\u30bd\u30c3\u30c9\u306e\u5834\u5408\u306f\u5168\u3066\u306e\u8981\u7d20\u3092\u51e6\u7406\u3057\u7d42\u308f\u308b\u307e\u3067\u30eb\u30fc\u30d7\u3092\u629c\u3051\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002
\u307e\u305f\u3001for\u6587\u306e\u5834\u5408\u306f return\u3067\u6307\u5b9a\u3057\u305f\u5024\u3092\u8fd4\u3059\u306e\u306b\u5bfe\u3057\u3001forEach\u30e1\u30bd\u30c3\u30c9\u306f\u5fc5\u305a undefined\u3092\u8fd4\u3059\u4ed5\u69d8\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
\u914d\u5217\u306e\u5168\u8981\u7d20\u306b\u5bfe\u3057\u3066\u51e6\u7406\u3092\u884c\u3046\u5834\u5408\u306b\u3001for\u6587\u3088\u308a\u3082\u7c21\u6f54\u306b\u8a18\u8ff0\u3067\u304d\u308b forEach\u30e1\u30bd\u30c3\u30c9\u3067\u306f\u3042\u308a\u307e\u3059\u304c\u3001\u4e0a\u8ff0\u306e\u7406\u7531\u306b\u3088\u308a\u3001\u51e6\u7406\u7d50\u679c\u3092\u95a2\u6570\u306e\u30d6\u30ed\u30c3\u30af\u5916\u306b\u6e21\u3057\u305f\u3044\u5834\u5408\u306f\u5de5\u592b\u304c\u5fc5\u8981\u3068\u306a\u308a\u307e\u3059\u3002
\u8981\u7d20\u306b\u5bfe\u3057\u3066\u884c\u3044\u305f\u3044\u51e6\u7406\u306e\u5185\u5bb9\u3084\u3001\u623b\u308a\u5024\u304c\u5fc5\u8981\u304b\u3069\u3046\u304b\u306a\u3069\u306b\u5408\u308f\u305b\u3066\u3001\u305d\u308c\u305e\u308c\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3044\u5206\u3051\u308b\u3068\u3044\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
map\u30e1\u30bd\u30c3\u30c9\u306e\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u306b\u3064\u3044\u3066<\/h2>\n\n\n\n
\u30e1\u30bd\u30c3\u30c9\u306e\u5f15\u6570\u306b\u6e21\u3059\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u306b\u3064\u3044\u3066\u3001\u3055\u3089\u306b\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u306e\u5f15\u6570\u3092\u8907\u6570\u6307\u5b9a\u3059\u308b<\/h3>\n\n\n\n
\u3053\u308c\u307e\u3067\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u306f\u3001\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u306b\u6e21\u3059\u5f15\u6570\u3092\uff11\u3064\u306e\u307f\u6307\u5b9a\u3057\u3066\u3044\u307e\u3057\u305f\u304c\u3001\u305d\u306e\u4ed6\u306b\u3082\u4efb\u610f\u3067\u6307\u5b9a\u3067\u304d\u308b\u5f15\u6570\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
map\u30e1\u30bd\u30c3\u30c9\u306e\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3067\u6307\u5b9a\u3067\u304d\u308b\u5f15\u6570\u306f\u3001\u4ee5\u4e0b\u306e\uff13\u3064\u3067\u3059\u3002<\/p>\n\n\n\n
    \n
  • \u7b2c\uff11\u5f15\u6570 \u2026 \u914d\u5217\u306e\u8981\u7d20<\/li>\n\n\n\n
  • \u7b2c\uff12\u5f15\u6570 \u2026 \u30a4\u30f3\u30c7\u30c3\u30af\u30b9<\/li>\n\n\n\n
  • \u7b2c\uff13\u5f15\u6570 \u2026 \u30e1\u30bd\u30c3\u30c9\u3067\u51e6\u7406\u3057\u3066\u3044\u308b\u914d\u5217<\/li>\n<\/ul>\n\n\n\n
    \u3053\u308c\u3089\u306e\u5f15\u6570\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u67d4\u8edf\u306b\u51e6\u7406\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
    \u4f8b\u3048\u3070\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u5143\u306b\u6761\u4ef6\u5206\u5c90\u3092\u884c\u3048\u3070\u3001\u51e6\u7406\u3092\u9069\u7528\u3059\u308b\u8981\u7d20\u3092\u7c21\u5358\u306b\u9650\u5b9a\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 sampleArray = [1, 2, 3, 4, 5];\n\nconst resultArray = sampleArray.map((num, index) => {\n    \/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u5076\u6570\u306e\u6642\u306e\u307f10\u500d\u306b\u3059\u308b\n    if (index % 2 === 0){\n        return num * 10;\n    } else {\n        return num;\n    }\n});\n\nconsole.log(resultArray);<\/code><\/pre><\/div>\n\n\n\n
    \u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n
    [ 10, 2, 30, 4, 50 ]<\/code><\/pre><\/div>\n\n\n\n
    \u30ab\u30a6\u30f3\u30c8\u7528\u306e\u5909\u6570\u3092\u5225\u3067\u5ba3\u8a00\u3057\u305f\u308a\u3059\u308b\u5fc5\u8981\u304c\u7121\u304f\u306a\u308b\u305f\u3081\u3001\u30b3\u30fc\u30c9\u304c\u3088\u308a\u7c21\u6f54\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
    \u307e\u305f\u3001\u57fa\u672c\u7684\u306b\u306f\u5143\u306e\u914d\u5217\u306b\u5909\u66f4\u304c\u52a0\u308f\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u5f15\u6570\u3067\u53d6\u5f97\u3059\u308b\u3053\u3068\u3067\u76f4\u63a5\u64cd\u4f5c\u3082\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
    \u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n
    const sampleArray = [1, 2, 3, 4, 5];\n\nconst resultArray = sampleArray.map((num, index, array) => {\n\n    if (index % 2 === 0) {\n        return num * 10;\n    } else {\n        \/\/ \u5947\u6570\u306e\u5834\u5408\u306f\u5143\u306e\u914d\u5217\u306e\u8981\u7d20\u3092\u5909\u66f4\n        array[index] = num * 10;\n        return num\n    }\n});\n\nconsole.log(sampleArray);\nconsole.log(resultArray);<\/code><\/pre><\/div>\n\n\n\n
    \u3010\u5b9f\u884c\u7d50\u679c\u3011<\/p>\n\n\n\n
    [ 1, 20, 3, 40, 5 ]\n[ 10, 2, 30, 4, 50 ]<\/code><\/pre><\/div>\n\n\n\n
    \u3053\u306e\u3088\u3046\u306b\u3001\u305d\u308c\u305e\u308c\u306e\u5f15\u6570\u3092\u6d3b\u7528\u3057\u3066\u3001\u69d8\u3005\u306a\u51e6\u7406\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
    map\u30e1\u30bd\u30c3\u30c9\u306b\u985e\u4f3c\u3057\u305f\u30e1\u30bd\u30c3\u30c9\u3092\u7d39\u4ecb<\/h2>\n\n\n\n
    \u5b9f\u884c\u3059\u308b\u51e6\u7406\u5185\u5bb9\u3092\u81ea\u8eab\u3067\u5b9a\u7fa9\u3059\u308b\u305f\u3081\u3001\u69d8\u3005\u306a\u30b1\u30fc\u30b9\u306b\u67d4\u8edf\u306b\u5bfe\u5fdc\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b map\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u304c\u3001\u8a18\u8ff0\u5185\u5bb9\u306b\u3088\u3063\u3066\u306f\u4ed6\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u5bfe\u5fdc\u3067\u304d\u308b\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
    \u7528\u9014\u304c\u5b9a\u3081\u3089\u308c\u3066\u3044\u308b\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u3001\u305d\u306e\u30b3\u30fc\u30c9\u304c\u3069\u306e\u3088\u3046\u306a\u51e6\u7406\u3092\u3059\u308b\u3082\u306e\u3067\u3042\u308b\u304b\u304c\u4e00\u76ee\u3067\u5206\u304b\u308a\u3084\u3059\u304f\u306a\u308b\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308b\u305f\u3081\u3001\u5834\u5408\u306b\u3088\u3063\u3066\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3044\u5206\u3051\u308b\u306e\u304c\u304a\u3059\u3059\u3081\u3067\u3059\u3002<\/p>\n\n\n\n
    \u3053\u3053\u304b\u3089\u306f\u3001map\u30e1\u30bd\u30c3\u30c9\u306e\u4ee3\u308f\u308a\u306b\u4f7f\u7528\u53ef\u80fd\u306a\u3044\u304f\u3064\u304b\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u7d39\u4ecb\u3057\u3066\u3044\u304d\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
    filter\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9<\/h3>\n\n\n\n
    \uff11\u3064\u76ee\u306f\u3001filter\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002
    \u3053\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u306f\u3001\u7279\u5b9a\u306e\u6761\u4ef6\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u3001\u914d\u5217\u306e\u4e2d\u304b\u3089\u8a72\u5f53\u3059\u308b\u30c7\u30fc\u30bf\u3060\u3051\u3092\u62bd\u51fa\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\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 sampleArray = [1, 2, 3, 4, 5];\n\nconst resultArray = sampleArray.filter(num => num % 2 === 0);\n\nconsole.log(resultArray);<\/code><\/pre><\/div>\n\n\n\n
    \u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n
    [ 2, 4 ]<\/code><\/pre><\/div>\n\n\n\n
    \u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u306b\u8a18\u8ff0\u3057\u305f\u6761\u4ef6\u5f0f\u3092\u5143\u306b\u3001\u8a72\u5f53\u3059\u308b\u30c7\u30fc\u30bf\u3060\u3051\u304c\u623b\u308a\u5024\u306e\u914d\u5217\u306b\u683c\u7d0d\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
    map\u30e1\u30bd\u30c3\u30c9\u3067\u540c\u69d8\u306e\u7d50\u679c\u3092\u5f97\u3088\u3046\u3068\u3059\u308b\u5834\u5408\u3001\u6761\u4ef6\u306b\u4e00\u81f4\u3057\u306a\u3044\u8981\u7d20\u3092\u7701\u304f\u305f\u3081\u306e\u51e6\u7406\u304c\u8907\u96d1\u306b\u306a\u3063\u3066\u3057\u307e\u3046\u305f\u3081\u3001\u30c7\u30fc\u30bf\u62bd\u51fa\u306b\u95a2\u3057\u3066\u306f filter\u30e1\u30bd\u30c3\u30c9\u306e\u65b9\u304c\u4f7f\u7528\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
    reduce\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9<\/h3>\n\n\n\n
    \uff12\u3064\u76ee\u306f\u3001reduce\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002
    \u3053\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u96a3\u308a\u5408\u3046\u8981\u7d20\u306b\u5bfe\u3057\u3066\u540c\u6642\u306b\u95a2\u6570\u3092\u5b9f\u884c\u3057\u3001\u305d\u306e\u6f14\u7b97\u7d50\u679c\u3092\u5358\u4e00\u306e\u5024\u3068\u3057\u3066\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u30e1\u30bd\u30c3\u30c9\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
    \u6587\u7ae0\u3060\u3051\u3067\u306f\u5c11\u3057\u5206\u304b\u308a\u306b\u304f\u3044\u304b\u3068\u601d\u3046\u306e\u3067\u3001\u4ee5\u4e0b\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u5143\u306b\u89e3\u8aac\u3057\u3066\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 sampleArray = [1, 2, 3];\n\nconst result = sampleArray.reduce(function(num1, num2) {\n    console.log("num1\uff1a" + num1);\n    console.log("num2\uff1a" + num2);\n    return num1 + num2;\n});\n\nconsole.log("\u5408\u8a08\uff1a" + result)\n<\/code><\/pre><\/div>\n\n\n\n
    \u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n
    num1\uff1a1\nnum2\uff1a2\nnum1\uff1a3\nnum2\uff1a3\n\u5408\u8a08\uff1a6<\/code><\/pre><\/div>\n\n\n\n
    reduce\u30e1\u30bd\u30c3\u30c9\u3067\u306f\u3001\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u306b\u4ee5\u4e0b\u306e\uff14\u3064\u306e\u5f15\u6570\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
      \n
    • \u7b2c1\u5f15\u6570 \u2026 \u51e6\u7406\u4e2d\u306e\u8981\u7d20\u306e\uff11\u3064\u524d\u306e\u8981\u7d20\u304b\u3001\uff11\u3064\u524d\u306e\u30eb\u30fc\u30d7\u3067\u5b9f\u884c\u3055\u308c\u305f\u95a2\u6570\u7d50\u679c\u3001\u3082\u3057\u304f\u306f\u6307\u5b9a\u306e\u521d\u671f\u5024\u306e\u3044\u305a\u308c\u304b<\/li>\n\n\n\n
    • \u7b2c2\u5f15\u6570 \u2026 \u51e6\u7406\u4e2d\u306e\u8981\u7d20<\/li>\n\n\n\n
    • \u7b2c3\u5f15\u6570 \u2026 \u30a4\u30f3\u30c7\u30c3\u30af\u30b9<\/li>\n\n\n\n
    • \u7b2c4\u5f15\u6570 \u2026 \u30e1\u30bd\u30c3\u30c9\u3067\u51e6\u7406\u3057\u3066\u3044\u308b\u914d\u5217<\/li>\n<\/ul>\n\n\n\n
      \u521d\u56de\u306e\u30eb\u30fc\u30d7\u3067\u306f\u3001\u914d\u5217\u306e\u5148\u982d\u306e\u8981\u7d20\u304b\u3001reduce\u30e1\u30bd\u30c3\u30c9\u306e\u7b2c\uff12\u5f15\u6570\u3067\u6307\u5b9a\u3067\u304d\u308b\u521d\u671f\u5024\u306e\u3069\u3061\u3089\u304b\u304c\u7b2c\uff11\u5f15\u6570\u306b\u6e21\u3055\u308c\u307e\u3059\u3002
      \u4e0a\u8a18\u306e\u30b5\u30f3\u30d7\u30eb\u306e\u5834\u5408\u306f\u521d\u671f\u5024\u306e\u6307\u5b9a\u304c\u7121\u3044\u305f\u3081\u3001\u914d\u5217\u306e\u5148\u982d\u306e\u8981\u7d20\u304c\u6e21\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
      \uff12\u56de\u76ee\u4ee5\u964d\u306e\u30eb\u30fc\u30d7\u3067\u306f\u3001\u524d\u56de\u306e\u30eb\u30fc\u30d7\u3067\uff12\u3064\u306e\u8981\u7d20\u3092\u5408\u7b97\u3057\u305f\u7d50\u679c\u304c\u7b2c\uff11\u5f15\u6570\u306b\u6e21\u3055\u308c\u3001\u7b2c\uff12\u5f15\u6570\u306b\u306f\u672a\u51e6\u7406\u306e\u8981\u7d20\u304c\u9806\u306b\u6e21\u3055\u308c\u3066\u3044\u304d\u307e\u3059\u3002
      \u3053\u308c\u3092\u7e70\u308a\u8fd4\u3059\u3053\u3068\u306b\u3088\u308a\u3001\u6700\u7d42\u7684\u306b\u914d\u5217\u5185\u306e\u5168\u3066\u306e\u8981\u7d20\u3092\u5408\u8a08\u3057\u305f\u6570\u304c\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u3068\u3057\u3066\u8fd4\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
      \u3053\u306e\u3088\u3046\u306b\u3001\u914d\u5217\u5185\u306e\u8981\u7d20\u3092\uff11\u3064\u306e\u5024\u306b\u307e\u3068\u3081\u305f\u3044\u969b\u306a\u3069\u306b\u6d3b\u7528\u3067\u304d\u308b\u306e\u304c\u3001reduce\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002<\/p>\n\n\n\n
      JavaScript\u306eMap\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u306f\uff1f<\/h2>\n\n\n\n
      JavaScript\u3067\u306f\u3001\u30e1\u30bd\u30c3\u30c9\u306emap\u3068\u306f\u5225\u306bMap\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u3044\u3046\u3082\u306e\u304c\u5b58\u5728\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
      \u3053\u3061\u3089\u306b\u3064\u3044\u3066\u3082\u5408\u308f\u305b\u3066\u89e3\u8aac\u3057\u3066\u3044\u304d\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
      Map\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u5ba3\u8a00\u3068\u8981\u7d20\u306e\u8ffd\u52a0\u65b9\u6cd5<\/h3>\n\n\n\n
      Map\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u30ad\u30fc\u3068\u5024\u3092\uff11\u3064\u306e\u30da\u30a2\u3068\u3057\u3066\u683c\u7d0d\u3057\u3001\u305d\u308c\u305e\u308c\u306e\u30da\u30a2\u3092\u914d\u5217\u306e\u3088\u3046\u306b\u307e\u3068\u3081\u3066\u7ba1\u7406\u3059\u308b\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u3053\u3068\u3092\u6307\u3057\u307e\u3059\u3002
      \u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u5168\u822c\u306b\u304a\u3044\u3066\u306f\u3001\u4e3b\u306b\u9023\u60f3\u914d\u5217\u3084\u8f9e\u66f8\u306a\u3069\u3068\u547c\u3070\u308c\u308b\u3082\u306e\u3068\u540c\u3058\u69cb\u9020\u3067\u3001\u30c7\u30fc\u30bf\u3092\u7ba1\u7406\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
      Map\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u65b0\u305f\u306b\u5ba3\u8a00\u3059\u308b\u969b\u306f\u3001new \u3092\u4f7f\u3063\u3066\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
      \u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n
      const samlpeMap = new Map();<\/code><\/pre><\/div>\n\n\n\n
      \u5ba3\u8a00\u3057\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u8981\u7d20\u3092\u8ffd\u52a0\u3059\u308b\u5834\u5408\u306f\u3001set\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u8981\u7d20\u3092\u683c\u7d0d\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
      \u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n
      samlpeMap.set("apple", 10);<\/code><\/pre><\/div>\n\n\n\n
      \u30e1\u30bd\u30c3\u30c9\u306b\u306f\u3001\u8981\u7d20\u306b\u7d10\u3065\u3051\u308b\u30ad\u30fc\u3068\u3001\u683c\u7d0d\u3059\u308b\u5024\u3092\u9806\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002
      \u3053\u306e\u5834\u5408\u306f\u3001\u300capple\u300d \u304c\u30ad\u30fc\u3001\u300c10\u300d \u304c\u8981\u7d20\u306e\u5024\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
      \u306a\u304a\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e \u751f\u6210\u6642\u306b\u521d\u671f\u5024\u3092\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 samlpeMap = new Map([["apple", 10], ["orange", 15]]);<\/code><\/pre><\/div>\n\n\n\n
      \u8981\u7d20\u306e\u53d6\u5f97\u30fb\u524a\u9664\u306e\u65b9\u6cd5<\/h3>\n\n\n\n
      \u683c\u7d0d\u3057\u305f\u8981\u7d20\u3092\u53d6\u5f97\u3059\u308b\u969b\u306f\u3001get\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30a2\u30af\u30bb\u30b9\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
      \u30a2\u30af\u30bb\u30b9\u3059\u308b\u969b\u306b\u306f\u3001\u5404\u8981\u7d20\u306b\u7d10\u3065\u3051\u305f\u30ad\u30fc\u3092\u6307\u5b9a\u3057\u3066\u5bfe\u5fdc\u3059\u308b\u8981\u7d20\u3092\u53d6\u308a\u51fa\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
      \u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n
      const samlpeMap = new Map([["apple", 10], ["orange", 15]]);\n\nconsole.log("apple\uff1a" + samlpeMap.get("apple") + \u201c\u500b\u201d);\nconsole.log("orange\uff1a" + samlpeMap.get("orange") + \u201c\u500b\u201d);<\/code><\/pre><\/div>\n\n\n\n
      \u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n
      apple\uff1a10\u500b\norange\uff1a15\u500b<\/code><\/pre><\/div>\n\n\n\n
      \u5bfe\u8c61\u306e\u30ad\u30fc\u304c\u5b58\u5728\u3059\u308b\u304b\u3092\u4e8b\u524d\u306b\u78ba\u8a8d\u3057\u305f\u3044\u5834\u5408\u306f\u3001has\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30ad\u30fc\u306e\u691c\u7d22\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
      console.log(samlpeMap.has("apple"))<\/code><\/pre><\/div>\n\n\n\n
      \u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n
      true<\/code><\/pre><\/div>\n\n\n\n
      \u683c\u7d0d\u6e08\u307f\u306e\u8981\u7d20\u3092\u524a\u9664\u3057\u305f\u3044\u5834\u5408\u306f\u3001delete\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
      \u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n
      const samlpeMap = new Map([["apple", 10], ["orange", 15]]);\n\nconsole.log("\u524a\u9664\u524d\uff1a");\nconsole.log(samlpeMap);\n\nsamlpeMap.delete("apple");\n\nconsole.log("\u524a\u9664\u5f8c\uff1a");\nconsole.log(samlpeMap);<\/code><\/pre><\/div>\n\n\n\n
      \u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n
      \u524a\u9664\u524d\uff1a\nMap(2) { 'apple' => 10, 'orange' => 15 }\n\u524a\u9664\u5f8c\uff1a\nMap(1) { 'orange' => 15 }<\/code><\/pre><\/div>\n\n\n\n
      Map\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u7e70\u308a\u8fd4\u3057\u51e6\u7406\u3092\u3059\u308b<\/h3>\n\n\n\n
      \u914d\u5217\u306e\u6642\u3068\u540c\u3058\u3088\u3046\u306b\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u5185\u306e\u8981\u7d20\u306b\u5168\u3066\u306e\u8981\u7d20\u306b\u5bfe\u3057\u3066\u51e6\u7406\u3092\u884c\u3044\u305f\u3044\u30b1\u30fc\u30b9\u3082\u4e2d\u306b\u306f\u3042\u308b\u304b\u3068\u601d\u3044\u307e\u3059\u3002
      Map\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u5834\u5408\u306f\u3001\u53d6\u5f97\u3057\u305f\u3044\u30c7\u30fc\u30bf\u304c\u8981\u7d20\u306e\u30ad\u30fc\u3068\u5024\u306e\u3069\u3061\u3089\u3067\u3042\u308b\u304b\u306b\u3088\u3063\u3066\u3001\u65b9\u6cd5\u304c\u5c11\u3057\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
      \u307e\u305a\u57fa\u672c\u3068\u3057\u3066\u3001Map\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u5168\u3066\u306e\u8981\u7d20\u306b\u51e6\u7406\u3092\u884c\u3046\u969b\u306f\u3001for\u2026of\u6587\u3092\u4f7f\u7528\u3057\u3066\u30eb\u30fc\u30d7\u51e6\u7406\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
      \u3010\u57fa\u672c\u69cb\u6587\u3011<\/strong><\/p>\n\n\n\n
      for (\u8981\u7d20 of \u5bfe\u8c61\u30aa\u30d6\u30b8\u30a7\u30af\u30c8) {\n    \/\/ \u51e6\u7406\u5185\u5bb9\n}<\/code><\/pre><\/div>\n\n\n\n
      for\u2026of\u6587\u306e\u8a18\u8ff0\u6642\u306b\u3001\u5f15\u6570\u306e\u6307\u5b9a\u306e\u4ed5\u65b9\u3092\u5909\u3048\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u3001\u53d6\u5f97\u3059\u308b\u30c7\u30fc\u30bf\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
      \u3010\u57fa\u672c\u69cb\u6587\u3011<\/strong><\/p>\n\n\n\n
      \u30fb\u30ad\u30fc\u3092\u53d6\u5f97\u3059\u308b\u5834\u5408\n\/\/ keys\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\nfor (let key of map.keys()) {\n    \/\/ \u51e6\u7406\u5185\u5bb9\n}\n\n\u30fb\u5024\u3092\u53d6\u5f97\u3059\u308b\u5834\u5408\n\/\/ values\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\nfor (let value of map.values()) {\n    \/\/ \u51e6\u7406\u5185\u5bb9\n}\n\n\u30fb\u3069\u3061\u3089\u3082\u53d6\u5f97\u3059\u308b\u5834\u5408\n\/\/ \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u5206\u5272\u4ee3\u5165\u3092\u4f7f\u7528\nfor (let [key, value] of map) {\n    \/\/ \u51e6\u7406\u5185\u5bb9\n}<\/code><\/pre><\/div>\n\n\n\n
      \u4ee5\u4e0b\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u3001\u5b9f\u969b\u306e\u52d5\u4f5c\u3092\u78ba\u8a8d\u3057\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 samlpeMap = new Map([["apple", 10], ["orange", 15], ["banana", 5]]);\n\nfor(let [key, value] of samlpeMap) {\n  console.log(key + "\uff1a" + value);\n}<\/code><\/pre><\/div>\n\n\n\n
      \u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n
      apple\uff1a10\norange\uff1a15\nbanana\uff1a5<\/code><\/pre><\/div>\n\n\n\n
      \u53d6\u5f97\u3057\u305f\u3044\u5185\u5bb9\u306b\u5fdc\u3058\u3066\u3001\u51e6\u7406\u3092\u4f7f\u3044\u5206\u3051\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
      \u307e\u3068\u3081<\/h2>\n\n\n\n
      \u4eca\u56de\u306f\u3001map\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\u306a\u3069\u306b\u3064\u3044\u3066\u89e3\u8aac\u3092\u884c\u3044\u307e\u3057\u305f\u3002<\/p>\n\n\n\n
      \u914d\u5217\u306f\u69d8\u3005\u306a\u30b1\u30fc\u30b9\u3067\u6d3b\u7528\u3055\u308c\u308b\u6a5f\u80fd\u306a\u306e\u3067\u3001map\u30e1\u30bd\u30c3\u30c9\u3092\u542b\u3081\u3001\u64cd\u4f5c\u65b9\u6cd5\u306b\u3064\u3044\u3066\u77e5\u8b58\u3092\u6df1\u3081\u3066\u3044\u304f\u3068\u4eca\u5f8c\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002
      \u305c\u3072\u3053\u306e\u6a5f\u4f1a\u306b\u3001map\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\u306b\u3082\u6163\u308c\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
      JavaScript\u306e\u52c9\u5f37\u65b9\u6cd5\u306f\uff1f<\/h2>\n\n\n
      \u66f8\u7c4d\u3084\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3067\u5b66\u7fd2\u3059\u308b\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002\u6628\u4eca\u3067\u306f\u3001YouTube\u306a\u3069\u306e\u52d5\u753b\u30b5\u30a4\u30c8\u3084\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u30b5\u30a4\u30c8\u306a\u3069\u3082\u5145\u5b9f\u3057\u3066\u3044\u3066\u591a\u304f\u306e\u60c5\u5831\u304c\u624b\u306b\u5165\u308a\u307e\u3059\u3002
      \u305d\u3057\u3066\u3001\u3088\u308a\u52b9\u7387\u7684\u306b\u77e5\u8b58\u30fb\u30b9\u30ad\u30eb\u3092\u7fd2\u5f97\u3059\u308b\u306b\u306f\u3001\u77e5\u8b58\u3092\u3064\u3051\u306a\u304c\u3089\u5b9f\u969b\u306b\u624b\u3092\u52d5\u304b\u3057\u3066\u307f\u308b\u306a\u3069\u3001\u30a4\u30f3\u30d7\u30c3\u30c8\u3068\u30a2\u30a6\u30c8\u30d7\u30c3\u30c8\u3092\u7e70\u308a\u8fd4\u3057\u3066\u3044\u304f\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u7279\u306b\u72ec\u5b66\u306e\u5834\u5408\u306f\u3001\u6709\u8b58\u8005\u306b\u8cea\u554f\u304c\u3067\u304d\u305f\u308a\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\u3092\u3082\u3089\u3048\u308b\u3088\u3046\u306a\u74b0\u5883\u304c\u3042\u308b\u3068\u3001\u7406\u89e3\u5ea6\u304c\u6df1\u307e\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n
      \u305f\u3060\u3001JavaScript\u306b\u9650\u3089\u305a\u3001IT\u30b9\u30ad\u30eb\u3092\u8eab\u306b\u3064\u3051\u308b\u969b\u3001\u3069\u3046\u3057\u3066\u3082\u8ab2\u984c\u306b\u3076\u3064\u304b\u3063\u3066\u3057\u307e\u3046\u3053\u3068\u306f\u3042\u308a\u307e\u3059\u3088\u306d\u3002\u7279\u306b\u72ec\u5b66\u3060\u3068\u3001\u308f\u304b\u3089\u306a\u3044\u90e8\u5206\u3092\u30d7\u30ed\u306b\u8cea\u554f\u3067\u304d\u308b\u6a5f\u4f1a\u3092\u78ba\u4fdd\u3057\u306b\u304f\u304f\u3001\u30e2\u30c1\u30d9\u30fc\u30b7\u30e7\u30f3\u304c\u7d9a\u304d\u306b\u304f\u3044\u3068\u3044\u3046\u5074\u9762\u304c\u3042\u308a\u307e\u3059\u3002\u72ec\u5b66\u3067\u30e2\u30c1\u30d9\u30fc\u30b7\u30e7\u30f3\u3092\u7dad\u6301\u3059\u308b\u81ea\u4fe1\u304c\u306a\u3044\u4eba\u306b\u306f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\u3068\u3044\u3046\u624b\u3082\u3042\u308a\u307e\u3059\u3002\u8cbb\u7528\u306f\u639b\u304b\u308a\u307e\u3059\u304c\u3001\u305d\u306e\u5206\u30b9\u30ad\u30eb\u3092\u8eab\u306b\u3064\u3051\u3084\u3059\u3044\u3067\u3059\u3002\u3057\u3063\u304b\u308a\u3068\u77e5\u8b58\u30fb\u30b9\u30ad\u30eb\u3092\u7fd2\u5f97\u3057\u3066\u5b9f\u8df5\u306b\u6d3b\u304b\u3057\u305f\u3044\u3068\u3044\u3046\u4eba\u306f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\u304c\u304a\u3059\u3059\u3081\u3067\u3059\u3002<\/p>\n
      \u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\u306a\u3089\u30c6\u30c3\u30af\u30de\u30cb\u30a2\u304c\u304a\u3059\u3059\u3081\uff01<\/strong><\/span><\/p>\n\n\n\"\"\n\n\n
      IT\u30b9\u30ad\u30eb\u9700\u8981\u306e\u9ad8\u307e\u308a\u3068\u3068\u3082\u306b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\u3082\u5897\u3048\u307e\u3057\u305f\u3002\u3057\u304b\u3057\u3001\u3069\u306e\u30b9\u30af\u30fc\u30eb\u306b\u901a\u3046\u3079\u304d\u304b\u8ff7\u3063\u3066\u3057\u307e\u3046\u4eba\u3082\u3044\u308b\u3067\u3057\u3087\u3046\u3002\u305d\u3093\u306a\u65b9\u306b\u306f\u30c6\u30c3\u30af\u30de\u30cb\u30a2\u3092\u304a\u3059\u3059\u3081\u3057\u307e\u3059\uff01\u3053\u308c\u307e\u3067\u591a\u304f\u306eIT\u30a8\u30f3\u30b8\u30cb\u30a2\u3092\u80b2\u6210\u30fb\u8f29\u51fa\u3057\u3066\u304d\u305f\u30c6\u30c3\u30af\u30de\u30cb\u30a2\u3067\u3082\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\u3092\u958b\u8b1b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
      \n
      \uff1c\u30c6\u30c3\u30af\u30de\u30cb\u30a2\u306e\u7279\u5fb4\uff1e<\/strong>
      \u30fb\u305f\u3057\u304b\u306a\u80b2\u6210\u5b9f\u7e3e\u3068\u89aa\u8eab\u306a\u6559\u80b2\u3000\uff5e\u30bb\u30ab\u30f3\u30c9\u30ad\u30e3\u30ea\u30a2\u3092\u5168\u529b\u652f\u63f4\uff5e<\/strong>
      \u30fb\u8b1b\u5e2b\u304c\u73fe\u5f79\u30a8\u30f3\u30b8\u30cb\u30a2\u3000\uff5e\u201c\u672c\u5f53\u201d\u306e\u958b\u767a\u30ce\u30a6\u30cf\u30a6\u3092\u76f4\u306b\u5b66\u3079\u308b\uff5e<\/strong>
      \u30fb\u5c02\u5c5e\u8b1b\u5e2b\u304c\u5b66\u7fd2\u3092\u5fb9\u5e95\u30b5\u30dd\u30fc\u30c8\u3000\uff5e\u300c\u308f\u304b\u3089\u306a\u3044\u300d\u3092\u5fb9\u5e95\u89e3\u6c7a\uff5e<\/strong>
      \u30fb\u5b9f\u52d9\u30d9\u30fc\u30b9\u3067\u30b9\u30ad\u30eb\u3092\u7fd2\u5f97\u3000\uff5e\u5b9f\u8df5\u7684\u306a\u51dd\u7e2e\u30ab\u30ea\u30ad\u30e5\u30e9\u30e0\uff5e<\/strong><\/p>\n<\/div>\n
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