{"id":123854,"date":"2024-03-24T12:52:18","date_gmt":"2024-03-24T03:52:18","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/es6-%e9%85%8d%e5%88%97%e3%81%ae%e9%87%8d%e8%a4%87%e5%89%8a%e9%99%a4%e6%96%b9%e6%b3%95\/"},"modified":"2024-03-28T08:15:28","modified_gmt":"2024-03-27T23:15:28","slug":"es6-%e9%85%8d%e5%88%97%e3%81%ae%e9%87%8d%e8%a4%87%e5%89%8a%e9%99%a4%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/es6-%e9%85%8d%e5%88%97%e3%81%ae%e9%87%8d%e8%a4%87%e5%89%8a%e9%99%a4%e6%96%b9%e6%b3%95\/","title":{"rendered":"ES6 \u914d\u5217\u306e\u91cd\u8907\u524a\u9664\u65b9\u6cd5"},"content":{"rendered":"

ES6\u914d\u5217\u306e\u91cd\u8907\u6392\u9664\u624b\u6cd5<\/p>\n

    \n
  1. Set \u30c7\u30fc\u30bf\u69cb\u9020\u3092\u4f7f\u7528\u3057\u3066<\/li>\n<\/ol>\n
    let arr = [1, 2, 2, 3, 4, 4];\r\nlet newArr = [...new Set(arr)];\r\nconsole.log(newArr); \/\/ [1, 2, 3, 4]\r\n<\/code><\/pre>\n
      \n
    1. \u30d5\u30a3\u30eb\u30bf\u30e1\u30bd\u30c3\u30c9\u4f7f\u3046<\/li>\n<\/ol>\n
      let arr = [1, 2, 2, 3, 4, 4];\r\nlet newArr = arr.filter((item, index) => arr.indexOf(item) === index);\r\nconsole.log(newArr); \/\/ [1, 2, 3, 4]\r\n<\/code><\/pre>\n
        \n
      1. reduce\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b<\/li>\n<\/ol>\n
        let arr = [1, 2, 2, 3, 4, 4];\r\nlet newArr = arr.reduce((prev, curr) => prev.includes(curr) ? prev : [...prev, curr], []);\r\nconsole.log(newArr); \/\/ [1, 2, 3, 4]\r\n<\/code><\/pre>\n
          \n
        1. Map\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u4f7f\u7528\u3059\u308b<\/li>\n<\/ol>\n
          let arr = [1, 2, 2, 3, 4, 4];\r\nlet map = new Map();\r\nlet newArr = [];\r\nfor(let i = 0; i < arr.length; i++) {\r\nif(!map.has(arr[i])) {\r\nmap.set(arr[i], true);\r\nnewArr.push(arr[i]);\r\n}\r\n}\r\nconsole.log(newArr); \/\/ [1, 2, 3, 4]\r\n<\/code><\/pre>\n
          \u5177\u4f53\u7684\u306a\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u65b9\u6cd5\u3092\u9078\u629e\u3067\u304d\u308b\u5171\u901a\u306e\u91cd\u8907\u524a\u9664\u65b9\u6cd5\u306f\u3001\u4e0a\u8a18\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
          ES6\u914d\u5217\u306e\u91cd\u8907\u6392\u9664\u624b\u6cd5 Set \u30c7\u30fc\u30bf\u69cb\u9020\u3092\u4f7f\u7528\u3057\u3066 let arr = [1, 2, 2, 3, 4, 4]; let newArr = […new Set(arr)]; console.log(newArr); […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-123854","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nES6 \u914d\u5217\u306e\u91cd\u8907\u524a\u9664\u65b9\u6cd5 - Blog - Silicon Cloud<\/title>\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.silicloud.com\/ja\/blog\/es6-\u914d\u5217\u306e\u91cd\u8907\u524a\u9664\u65b9\u6cd5\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ES6 \u914d\u5217\u306e\u91cd\u8907\u524a\u9664\u65b9\u6cd5\" \/>\n<meta property=\"og:description\" content=\"ES6\u914d\u5217\u306e\u91cd\u8907\u6392\u9664\u624b\u6cd5 Set \u30c7\u30fc\u30bf\u69cb\u9020\u3092\u4f7f\u7528\u3057\u3066 let arr = [1, 2, 2, 3, 4, 4]; 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