{"id":6166,"date":"2023-05-28T02:33:52","date_gmt":"2023-05-27T17:33:52","guid":{"rendered":"https:\/\/engineering.webstudio168.jp\/?p=6166"},"modified":"2023-05-28T02:33:54","modified_gmt":"2023-05-27T17:33:54","slug":"flutter-dart-cascade-notation","status":"publish","type":"post","link":"https:\/\/engineering.webstudio168.jp\/blog\/flutter-dart-cascade-notation\/","title":{"rendered":"\u3010Flutter\u3011Dart\u8a00\u8a9e\u306b\u304a\u3051\u308b\u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u306b\u3064\u3044\u3066\u306e\u307e\u3068\u3081\u3068\u89e3\u8aac\u3002\u5229\u7528\u3059\u308b\u3068\u3053\u3093\u306a\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308a\u307e\u3059"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u76ee\u6b21<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/flutter-dart-cascade-notation\/#Dart%E8%A8%80%E8%AA%9E%E3%81%AB%E3%81%8A%E3%81%91%E3%82%8B%E3%82%AB%E3%82%B9%E3%82%B1%E3%83%BC%E3%83%89%E8%A8%98%E6%B3%95\" >Dart\u8a00\u8a9e\u306b\u304a\u3051\u308b\u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/flutter-dart-cascade-notation\/#%E3%82%AB%E3%82%B9%E3%82%B1%E3%83%BC%E3%83%89%E8%A8%98%E6%B3%95%E3%81%AE%E3%83%A1%E3%83%AA%E3%83%83%E3%83%88%E3%81%A8%E3%81%AF\" >\u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u306e\u30e1\u30ea\u30c3\u30c8\u3068\u306f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/flutter-dart-cascade-notation\/#%E3%82%AB%E3%82%B9%E3%82%B1%E3%83%BC%E3%83%89%E8%A8%98%E6%B3%95%E3%81%AE%E3%83%87%E3%83%A1%E3%83%AA%E3%83%83%E3%83%88%E3%81%AF%E3%81%82%E3%82%8B%E3%81%AE%E3%81%8B%EF%BC%9F\" >\u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u306e\u30c7\u30e1\u30ea\u30c3\u30c8\u306f\u3042\u308b\u306e\u304b\uff1f<\/a><\/li><\/ul><\/nav><\/div>\n\n<p class=\"wp-block-paragraph\">\u307f\u306a\u3055\u3093\u306fDart\u8a00\u8a9e\u3092\u3084\u3063\u3066\u3044\u3066\u300c<strong>..<\/strong>\u300d\u3068\u3044\u3063\u305f\u3088\u3046\u306b\u3001\u30c9\u30c3\u30c8\u306e\u9023\u7d9a\u304c\u30b3\u30fc\u30c9\u5185\u306b\u767b\u5834\u3059\u308b\u3053\u3068\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b\uff1fJavaScript\u3070\u304b\u308a\u3084\u3063\u3066\u3044\u305f\u306e\u3067\u5c11\u3057\u76ee\u65b0\u3057\u304b\u3063\u305f\u306e\u3067\u3001\u7686\u3055\u3093\u306e\u304a\u5f79\u306b\u7acb\u3066\u308b\u304b\u306a\u3068\u601d\u3044\u3001\u3053\u306e\u8a18\u4e8b\u3092\u307e\u3068\u3081\u307e\u3057\u305f\u3002\u300c..\u300d\uff08\u30c9\u30c3\u30c8\u306e\u9023\u7d9a\u306e\u69cb\u6587\u7684\u610f\u5473\u3092\u628a\u63e1\u3057\u3066\u30b9\u30c6\u30c3\u30d7\u30a2\u30c3\u30d7\u3057\u307e\u3057\u3087\u3046\uff09<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dart%E8%A8%80%E8%AA%9E%E3%81%AB%E3%81%8A%E3%81%91%E3%82%8B%E3%82%AB%E3%82%B9%E3%82%B1%E3%83%BC%E3%83%89%E8%A8%98%E6%B3%95\"><\/span>Dart\u8a00\u8a9e\u306b\u304a\u3051\u308b\u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Dart\u8a00\u8a9e\u306e\u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\uff08Cascade Notation\uff09\u306f\u3001<strong>\u8907\u6570\u306e\u30e1\u30bd\u30c3\u30c9\u3084\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u540c\u3058\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5bfe\u3057\u3066\u9023\u7d9a\u3057\u3066\u547c\u3073\u51fa\u3059\u305f\u3081\u306e\u4fbf\u5229\u306a\u69cb\u6587<\/strong>\u3067\u3059\u3002\u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u540c\u3058\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5bfe\u3057\u3066\u8907\u6570\u306e\u64cd\u4f5c\u3092\u9023\u7d9a\u3057\u3066\u884c\u3046\u5834\u5408\u306b\u3001<strong>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059<\/strong>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u306f\u3001<span class=\"marker-under-red\">\u30c9\u30c3\u30c8\uff08.\uff09\u3068\u4e8c\u91cd\u70b9\u53f7\uff08..\uff09\u3092\u4f7f\u7528\u3057\u3066\u5b9f\u73fe\u3055\u308c\u307e\u3059<\/span>\u3002\u30c9\u30c3\u30c8\uff08.\uff09\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u524d\u306e\u64cd\u4f5c\u306e\u7d50\u679c\u3092\u6b21\u306e\u64cd\u4f5c\u306b\u6e21\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<strong>\u4e8c\u91cd\u70b9\u53f7\uff08..\uff09\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u81ea\u4f53\u3092\u8fd4\u3057\u306a\u304c\u3089\u64cd\u4f5c\u3092\u9023\u7d9a\u3057\u3066\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059<\/strong>\u3002\u3069\u3046\u3044\u3046\u3053\u3068\u3067\u3057\u3087\u3046\u304b\u3002\u6b21\u306e\u4f8b\u3092\u898b\u3066\u898b\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0b\u306f\u3001\u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u306e\u4f7f\u7528\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-dart\" data-file=\"Cascade.dart\" data-lang=\"Dart\"><code>class Person {\n  String name;\n  int age;\n\n  void sayHello() {\n    print(&quot;Hello, my name is $name and I&#39;m $age years old.&quot;);\n  }\n}\n\nvoid main() {\n  var person = Person()  \u2190\u4e00\u5fdc\u3067\u3059\u304c\u3001\u300c;\u300d\u304c\u5165\u3063\u3066\u3044\u306a\u3044\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u306e\u3067\u610f\u8b58\u7684\u306b\u898b\u3066\u304f\u3060\u3055\u3044\u3002\n    ..name = &quot;John&quot;      \u2190\u4e00\u5fdc\u3067\u3059\u304c\u3001\u300c;\u300d\u304c\u5165\u3063\u3066\u3044\u306a\u3044\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u306e\u3067\u610f\u8b58\u7684\u306b\u898b\u3066\u304f\u3060\u3055\u3044\u3002\n    ..age = 30;\n\n  person.sayHello();\n}<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u3001<code>Person<\/code>\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\u3057\u3001\u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u3092\u4f7f\u7528\u3057\u3066name\u3068age\u306e\u5024\u3092\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002\u6700\u5f8c\u306b\u3001\u8a2d\u5b9a\u3055\u308c\u305f\u5024\u3092\u4f7f\u7528\u3057\u3066<code>sayHello<\/code>\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001<strong>\u8907\u6570\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u8a2d\u5b9a\u3084\u30e1\u30bd\u30c3\u30c9\u306e\u547c\u3073\u51fa\u3057\u3092\u7c21\u6f54\u306b\u8868\u73fe\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059<\/strong>\u3002\u307e\u305f\u3001\u30cd\u30b9\u30c8\u3057\u305f\u547c\u3073\u51fa\u3057\u3092\u907f\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u30b3\u30fc\u30c9\u306e\u30cd\u30b9\u30c8\u30ec\u30d9\u30eb\u3092\u6d45\u304f\u4fdd\u3064\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u305f\u3060\u3057\u3001<span class=\"marker-red\">\u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u306f\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u3068\u306f\u7570\u306a\u308a\u3001\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u3067\u306f\u306a\u304f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u81ea\u4f53\u3092\u8fd4\u3059\u70b9\u306b\u7559\u610f\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059<\/span>\u3002\u305d\u306e\u305f\u3081\u3001\u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u306f\u3001<strong>\u8fd4\u308a\u5024\u3092\u7121\u8996\u3059\u308b\u64cd\u4f5c\uff08\u4f8b\uff1asetter\u30e1\u30bd\u30c3\u30c9\uff09\u3092\u907f\u3051\u308b<\/strong>\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%82%AB%E3%82%B9%E3%82%B1%E3%83%BC%E3%83%89%E8%A8%98%E6%B3%95%E3%81%AE%E3%83%A1%E3%83%AA%E3%83%83%E3%83%88%E3%81%A8%E3%81%AF\"><\/span>\u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u306e\u30e1\u30ea\u30c3\u30c8\u3068\u306f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u5411\u4e0a<\/strong>\uff1a\u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u540c\u3058\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5bfe\u3059\u308b\u8907\u6570\u306e\u64cd\u4f5c\u3092\u7c21\u6f54\u306b\u8868\u73fe\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u304c\u5411\u4e0a\u3057\u3001\u5197\u9577\u306a\u4e00\u6642\u5909\u6570\u306e\u4f7f\u7528\u3092\u907f\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30cd\u30b9\u30c8\u306e\u524a\u6e1b<\/strong>\uff1a\u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30cd\u30b9\u30c8\u3057\u305f\u547c\u3073\u51fa\u3057\u3092\u907f\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30b3\u30fc\u30c9\u306e\u30cd\u30b9\u30c8\u30ec\u30d9\u30eb\u3092\u6d45\u304f\u4fdd\u3061\u306a\u304c\u3089\u3001\u8907\u6570\u306e\u64cd\u4f5c\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u306e\u67d4\u8edf\u6027<\/strong>\uff1a\u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u3067\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u81ea\u4f53\u3092\u8fd4\u3057\u306a\u304c\u3089\u64cd\u4f5c\u3092\u9023\u7d9a\u3057\u3066\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u3092\u4f7f\u7528\u3057\u306a\u304c\u3089\u3001\u3055\u307e\u3056\u307e\u306a\u64cd\u4f5c\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u306f\u5177\u4f53\u7684\u306b\u3069\u3046\u3044\u3046\u3053\u3068\u3067\u3057\u3087\u3046\u304b\u3002\u5b9f\u969b\u306e\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3092\u898b\u308b\u3068\u5206\u304b\u308a\u3084\u3059\u3044\u304b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-dart\" data-lang=\"Dart\"><code>\/\/ \u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u3092\u5229\u7528\u3057\u305f\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\nclass Order {\n  String id;\n  List&lt;String&gt; items = [];\n  \n  Order add(String item) {\n    items.add(item);\n    return this;\n  }\n  \n  void printOrder() {\n    print(&quot;Order ID: $id&quot;);\n    print(&quot;Items:&quot;);\n    for (var item in items) {\n      print(&quot;- $item&quot;);\n    }\n  }\n}\n\nvoid main() {\n  var order = Order()\n    ..id = &quot;123&quot;\n    ..add(&quot;Item 1&quot;)\n    ..add(&quot;Item 2&quot;)\n    ..add(&quot;Item 3&quot;);\n  \n  order.printOrder();\n}<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u3001<code>Order<\/code>\u3068\u3044\u3046\u30af\u30e9\u30b9\u304c\u3042\u308a\u3001<code>add<\/code>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30a2\u30a4\u30c6\u30e0\u3092\u8ffd\u52a0\u3057\u3001<code>printOrder<\/code>\u30e1\u30bd\u30c3\u30c9\u3067\u6ce8\u6587\u306e\u8a73\u7d30\u3092\u8868\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u540c\u3058<code>order<\/code>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5bfe\u3059\u308b\u8907\u6570\u306e\u64cd\u4f5c\u3092\u9023\u7d9a\u3057\u3066\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001<code>add<\/code>\u30e1\u30bd\u30c3\u30c9\u3092\u9023\u7d9a\u3057\u3066\u547c\u3073\u51fa\u3057\u3001\u8907\u6570\u306e\u30a2\u30a4\u30c6\u30e0\u3092\u8ffd\u52a0\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u3092\u4f7f\u7528\u3057\u306a\u3044\u5834\u5408\u3001\u30cd\u30b9\u30c8\u3057\u305f\u547c\u3073\u51fa\u3057\u3092\u884c\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001\u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u3092\u4f7f\u7528\u305b\u305a\u306b\u540c\u3058\u64cd\u4f5c\u3092\u884c\u3046\u5834\u5408\u306e\u30b3\u30fc\u30c9\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-dart\" data-lang=\"Dart\"><code>\/\/ \u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u3092\u4f7f\u308f\u306a\u3044\u5834\u5408\nvoid main() {\n  var order = Order();\n  order.id = &quot;123&quot;;\n  order.add(&quot;Item 1&quot;);\n  order.add(&quot;Item 2&quot;);\n  order.add(&quot;Item 3&quot;);\n  \n  order.printOrder();\n}<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u7d50\u679c\u306f\u4e00\u76ee\u77ad\u7136\u3060\u3068\u601d\u3044\u307e\u3059\u3002\u7a4d\u6975\u7684\u306b\u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u3092\u5229\u7528\u3057\u305f\u304f\u306a\u308a\u307e\u3059\u304c\u3001\u30c7\u30e1\u30ea\u30c3\u30c8\u304c\u6c17\u306b\u306a\u308a\u307e\u3059\u3002\u3069\u3046\u3044\u3063\u305f\u30c7\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308b\u306e\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%82%AB%E3%82%B9%E3%82%B1%E3%83%BC%E3%83%89%E8%A8%98%E6%B3%95%E3%81%AE%E3%83%87%E3%83%A1%E3%83%AA%E3%83%83%E3%83%88%E3%81%AF%E3%81%82%E3%82%8B%E3%81%AE%E3%81%8B%EF%BC%9F\"><\/span>\u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u306e\u30c7\u30e1\u30ea\u30c3\u30c8\u306f\u3042\u308b\u306e\u304b\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30e1\u30bd\u30c3\u30c9\u623b\u308a\u5024\u306e\u5229\u7528\u5236\u9650<\/strong>: \u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u3067\u306f\u3001\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u3067\u306f\u306a\u304f\u3001<span class=\"marker-under-red\">\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u81ea\u4f53\u3092\u8fd4\u3059\u305f\u3081\u3001\u4e00\u90e8\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u5229\u7528\u3059\u308b\u969b\u306b\u5236\u9650\u304c\u751f\u3058\u307e\u3059<\/span>\u3002\u30ab\u30b9\u30b1\u30fc\u30c9\u30c1\u30a7\u30fc\u30f3\u306e<span class=\"marker-under-red\">\u9014\u4e2d\u3067\u5024\u3092\u53d6\u5f97\u3057\u305f\u308a\u3001\u5225\u306e\u30e1\u30bd\u30c3\u30c9\u306b\u6e21\u3059\u5834\u5408\u306b\u306f\u5236\u9650\u304c\u3042\u308a<\/span>\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u5185\u3067\u6761\u4ef6\u306b\u57fa\u3065\u3044\u305f\u51e6\u7406\u3092\u884c\u3046\u5834\u5408\u3084\u3001\u5024\u3092\u4ed6\u306e\u5909\u6570\u306b\u4ee3\u5165\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u306b\u306f\u5236\u9650\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30c7\u30d0\u30c3\u30b0\u306e\u56f0\u96e3\u3055<\/strong>: \u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u8907\u6570\u306e\u30e1\u30bd\u30c3\u30c9\u547c\u3073\u51fa\u3057\u304c\u9023\u7d9a\u3057\u3066\u884c\u308f\u308c\u308b\u305f\u3081\u3001\u30c7\u30d0\u30c3\u30b0\u304c\u56f0\u96e3\u306b\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u7279\u306b\u3001<span class=\"marker-under-red\">\u30ab\u30b9\u30b1\u30fc\u30c9\u30c1\u30a7\u30fc\u30f3\u304c\u9577\u304f\u306a\u308b\u3068\u3001\u3069\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u3069\u306e\u6642\u70b9\u3067\u547c\u3073\u51fa\u3055\u308c\u3066\u3044\u308b\u306e\u304b\u628a\u63e1\u3059\u308b\u3053\u3068\u304c\u96e3\u3057\u304f\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059<\/span>\u3002\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306b\u306f\u3001\u30ab\u30b9\u30b1\u30fc\u30c9\u30c1\u30a7\u30fc\u30f3\u306e\u4e2d\u3067\u306e\u7279\u5b9a\u306e\u64cd\u4f5c\u306e\u30c8\u30e9\u30c3\u30ad\u30f3\u30b0\u3084\u30c7\u30d0\u30c3\u30b0\u304c\u56f0\u96e3\u306b\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u53ef\u8aad\u6027\u306e\u4f4e\u4e0b<\/strong>: \u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u306f<span class=\"marker-under-red\">\u77ed\u3044\u64cd\u4f5c\u306e\u5834\u5408\u306b\u306f\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3092\u5411\u4e0a\u3055\u305b\u307e\u3059\u304c\u3001\u9577\u3044\u30ab\u30b9\u30b1\u30fc\u30c9\u30c1\u30a7\u30fc\u30f3\u3092\u6301\u3064\u5834\u5408\u306b\u306f\u9006\u52b9\u679c\u3068\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059<\/span>\u3002\u8907\u6570\u306e\u30e1\u30bd\u30c3\u30c9\u547c\u3073\u51fa\u3057\u304c\u9023\u7d9a\u3057\u3066\u884c\u308f\u308c\u308b\u3068\u3001\u30b3\u30fc\u30c9\u306e\u7406\u89e3\u304c\u96e3\u3057\u304f\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u7279\u306b\u3001\u30ab\u30b9\u30b1\u30fc\u30c9\u30c1\u30a7\u30fc\u30f3\u5185\u3067\u6761\u4ef6\u5206\u5c90\u3084\u30eb\u30fc\u30d7\u304c\u542b\u307e\u308c\u308b\u5834\u5408\u306b\u306f\u3001\u53ef\u8aad\u6027\u304c\u4f4e\u4e0b\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u306f\u30b3\u30fc\u30c9\u306e\u77ed\u7e2e\u3084\u53ef\u8aad\u6027\u5411\u4e0a\u306b\u5f79\u7acb\u3064\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u30c7\u30e1\u30ea\u30c3\u30c8\u3082\u5b58\u5728\u3057\u307e\u3059\u3002\u9069\u5207\u306a\u4f7f\u7528\u65b9\u6cd5\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3042\u308a\u3001\u7279\u306b\u53ef\u8aad\u6027\u3084\u30c7\u30d0\u30c3\u30b0\u53ef\u80fd\u6027\u3092\u8003\u616e\u3057\u306a\u304c\u3089\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3084\u30c1\u30fc\u30e0\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u30b9\u30bf\u30a4\u30eb\u30ac\u30a4\u30c9\u306b\u57fa\u3065\u3044\u3066\u3001\u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u306e\u4f7f\u7528\u3092\u5224\u65ad\u3059\u308b\u3053\u3068\u304c\u63a8\u5968\u3055\u308c\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u307f\u306a\u3055\u3093\u306fDart\u8a00\u8a9e\u3092\u3084\u3063\u3066\u3044\u3066\u300c..\u300d\u3068\u3044\u3063\u305f\u3088\u3046\u306b\u3001\u30c9\u30c3\u30c8\u306e\u9023\u7d9a\u304c\u30b3\u30fc\u30c9\u5185\u306b\u767b\u5834\u3059\u308b\u3053\u3068\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b\uff1fJavaScript\u3070\u304b\u308a\u3084\u3063\u3066\u3044\u305f\u306e\u3067\u5c11\u3057\u76ee\u65b0\u3057\u304b\u3063\u305f\u306e\u3067\u3001\u7686\u3055\u3093\u306e\u304a\u5f79\u306b\u7acb\u3066\u308b\u304b\u306a\u3068\u601d\u3044\u3001\u3053\u306e\u8a18\u4e8b\u3092\u307e\u3068 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":6177,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rop_custom_images_group":[],"rop_custom_messages_group":[],"rop_publish_now":"initial","rop_publish_now_accounts":[],"rop_publish_now_history":[],"rop_publish_now_status":"pending","_themeisle_gutenberg_block_has_review":false,"sitemap_hide":"","_veu_custom_css":"","veu_display_promotion_alert":"","vkexunit_cta_each_option":"","footnotes":""},"categories":[45],"tags":[47,36,39,48],"class_list":["post-6166","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-flutter","tag-dart","tag-flutter","tag-39","tag-48"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>\u3010Flutter\u3011Dart\u8a00\u8a9e\u306b\u304a\u3051\u308b\u30ab\u30b9\u30b1\u30fc\u30c9\u8a18\u6cd5\u306b\u3064\u3044\u3066\u306e\u307e\u3068\u3081\u3068\u89e3\u8aac\u3002\u5229\u7528\u3059\u308b\u3068\u3053\u3093\u306a\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308a\u307e\u3059 | QooTechWEB-\u958b\u767a\u30ed\u30b0\u30fb\u5b9f\u52d9\u8a18\u9332\u30d6\u30ed\u30b0<\/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:\/\/engineering.webstudio168.jp\/blog\/flutter-dart-cascade-notation\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" 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content=\"\u307f\u306a\u3055\u3093\u306fDart\u8a00\u8a9e\u3092\u3084\u3063\u3066\u3044\u3066\u300c..\u300d\u3068\u3044\u3063\u305f\u3088\u3046\u306b\u3001\u30c9\u30c3\u30c8\u306e\u9023\u7d9a\u304c\u30b3\u30fc\u30c9\u5185\u306b\u767b\u5834\u3059\u308b\u3053\u3068\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b\uff1fJavaScript\u3070\u304b\u308a\u3084\u3063\u3066\u3044\u305f\u306e\u3067\u5c11\u3057\u76ee\u65b0\u3057\u304b\u3063\u305f\u306e\u3067\u3001\u7686\u3055\u3093\u306e\u304a\u5f79\u306b\u7acb\u3066\u308b\u304b\u306a\u3068\u601d\u3044\u3001\u3053\u306e\u8a18\u4e8b\u3092\u307e\u3068 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/engineering.webstudio168.jp\/blog\/flutter-dart-cascade-notation\/\" \/>\n<meta property=\"og:site_name\" content=\"QooTechWEB-\u958b\u767a\u30ed\u30b0\u30fb\u5b9f\u52d9\u8a18\u9332\u30d6\u30ed\u30b0\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/kenichi.yoshimura.735\/\" \/>\n<meta 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