【CoffeeScript】mapの小さなサンプルメモ

メモ

JavaScriptの基本↓

Array.prototype.map() - JavaScript | MDN https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Array/map

サンプル

test.coffee

arr = [1,2,3]
console.log arr.map (element) ->
  element * 2

実行結果

[ 2, 4, 6 ]

JavaScript変換後↓

test.js

  arr = [1,2,3]
  console.log(arr.map(function(element) {
    return element * 2;
  }));