while 文 繰り返し処理を行う「最も基本となる文」です。 原始的故にコードの記述量は多くなりますが、処理速度は基本的に最速です。 /** * 1~10の繰り返し処理 */ var i = 0; while (i < 10) { console.log(i++); } /** * 配列の繰り返し処理 */ var array = ['a', 'b', 'c', 'd', 'e', 'f'], i = 0, len = array.length; while (i < len) { console.log(array[i++]); } /** * イテレータの繰り返し処理 */ var mapIterator = new Map([[0, 'a'], [1, 'b'], [2, 'c'], [3, 'd'], [4, 'e']]).entries(), iteratorResult; wh
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