回答編集履歴
1
indexOf
test
CHANGED
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@@ -1,14 +1,4 @@
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1
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1
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+
indexOf, lastIndexOf の返り値が一致しない要素値を出力
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2
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-
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3
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-
2. `String.prototype.replace` の第二引数に関数を指定
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4
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-
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5
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-
3. 変換テーブルを元に置換
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6
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-
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7
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-
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8
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-
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9
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https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/String/replace
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10
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-
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11
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https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Map
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12
2
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13
3
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14
4
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