回答編集履歴
1
読みやすく修正。
answer
CHANGED
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@@ -1,4 +1,4 @@
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1
1
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`(v, k)` は `(currentValue, index)` なので `k`には0からの連番が入ります。
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2
2
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3
3
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【Array.prototype.map() - JavaScript | MDN】
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4
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-
https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Array/map#%E5%BC%95%E6%95%B0
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4
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+
[https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Array/map#%E5%BC%95%E6%95%B0](https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Array/map#%E5%BC%95%E6%95%B0)
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