質問編集履歴
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訂正
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File without changes
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@@ -1,4 +1,5 @@
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```JavaScript
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var data = [1,2,3,4,5];
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data.forEach(function(v,i,a){a[i] = v + 1;});
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console.log(data); //[2,3,4,5,6]
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```
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