回答編集履歴
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reduce
test
CHANGED
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@@ -1 +1,25 @@
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1
1
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`singou[value]`
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-- reduce
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かぶりまけたので別解。宣言だけするのはムダ
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```javascript
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12
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const singou = ["赤","青","黄"].reduce(function(previousValue, currentValue, index, array) {
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previousValue[currentValue] = index;
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return previousValue;
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},{});
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console.dir(singou)
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```
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