回答編集履歴
1
訂正
test
CHANGED
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@@ -12,13 +12,13 @@
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12
12
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13
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```javascript
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15
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-
var goal = start.reduce( (map, [key,
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15
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+
var goal = start.reduce( (map, [key, expenseTitle, ...others]) => (
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map.has(key)
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? map.get(key).array.push(others)
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? map.get(key).arrays.push(others)
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: map.set(key, {expenseTitle
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: map.set(key, {expenseTitle,arrays:[others]})
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, map), new Map);
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