回答編集履歴
1
出力が質問と異なっていたので修正
answer
CHANGED
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@@ -3,13 +3,13 @@
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3
3
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```JavaScript
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4
4
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const arr = [{a: 1, b: 2, c: 3}, {a: 4, b: 5, d: 6}];
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5
5
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6
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-
const result = arr.reduce((result, value) => {
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6
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+
const result = [arr.reduce((result, value) => {
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7
7
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Object.keys(value).forEach(key =>
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(result[key] ?? (result[key] = [])).push(value[key])
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);
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return result;
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-
}, {});
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11
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+
}, {})];
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12
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console.log(JSON.stringify(result));
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14
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-
// => {"a":[1,4],"b":[2,5],"c":[3],"d":[6]}
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14
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+
// => [{"a":[1,4],"b":[2,5],"c":[3],"d":[6]}]
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15
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```
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