回答編集履歴
1
chousei
answer
CHANGED
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@@ -1,4 +1,11 @@
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1
1
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```javascript
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2
2
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const result=[...new Set(data.map(x=>x.month))].sort().map(x=>data.filter(y=>y.month==x).sort((x,y)=>x.timestamp<y.timestamp?1:-1)[0]);
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3
3
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console.log(result);
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4
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+
```
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5
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+
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6
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+
ロジック的にはdataを一旦ソートしてObject.entries/valuesすると楽かも
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7
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```javascript
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8
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data.sort((x,y)=>x.month==y.month?(x.timestamp>y.timestamp?1:-1):x.month-y.month);
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9
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const result=Object.values(Object.fromEntries(data.map(x=>[x.month,x])));
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10
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console.log(result);
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4
11
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```
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