如何从数组中的 object 中获取值并将它们放入列中的数组中？

Question

我有一个查询，它返回两列的值、 name和win ，如下所示：

[
  RowDataPacket { name: 'mattia', win: 45 },
  RowDataPacket { name: 'mauro', win: 32 },
  RowDataPacket { name: 'valerio', win: 30 },
  RowDataPacket { name: 'luca', win: 29 },
  RowDataPacket { name: 'lorenzo', win: 26 },
  RowDataPacket { name: 'stefano', win: 25 },
  RowDataPacket { name: 'armando', win: 16 },
  RowDataPacket { name: 'marco', win: 12 },
  RowDataPacket { name: 'francesco', win: 10 },
  RowDataPacket { name: 'antonio', win: 5 }
]

我想获取每个值并将其按值的顺序放入一个数组中，然后将它们放入列中。 我尝试使用.map但无法使其正常工作

Answer 1

这是你要找的吗？

 const results = [ { name: 'mattia', win: 45 }, { name: 'mauro', win: 32 }, { name: 'valerio', win: 30 }, { name: 'luca', win: 29 }, { name: 'lorenzo', win: 26 }, { name: 'stefano', win: 25 }, { name: 'armando', win: 16 }, { name: 'marco', win: 12 }, { name: 'francesco', win: 10 }, { name: 'antonio', win: 5 } ]; // solution #1 - every map iterates over the whole array (2x iterations) const names = results.map(result => result.name); const wins = results.map(result => result.win); console.log('names', names); console.log('wins', wins); // solution #2 - iterates once over the array const { namesArr, winsArr } = results.reduce((accumulator, currentValue) => { const { name, win } = currentValue; const { namesArr, winsArr } = accumulator; return { namesArr: [...namesArr, name], winsArr: [...winsArr, win] }; }, { namesArr: [], winsArr: [] }) console.log('names2', namesArr); console.log('wins2', winsArr);