javascript - 根据对象数组中的条件组合对象

Question

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Answer 1

您可以使用 reduce() 并使用对象累加器。最后使用 Object.values 获取数组。

const obj = [ { id: 1, name: "Abc" }, { id: 2, name: "BED" }, { id: 1, name: "FGH" }, { id: 3, name: "RFS" }, { id: 1, name: "TSD" }, { id: 2, name: "BGH" } ]

let res = Object.values(obj.reduce((ac,a) => {
  if(!ac[a.id]) ac[a.id] = [];
  ac[a.id].push(a);
  return ac;
},{}))

console.log(res)

使用for...of

const obj = [ { id: 1, name: "Abc" }, { id: 2, name: "BED" }, { id: 1, name: "FGH" }, { id: 3, name: "RFS" }, { id: 1, name: "TSD" }, { id: 2, name: "BGH" } ]

let res = {};

for(let item of obj){
  if(!res[item.id]) res[item.id] = [];
  res[item.id].push(item);
}

console.log(Object.values(res))