将对象数组转换为具有相似字段值的数组对象

Question

var array = [{"name":"Vani","Id":"1"},{"name":"Random","Id":"1"},{"name":"Random1","Id":"2"},{"name":"Random2","Id":"2"}];

使用基于唯一字段值id的reduce转换为以下对象：

var obj = {"1":[{"name":"Vani","Id":"1"},{"name":"Random","Id":"1"}],"2":[{"name":"Random1","Id":"2"},{"name":"Random2","Id":"2"}]}

Answer 1

您可以使用.reduce()方法来获得所需的输出：

const data = [{"name":"Vani","Id":"1"},{"name":"Random","Id":"1"},{"name":"Random1","Id":"2"},{"name":"Random2","Id":"2"}];

const result = data.reduce((r, c) => {
  r[c.Id] = r[c.Id] || [];
  r[c.Id].push(c);
  return r;
}, {});

console.log(result);

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