javascript - 根据属性的值将对象数组动态拆分为组

Question

<分区>

Answer 1

使用Array#reduce为此:

const input = [{"name":"john","location":"first"},{"name":"steve","location":"first"},{"name":"paul","location":"another"},{"name":"tony","location":"random"},{"name":"ant","location":"random"}];

const group = input.reduce((acc, item) => {
  if (!acc[item.location]) {
    acc[item.location] = [];
  }

  acc[item.location].push(item);
  return acc;
}, {})

console.log(group);

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编辑 1

如果你想迭代结果，你可以使用 for...of 循环和 Object.entries 像这样:

for (let [location, persons] of Object.entries(group)) {
  console.log(location, persons);
  // do your stuff here
}