会python真的可以为所欲为0(回)
11天前
这里还有人吗1(回)
196天前这里还有人吗0(回)
196天前
每天面对着电脑屏幕，敲打键盘。我所面对的并不只是代码，而是一种生活方式。0(回)
421天前到处都是羊，不想上班0(回)
501天前
鸽子
0(回)
505天前const groupBy = (arr, key) => {
return arr.reduce((prev, curr) => {
(prev[curr[key]] = prev[curr[key]] || []).push(curr);
return prev;
}, {});
}
const arr = [
{ id: 1, name: "Alice", age: 20 },
{ id: 2, name: "Bob", age: 18 },
{ id: 3, name: "Charlie", age: 20 }
];
const result = groupBy(arr, "age");
console.log(result);
/*
{
"18": [{ id: 2, name: "Bob", age: 18 }],
"20": [
{ id: 1, name: "Alice", age: 20 },
{ id: 3, name: "Charlie", age: 20 }
]
}
*/