按不起作用的键对对象数组进行排序

Question

I have this array of objects:

 let ans = [{'a' : 5},{'d' : 3 },{'c' : 0 },{'b' : 4 }]; //Attempt to sort this ans.sort((a,b)=>{ return Object.keys(a)[0] > Object.keys(b)[0]; }); console.log(ans);

Shouldn't this sort function sort it? If not this how to sort this.

Answer 1

The function provided for array.sort() should return a number instead of a boolean. If a > b , then a number greater than 0 should be returned. If a < b , then a number less than 0.

 let ans = [{'a' : 5},{'d' : 3 },{'c' : 0 },{'b' : 4 }]; //Attempt to sort this console.log(ans.sort((a,b)=>{ return Object.keys(a)[0] > Object.keys(b)[0] ? 1 : -1; }));

Answer 2

Alternatively you can use localeCompare

ans.sort((a,b)=>{
    return Object.keys(a)[0].localeCompare(Object.keys(b)[0]);
});