typescript return array of key based on given value

Question

我想基于给定值返回对象中的键数组

Answer 1

Here's a simple way of doing it with Object.keys() :

const keys = Object.keys(obj2).filter(k => obj2[k] == "02");

This will make keys an array of keys in obj2 whose property is "02" .

Answer 2

You get keys of object using Object.keys() and then filter() the keys which have value equal to given value.

 const obj2 = {a: '01', b: '02', bb: '02', bbb: '02'}; function findKeys(obj,value){ return Object.keys(obj).filter(key => obj[key] === value); } console.log(findKeys(obj2,'02')); //["b","bb","bbb"] console.log(findKeys(obj2,'01')); //["a"]