我可以从对象中获取一些键值吗？

Question

let source = {a:1, b:2, c:3, d:4, e:5}



let result = (function make('a','c','e'){
    //Who can complete this code?
})()

console.log(result) // {a:1,c:3,e:5}

Answer 1

There are lots of different ways to do this but I would iterate over the object entries with reduce and only return those key/values where the key is one of the function arguments.

 let source = { a: 1, b: 2, c: 3, d: 4, e: 5 }; function filterObj(...args) { return Object.entries(source).reduce((a, [k, v]) => { if (args.includes(k)) a[k] = v; return a; }, {}); } console.log(filterObj('a', 'c', 'e'));