如何仅获取由键数组定义的对象中的值？

Question

I have a simple object with several keys and values:

var obj = {SKA: 267, SKB: 30, SKC: 273, SKD: 900, SKE: 27, SKF: 3}

I also have a array with some keys:

var keysArray = ["SKB", "SKF"]

I know that I can get all values by using Object.values(obj) . However I only need the values of the keys which are defined in the keysArray . So, is there a simple way to get only the values of these keys and save them in a new array?

I need the following result:

var resultArray = [30, 3]

Many thanks.

Answer 1

 keysArray.map(key => obj[key])

Answer 2

var resultArray =[];

keysArray.forEach(function(key){
    if(obj[key]){
        resultArray.push(obj[key]);
    }
});

Answer 3

I will recommend to use loop, like forEach on the keysArray instead of map on keysArray . The reason for this is because map do not work for this:

 var obj = {SKA: 267, SKB: 30, SKC: 273, SKD: 900, SKE: 27, SKF: 3}; var keysArray = ["SKB", "SKF"]; var resultArray = []; keysArray.forEach((key)=>{ resultArray.push(obj[key]); }); console.log(resultArray); 

Here is why map do not fit with what you have asked:

 var obj = {"SKA": 267, "SKB": 30, "SKC": 273, "SKD": 900, "SKE": 27, "SKF": 3}; var keysArray = ["SKB", "SKF"]; keysArray.map(key => obj[key]); console.log(keysArray);