如何从JavaScript或jQuery中的键/值数组中获取值

Question

I have a JSON string.

var obj = {"cities":[{"city_name":"abc"},{"city_name":"xyz"}]}

How can I get the values for the key city_name , using JavaScript or JQuery, and get another array like:

["abc","xyz"]

I tried many ways but couldn't figure out.

Answer 1

You can use .map

 var obj = {"cities":[{"city_name":"abc"},{"city_name":"xyz"}]} var result = obj.cities.map(function (el) { return el.city_name; }); console.log(result); 

if you use ES2015 you can also use .map with arrow function

var result = obj.cities.map(el => el.city_name);

Example

Answer 2

You can use like:

var newObj = [];
$.each(obj.cities,function(k,v){
  newObj.push(v.city_name);
});
console.log(newObj);