Equivalent of Underscore _.pluck in pure JavaScript

Question

I\'m trying to recreate the Underscore pluck function using pure JS. However, I keep getting an array of undefineds being returned, instead of the actual values from the pr

Answer 1

You are so close. You need to change:

newArr.push(arr[i].key);

to:

newArr.push(arr[i][key]);

---

Consider this:

var obj = { myKey: 'my Value', theKey: 'another value' };
var theKey = 'myKey';

alert(obj.theKey); // another value
alert(obj[theKey]); // my Value
// You can also send in strings here:
alert(obj['theKey']); // another value

Hope you get my point.