Question

I have an array of objects. During the loop I append different properties to each entry.

My question – how do I make sure every entry has all the properties of each entry?

Let’s consider this:

var myArray = [{A: 1}, {B: 2}, {C: 3}];

Now I want to run some elegant one-liner to convert this array into:

[{A: 1, B:2, C: 3}, {A: 1, B:2, C: 3}, {A: 1, B:2, C: 3}]

Answer 1

An elegant one-liner is a bit difficult without a library. But if you have some kind of extend function, then it could be:

myArray.map(function(v) { return extend.apply(null, [{}].concat(myArray)); });

The extend function would require several objects (passed as separate arguments) to be combined. Such a function is available in jQuery as jQuery.extend, and underscore.js also has one.