Cannot read property 'push' of undefined when combining arrays

Question

When pushing an array\'s contents to another array I get

\"Uncaught TypeError: Cannot read property \'push\' of undefined\" error in this snippet.

Answer 1

order is an Object, not an Array().

push() is for arrays.

Refer to this post

Try this though(but your subobjects have to be Arrays()):

var order = new Array();

// initialize order; n = index
order[n] = new Array();

// and then you can perform push()
order[n].push(some_value);

Or you can just use order as an array of non-array objects:

var order = new Array();

order.push(a[n]);