Trevor thibblen

I tried to write a function that would flatten nested arrays but my solution did not work when I used the Array.prototype.concat method. As a work around, I used the Array.prototype.forEach method and it worked as expected. Both implimentations are below.
Does you know why .concat() doesn't work?

	var _ext = {};
	var _ = require('underscore');
	_ext = _.extend(_ext, require('./one'));
	_ext = _.extend(_ext, require('./two'));
	module.exports = _ext;


	sp_configure 'show advanced options', 1;
	GO
	sp_configure 'lightweight pooling', 0;
	GO
	RECONFIGURE;
	GO

	var data = $(form).serialize();
	var url = $(form).attr('action');

	$.ajax({
	type: 'POST',
	url: url,
	cache: false,
	data: data,
	success: function (result) {
	$(form).closest('.element').html(result);

	public class FormQuestion
	{
	public decimal sort { get; set; }
	public bool IsAmount { get; set; }
	public bool IsLevelBreak { get; set; }

	[JsonIgnore]
	[DisplayName("Check to delete.")]
	public bool Delete { get; set; }