Q: What is array literal notation in javascript and when should you use it? JSLint is giving me this error:

Problem at line 11 character 33: Use the array literal notation [].

var myArray = new Array();

What is array literal notation and why does it want me to use it instead?
It shows here that new Array(); should work fine... is there something I'm missing?

A: Aside from the Crockford argument, jsPerf says that it's faster. http://jsperf.com/new-vs-literal-array-declaration

A: See also: What's wrong with var x = new Array();
Aside from the Crockford argument, I believe it is also due to the fact that other languages have similar data structures that happen to use the same syntax; for example, Python has lists and dictionaries; see the following examples:
// this is a Python list
a = [66.25, 333, 333, 1, 1234.5]

// this is a Python dictionary
tel = {'jack': 4098, 'sape': 4139}

Isn't it neat how Python is also grammatically correct Javascript? (yes, the ending semi-colons are missing, but those aren't required for Javascript, either)
Thus, by reusing common paradigms in programming, we save everyone from having to relearn something that shouldn't have to.

A: array literal notation is where you define a new array using just empty brackets. In your example:
var myArray = [];

It is the "new" way of defining arrays, and I suppose it is shorter/cleaner.
The examples below explain the difference between them:
var a = [],            // these are the same
    b = new Array(),   // a and b are arrays with length 0

    c = ['foo', 'bar'],           // these are the same
    d = new Array('foo', 'bar'),  // c and d are arrays with 2 strings

    // these are different:
    e = [3],             // e.length == 1, e[0] == 3
    f = new Array(3);   // f.length == 3, f[0] == undefined


Reference: What's the difference between "Array()" and "[]" while declaring a JavaScript array?


A: After looking at @ecMode jsperf, I did some further tests.
When using push to add to the array new Array() is considerably faster on Chrome:
http://jsperf.com/new-vs-literal-array-declaration/2
Using index to add is slightly faster for [].
