You may encounter some strange things when comparing single-item Arrays with other things in JavaScript.

weird-array-comparisons.js

[1] == [1];
    // false

[1] == 1;
    // true

[1] === 1;
    // false

[1] == '1';
    // true

[1, 1] == 1;
    // false (of course?)

[1, 1] == '1,1';
    // true

// and then it gets weird:
[true] == true;
    // false; but compare with:
true == true;
    // true (sanity check...)
[true] == 'true';
    // true (there's that valueOf/toString again)
    // now...
[1] == true;
    // true
['1'] == true;
    // true
[''] == false;
    // true
[0] == false;
    // true

@see http://notundefined.tumblr.com/post/3208290434/the-pleasures-and-perils-of-javascripts-promiscuous