How can i create an array if it doesn't exist and run a jquery function after it creates an array?

Question

I have a fiddle.

I want to be able to check if an array exists. If it does not exist i need to create it and run a this function.

$('p').live('click', function(){
    $('p').html('yay, it worked! Thankyou!')
}  

That does not work and i know that but i do not know how to check it.

Answer 1

Use a normal if statement instead of the conditional operator:

if(!$.isArray(x)) {
    x = [];
    $('p').live('click', function(){
        $('p').html('yay, it worked! Thankyou!')
    });
}

Note: x must be at least declared (var x;) for this to work.

Reference: if...else, jQuery.isArray

Update: Reading the comments on the other (now deleted answer), did you intend to do something like this?

function doStuff() {
    $('p').html('yay, it worked! Thankyou!');
}

$('p').live('click', doStuff);

if(!$.isArray(x)) {
    x = [];
    doStuff();
}

It's not really clear given the information you provided. You just said run this function and posted a snippet which lets assume that the whole snippet is the code you want to run when the array is created. Please be more precise.