How to do something different with first element in each loop?

Question

Within an each() loop, is it possible to do something with the first element in particular, not the next ones? Something like this:

$( '.selector').each(function(){
    // if first element found, do something
});

Answer 1

$('.selector').each(function(i, el){
    if ( i === 0) {
       // Will be done to first element.
    }

});