[adatta02]

I'd be more interested in seeing these techniques applied to Javascript that is coded up with a framework (say jQuery for arguments sake).

For example, what is the performance penalty of:

  var arr = [1, 2, 3];
  for(var i=0; i < arr.length; i++){ //stuff }
  // versus
  $.each( arr, function(i, val){ // stuff } );

Or @ caching:

  $("a").each( function(){
    $(this).click(
      $(this).find("img").hide();
    );
  });

  // versus

  $("a").each( function(){
    var targetImage = $(this).find("img");
    $(this).click(
      $(targetImage).hide();
    );
  });