Iterate over a jQuery object, executing a function for each matched element.
.each(function)
function
type: Function(Integer index, Element element)
a function to execute for each matched element
When called it iterates over the DOM elements that are part of the jQuery object.Each time the callback runs, it is passed the current loop iteration,begginning from 0.
the callback is fired in the context of the current DOM element, so the keyword this refers to the element.this == element
example:
<ul>
<li>foo</li>
<li>bar</li>
</ul>
$(‘li‘).each(function(index){
console.log(index + ": " + $(this).text());
})
输出：
0: foo
1: bar
you can stop the loop from within the callback function by returning false.
$( "div" ).each(function( index, element ) { // element == this $( element ).css( "backgroundColor", "yellow" ); if ( $( this ).is( "#stop" ) ) { $( "span" ).text( "Stopped at div index #" + index ); return false; } });
原文：http://www.cnblogs.com/carolina/p/5486110.html