jQuery.grep()方法

<div></div>
<p></p>
<span></span>
<script>
$(function () { 
    var arr = [ 1, 9, 3, 8, 6, 1, 5, 9, 4, 7, 3, 8, 6, 9, 1 ];
    $( "div" ).text( arr.join( ", " ) );
    arr = jQuery.grep(arr, function( n, i ) {
        return ( n !== 5 && i > 4 );
    });
    $( "p" ).text( arr.join( ", " ) ); 
    arr = jQuery.grep(arr, function( a ) {
        return a !== 9;
    });
    $( "span" ).text( arr.join( ", " ) );
})
</script>

$.grep( array, function [, invert ] )