grep过滤

最新推荐文章于 2023-04-28 15:08:22 发布

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最新推荐文章于 2023-04-28 15:08:22 发布

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<html lang="en">
<head>
  <meta charset="utf-8">
  <title>jQuery.grep demo</title>
  <style>
  div {
    color: blue;
  }
  p {
    color: green;
    margin: 0;
  }
  span {
    color: red;
  }
  </style>
  <script src="https://code.jquery.com/jquery-1.10.2.js"></script>
</head>
<body>
 
<div></div>
<p></p>
<span></span>
<a href=""></a>
 
<script>
var arr = [ 1, 9, 3, 8, 6, 1, 5, 9, 4, 7, 3, 8, 6, 9, 1 ];
$( "div" ).text( arr.join( ", " ) );//1, 9, 3, 8, 6, 1, 5, 9, 4, 7, 3, 8, 6, 9, 1
 
arr = jQuery.grep(arr, function( n, i ) {
  return ( n !== 5 && i > 4 );
});
$( "p" ).text( arr.join( ", " ) );//1, 9, 4, 7, 3, 8, 6, 9, 1
 
arr = jQuery.grep(arr, function(n,i) {
  return true;
});
$( "span" ).text( arr.join( ", " ) );//1, 9, 4, 7, 3, 8, 6, 9, 1
arr=jQuery.grep(arr,function(n,i){
    return false;
});
$( "a" ).text( arr.join( ", " ) );//空
</script>
 
</body>
</html>