Примеры для jQuery.grep()

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Filters the original array of numbers leaving that are not 5 and have an index greater than 4. Then it removes all 9s.

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<!doctype html>
<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>
 
<script>
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>
 
</body>
</html>

Демонстрация:

Filter an array of numbers to include only numbers bigger then zero.

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$.grep( [ 0, 1, 2 ], function( n, i ) {
  return n > 0;
});

Result:

1
 
[ 1, 2 ]

Filter an array of numbers to include numbers that are not bigger than zero.

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$.grep( [ 0, 1, 2 ], function( n, i ) {
    return n > 0;
}, true );

Result:

1
 
[ 0 ]