JavaScript join() 步骤 _JavaScript

JavaScript join() 方法

/**
  * function join(seperator)
  * @param {String} seperator
  * @returns {Array}
  * @memberOf   Array
  * @see     Array
  * @since   Standard ECMA-262 3rd. Edition 
  * @since   Level 2 Document Object Model Core Definition.
  * @see    http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/ecma-script-binding.html     
 */  
Array.prototype.join = function(seperator){return [];};

<html>
<body>

<script type="text/javascript">

var arr = new Array(3);
arr[0] = "George"
arr[1] = "John"
arr[2] = "Thomas"

document.write(arr.join());

document.write("<br />");

document.write(arr.join("."));

</script>

</body>
</html>

查看结果:

George,John,Thomas
George.John.Thomas

var newText = "<span>" + $("p").text().split(" ").join("</span> <span>") + "</span>";

This will put span tags around all the words in you paragraphs, turning

<p>Test is a demo.</p>

into

<p><span>Test</span> <span>is</span> <span>a</span> <span>demo.</span></p>

    var arr = [ "a", "b", "c", "d", "e" ]   

    $("div").text(arr.join(", "));    

    arr = jQuery.map(arr, function(n, i){  
              return (n.toUpperCase() + i);    
          });  


    $("p").text(arr.join(", "));  

    arr = jQuery.map(arr, function (a) { return a + a; });       

    $("span").text(arr.join(", "));

1./*  
2.JScript does not default the separator to “,” if the separator value is undefined.  
3.*/  
4.    var array = [1, 2];   
5.    alert(array.join());   
6.    alert(array.join(undefined));   
7.    alert(array.join('-'));   
8./*  
9.Output:   
10.     IE: 1,2 1undefined2 1-2  
11.     FF: 1,2 1,2 1-2   
12.  Opera: same as FF   
13. Safari: same as FF  
14.*/