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javascript--parameters of a function function in the Replace function of a string

Source: Internet
Author: User
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1<! Doctype>2345<body>6<script type= "Text/javascript" >7             functionTest (s) {8                 varpattern=/& ([^&;] +);/G;9S.replace (Pattern,function(a,b,c,d,e) {Ten alert (a); One alert (b); A alert (c); - alert (d); - alert (e); the                 }); -             } -             varStr= "&lt;&quot;&gt;"; - Test (str); +</script> -</body> +
Test environment: Version 40.0.2214.115 m
Test results:

 
 
    
  
  
       
   
    • A represents the complete substring of the match, such as:&lt;
      •  
   
    • b indicates the successful part of the match, such as: LT
      •  
   
    • c indicates the subscript of the matched complete substring, such as: 0
      •  
   
    • D indicates a test string, such as:&lt;&quot;&gt;
      •  
   
    • E for undefined
      •  
  
    
 
 
About "capturing group" in regular expressions, refers to the regular expression through () the matching pattern is divided into groups, you can get the first capturing group through regexp.$1, Regexp.$2 get the second capturing group, such as:
1<! Doctype>2345<body>6<script type= "Text/javascript" >7             vartext= "111-22-3333";8             varpattern=/(\d{2,})-(\d{2,})-(\d{2,})/G;9             if(pattern.test (text)) {TenAlert (regexp.$1); OneAlert (regexp.$2); AAlert (regexp.$3); -             }         -</script> the</body> -
Output "111", "22", "3333"
 javascript--parameters for function functions in the Replace function of a string

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Related Keywords:
php string replace function function of string replace function argument of function in c javascript replace function callback replace function in c javascript replace all function

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