Question

How to extract only special characters from a string in JavaScript

Answer 1

function extract_only_special_characters(s) {
    var len = s.length; 
    var pecial_characters = ""; 
            
    for (var i = 0; i < len; i++) { 
         ch = s[i]; 
         var regex = /^[0-9a-zA-Z]+$/;
         if (!ch.match(regex)) {
            pecial_characters = pecial_characters + ch; 
         }
    } 
    return pecial_characters; 
} 
 
 
var s = "c++14@vb.net&%JavaScript*() php <>/python 3.7.3"; 
  
document.write(extract_only_special_characters(s));
       
  
  
   
/*
run:
    
++@.&%*() <>/ .. 
       
*/

 

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