Question

How to get the repeating characters of a string in JavaScript

Answer 1

function get_repeating_chars(s) { 
    var len = s.length;
    var tmp = "";
             
    for (var i = 0; i < len; i++) { 
       for (var j = i + 1; j < len; j++) { 
           if (s[i] === s[j]) {
               if (tmp.indexOf(s[i]) === -1) {
                   tmp += s[i];
                   break; 
               }
            } 
        } 
    }
    return tmp; 
} 
   
   
s = "abcdeffghijgklmbbbbxzx"; 
         
tmp = get_repeating_chars(s);  
   
document.write(tmp);
 
 
 
     
/*
run:
 
bfgx 
          
*/

 

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