Question

How to check if a string contains only unique characters in JavaScript

Answer 1

var sort_string = function(s) {
    return s.split('').sort().join('');
};

function contains_unique_chars(s) { 
    s = sort_string(s); 

    for (var i = 0; i < s.length - 1; i++) { 
         if (s[i] === s[i + 1]) {
             return false; 
         } 
    }
    
    return true; 
} 



var s = "abcde"; 
     
if (contains_unique_chars(s)) { 
    document.write("yes");
} 
else { 
       document.write("no");
} 
   

    
/*
run:

aacijprstv 
         
*/

 

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