JSFiddle - React, Tailwind, and code Playground

by Jessie Lau

JavaScript

function hasUniqueChars(str){
  var c = {}
  var counter = 0;
  for(var i = 0; i < str.length; i++){
  	var cur = str[i];
    if(c[cur]){
    	c[cur]++;
        counter++;
    } 
      else{
      	c[cur] = 1;
      }
  }
	return counter == 1;
}
console.log(hasUniqueChars('askd'));