Algorithms in Javascript: CTCI 1.1 - Is Unique: Write a function to determine if a string has all unique characters.

ctci-1.1-string-has-all-unique-characters.js

const stringHasUniqueChars = (str) => {
  for(let i=0;i<str.length; i++) {
    for(let j=i+1;j<str.length; j++) {
      if(str[i] === str[j])
        return false;
    }
  }
  return true;
}

const s = 'Geeks for Geeks';
const y = stringHasUniqueChars(s);
const x = 'abc';
const z = stringHasUniqueChars(x);
console.log(s + ': ' + y);
console.log(x + ': ' + z);