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-3.js

const stringHasUniqueChars = (str) => {
  let checker = 0; //integer used to represent 32-bit operator
  for (let i = 0; i < str.length; i++) {
    let bitAtIndex = str[i] - 'a';
    if ((checker & (1 << bitAtIndex)) > 0) {
      return false;
    }
    checker = checker | (1<<bitAtIndex);
  }
  return true;
}

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