Starter template for the Tech Pulse weekly newsletter issue #2 - 25/04/2026

techpulse_#2.js

/**
  QUESTION
  Write a function findFirstUnique(input) that takes a string and returns the index of the first character 
  that does not repeat anywhere else in the string. If every character repeats, return -1

 * @param {string} s
 * @return {number}
 */
function findFirstUnique(s) {
  // Your logic here
}

// Test cases
console.log(findFirstUnique("developer")); // Expected: 0
console.log(findFirstUnique("swiss"));     // Expected: 1
console.log(findFirstUnique("aabb"));      // Expected: -1