hasPairWithSum.js

/**
 * Find if there is a pair of numbers that sum to a given target value.
 *
 * Time Complexity:
 * Space Complexity:
 * Optimal Time Complexity:
 *
 * @param {Array<number>} numbers - Array of numbers to search through
 * @param {number} target - Target sum to find
 * @returns {boolean} True if pair exists, false otherwise
 */
// export function hasPairWithSum(numbers, target) {
//   for (let i = 0; i < numbers.length; i++) {
//     for (let j = i + 1; j < numbers.length; j++) {
//       if (numbers[i] + numbers[j] === target) {
//         return true;
//       }
//     }
//   }
//   return false;
// }

export function hasPairWithSum(numbers, target) {
  for (let i = 0; i < numbers.length; i++) {
    if (numbers[i] + numbers[i + 1] === target) {
      return true
    }
  }

  return false;
}