704-Binary-Search.js

/**
 * @param {number[]} nums
 * @param {number} target
 * @return {number}
 */
var search = function (nums, target) {
  let left = 0;
  let right = nums.length - 1;
  while (left <= right) {
    let mid = Math.floor((left + right) / 2);
    if (nums[mid] === target) return mid;
    else if (nums[mid] < target) left = mid + 1;
    else right = mid - 1;
  }
  return -1;
};
console.log(search([-1, 0, 3, 5, 9, 12], 2));