text: /**
   * Given a sorted array, find the index of the element with the given value.
   * Time complexity should be O(logN)
   *
   * @param {Array} array
   * @param {Number} value
   * @return {Number}
   *
   * @example
   * For ([1, 2, 3], 1) should return 0
   * For ([1, 2, 3], 2) should return 1
   *
   */
  function findIndex(array, value) {
    let left = 0;
    let right = array.length - 1;
  
    while (left <= right) {
      const center = Math.floor((left + right) / 2);
  
      if (array[center] === value) {
        return center;
      }
  
      if (array[center] < value) {
        left = center + 1;
      } else {
        right = center - 1;
      }
    }
  
    return -1;
  }
  
  module.exports = findIndex;
  