Leetcode - 434. Number of Segments in a String

https://leetcode.com/problems/number-of-segments-in-a-string/

/**
 * @param {string} s
 * @return {number}
 */
var countSegments = function (s) {
  if (s.length === 0) {
    return 0;
  }

  let result = s[0] !== ' ' ? 1 : 0;

  for (let i = 0; i < s.length; i++) {
    if (s[i - 1] === ' ' && s[i] !== ' ') {
      result++;
    }
  }

  return result;
};

Runtime: 77 ms, faster than 76.86% of JavaScript online submissions for Number of Segments in a String.

Memory Usage: 42 MB, less than 30.33% of JavaScript online submissions for Number of Segments in a String.