Longest Common Prefix | LeetCode 14

[Written explanation coming soon.]

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Here is the full implementation.

/**
 * @param {string[]} strs
 * @return {string}
 */
let longestCommonPrefix = function(strs) {
  let longest = '';
  if (strs.length === 0) {
    return longest;
  }

  let comparisonWord = strs[0];
  let comparisonIndex = 0;

  for (let comparisonLetter of comparisonWord) {
    for (let i = 1; i < strs.length; i++) {
      let currentWord = strs[i];
      let currentLetter = currentWord.charAt(comparisonIndex);

      if (comparisonIndex > currentWord.length || comparisonLetter !== currentLetter) {
        return longest;
      }
    }
    comparisonIndex++;
    longest += comparisonLetter;
  }

  return longest;
};