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Grokking the Coding Interview Patterns in JavaScript

Solution: Merge Strings Alternately

Understand how to merge two strings by alternating their characters using two pointers. Learn the step-by-step approach to traverse both strings efficiently, handle different string lengths, and analyze the time and space complexity of this method.

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Statement

Given two strings word1 and word2, merge them by interleaving their characters in alternating order, beginning with the first character of word1. If one string is longer than the other, append the remaining characters of the longer string to the end of the merged result.

Return the resulting merged string.

Constraints:

  • 1≤1 \leq word1.length, word2.length ≤100\leq 100

  • word1 and word2 consist of lowercase English letters. ...