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Grokking the Coding Interview Patterns in JavaScript

Solution: Append Characters to String to Make Subsequence

Explore how to use a greedy two-pointer strategy to determine the minimum characters to append to a source string so a target string becomes its subsequence. Understand the step-by-step process, time and space complexity, and how to implement this solution efficiently in JavaScript.

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Statement

You’re given two strings, source and target, made up of lowercase English letters. Your task is to determine the minimum number of characters that must be appended to the end of the source so that the target becomes a subsequence of the resulting string.

Note: A subsequence is formed by deleting zero or more characters from a string without changing the order of the remaining characters.

Constraints:

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