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Grokking the Coding Interview Patterns in JavaScript

Solution: Word Pattern

Explore how to solve the word pattern problem by implementing a hash map-based algorithm. Understand how to ensure a bijection between pattern characters and words in a string, verify mappings, and manage consistency. This lesson helps you learn to apply hash maps effectively for pattern matching with linear time and space complexity.

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Statement

You are given a pattern and a string, s. You need to determine whether the string s follows the same pattern.

A string s is said to follow a pattern if a bijection exists between a character in the pattern and a non-empty word in s.

  • Each character in the pattern must map to exactly one unique word in s.

  • Each word in s must map to exactly one unique character in pattern.

  • No ...