Search⌘ K
AI Features
Home
Courses
Grokking the Coding Interview Patterns in JavaScript

Solution: Check If a Word is a Prefix of Any Word in a Sentence

Explore how to use a trie to check if a given search word is a prefix of any word within a sentence. Learn to insert words into a trie for efficient prefix matching and retrieve the earliest word index where the prefix appears, improving string search performance.

We'll cover the following...

Statement

You are given a sentence containing words separated by single spaces and a searchWord. Your task is to determine whether searchWord is a prefix of any word in the sentence.

Return the 1-based index of the first word in which searchWord appears as a prefix.

  • If searchWord is a prefix of multiple words, return the index of the earliest such word.

  • If no word starts with searchWord, return −1-1.

A prefix of a string is any contiguous substring that begins at the first character.

Constraints:

  • 1<=1 <= ...