Question

How to check if each letter in a string maps to the first letter of a word in another string with Swift

Answer 1

import Foundation

func matchesPattern(_ pattern: String, _ sentence: String) -> Bool {
    let words = sentence
        .split(whereSeparator: { $0.isWhitespace })
        .map(String.init)

    // Length mismatch → automatic failure
    guard pattern.count == words.count else {
        return false
    }

    // Compare each pattern character to the first letter of each word
    for (p, w) in zip(pattern.lowercased(), words) {
        guard let first = w.first?.lowercased().first else {
            return false
        }
        if p != first {
            return false
        }
    }

    return true
}

let pattern = "jpcrg"
let sentence = "java python c rust go"

if matchesPattern(pattern, sentence) {
    print("Pattern matches!")
} else {
    print("Pattern does NOT match.")
}




/*
run:

Pattern matches!

*/

 

70+ SQL courses for beginners and professionals