Exercise: Hash Tables Ransom Note

checkMagazine.js

function checkMagazine(magazine, note) {
    // Create a frequency map of words available in the magazine
    const availableWords = new Map();
    for (const word of magazine) {
        const currentCount = availableWords.get(word) ?? 0;
        availableWords.set(word, currentCount + 1);
    }
    // Check if we can form the note using available words
    for (const requiredWord of note) {
        const remainingCount = availableWords.get(requiredWord) ?? 0;
        if (remainingCount === 0) {
            console.log("No");
            return;
        }
        availableWords.set(requiredWord, remainingCount - 1);
    }
    console.log("Yes");
}