Exercise: Hash Tables Ice Cream Parlor

whatFlavors.js

function whatFlavors(cost, targetAmount) {
    const priceToIndexMap = new Map();
    for (const [currentIndex, currentPrice] of cost.entries()) {
        const neededPrice = targetAmount - currentPrice;
        const displayIndex = currentIndex + 1;
        if (priceToIndexMap.has(neededPrice)) {
            const firstFlavorIndex = priceToIndexMap.get(neededPrice);
            console.log(`${firstFlavorIndex} ${displayIndex}`);
            return;
        }
        priceToIndexMap.set(currentPrice, displayIndex);
    }
}