01. Word Tracker Associative Arrays

function store(input) {
    let words = input
        .shift()
        .split(' ');
    let wordsCount = {};
    for (let word of words) {
        wordsCount[word] = 0;
    }
    for (let i = 0; i < input.length; i++) {
        if (wordsCount.hasOwnProperty(input[i])) {
            wordsCount[input[i]]++;
        }

    }
    let sorted = Object.entries(wordsCount).sort((firstPair, secondPair) => {
        let [firstWord, firstOccurence] = firstPair;
        let [secondWord, secondOccurence] = secondPair;
        return secondOccurence - firstOccurence;
    });
    sorted.forEach(element => {
        console.log(`${element.join(' - ')}`);
    });
}