Function checkNeighbors

javascript/0269-alien-dictionary.js:72–87

(queue, frequencyMap, graph, buffer)

};

var checkNeighbors = (queue, frequencyMap, graph, buffer) => {
    const char = queue.dequeue();

    buffer.push(char);

    for (const next of graph.get(char)) {
        const value = frequencyMap.get(next) - 1;

        frequencyMap.set(next, value);

        const isEmpty = frequencyMap.get(next) === 0;
        if (!isEmpty) continue;

        queue.enqueue(next);
    }
};

const queueSources = (queue, frequencyMap) => {
    for (const [key, value] of frequencyMap) {