PaulKinlan

const range = function* (stop = 0, step = 1) {
    const shouldStop = (n)=>stop >= 0 ? (n < stop) : (n > stop);
    const interval = (n)=>stop >= 0 ? n + step : n - step;
    let itr = function*() {
        let i = 0;
        while (shouldStop(i)) {
            yield i;
            i = interval(i);
        }
    };

MattMcFarland

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