iteragain/dist/es5/internal/ZipLongestIterator.js

Javascript Iterable/Iterator/Generator-function utilities.

var ZipLongestIterator = /** @class */ (function () {
    function ZipLongestIterator(iterators) {
        this.iterators = iterators;
        this.done = new Set();
    }
    ZipLongestIterator.prototype[Symbol.iterator] = function () {
        return this;
    };
    ZipLongestIterator.prototype.next = function () {
        var _a;
        var args = [];
        for (var _i = 0; _i < arguments.length; _i++) {
            args[_i] = arguments[_i];
        }
        var values = [];
        for (var i = 0; i < this.iterators.length; i++) {
            if (!this.done.has(i)) {
                var next = (_a = this.iterators[i]).next.apply(_a, args);
                if (next.done)
                    this.done.add(i);
                values.push(next.value);
            }
            else
                values.push(undefined);
        }
        if (values.length === this.done.size)
            return { done: true, value: undefined };
        return { value: values, done: false };
    };
    return ZipLongestIterator;
}());
export { ZipLongestIterator };
export default ZipLongestIterator;
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