endless-sequence/index.js

Create never-ending iterators from a limited array

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
function create(generate, initial = []) {
    const data = Array.from(initial);
    function* addNewPart() {
        for (const element of generate(data)) {
            data.push(element);
            yield element;
        }
    }
    function at(index) {
        if (index < data.length)
            return data[index];
        Array.from(addNewPart());
        return at(index);
    }
    function* iterate() {
        yield* data;
        for (;;) {
            yield* addNewPart();
        }
    }
    return {
        at,
        iterate,
        [Symbol.iterator]: iterate,
        get __internal() {
            return {
                get data() {
                    return Array.from(data);
                },
                get length() {
                    return data.length;
                }
            };
        }
    };
}
exports.create = create;
exports.default = create;
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