@naturalcycles/js-lib/dist-esm/array/range.js

Standard library for universal (browser + Node.js) javascript

import { AsyncIterable2 } from '../iter/asyncIterable2';
import { Iterable2 } from '../iter/iterable2';
export function _range(fromIncl, toExcl, step = 1) {
    if (toExcl === undefined) {
        return Array.from(new Array(fromIncl), (_, i) => i);
    }
    return Array.from({ length: Math.ceil((toExcl - fromIncl) / step) }, (_, i) => i * step + fromIncl);
}
export function _rangeIterable(fromIncl, toExcl, step = 1) {
    if (toExcl === undefined) {
        toExcl = fromIncl;
        fromIncl = 0;
    }
    return Iterable2.of({
        *[Symbol.iterator]() {
            for (let i = fromIncl; i < toExcl; i += step) {
                yield i;
            }
        },
    });
}
export function _rangeAsyncIterable(fromIncl, toExcl, step = 1) {
    if (toExcl === undefined) {
        toExcl = fromIncl;
        fromIncl = 0;
    }
    return AsyncIterable2.of({
        async *[Symbol.asyncIterator]() {
            for (let i = fromIncl; i < toExcl; i += step) {
                yield i;
            }
        },
    });
}