aureooms/js-array

import {slice} from './slice.js';

export function splice(a, ai, aj, b, bi, bj) {
    if (ai === undefined) {
        ai = 0;
    } else if (ai < 0) {
        ai += a.length;
    }

    if (aj === undefined) {
        aj = ai;
    } else if (aj < 0) {
        aj += a.length;
    }

    return Array.prototype.splice.apply(
        a,
        [ai, aj - ai].concat(slice(b, bi, bj)),
    );
}