data-structure-algebra/doubly-linked-list

import assert from 'assert';

import Node from './Node.js';
import _insertBetween from './_insertBetween.js';

/**
 * _insertBefore.
 *
 * @param {Node} x
 * @param {any} value
 */
export default function _insertBefore(x, value) {
    assert(x instanceof Node);
    return _insertBetween(x.prev, x, value);
}