webpack
Version:
Packs ECMAScript/CommonJs/AMD modules for the browser. Allows you to split your codebase into multiple bundles, which can be loaded on demand. Supports loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.
58 lines (50 loc) • 982 B
JavaScript
/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Ivan Kopeykin @vankop
*/
"use strict";
/**
* @template T
*/
class AppendOnlyStackedSet {
/**
* @param {Set<T>[]} sets an optional array of sets
*/
constructor(sets = []) {
/** @type {Set<T>[]} */
this._sets = sets;
/** @type {Set<T> | undefined} */
this._current = undefined;
}
/**
* @param {T} el element
*/
add(el) {
if (!this._current) {
this._current = new Set();
this._sets.push(this._current);
}
this._current.add(el);
}
/**
* @param {T} el element
* @returns {boolean} result
*/
has(el) {
for (const set of this._sets) {
if (set.has(el)) return true;
}
return false;
}
clear() {
this._sets = [];
if (this._current) this._current.clear();
}
/**
* @returns {AppendOnlyStackedSet<T>} child
*/
createChild() {
return new AppendOnlyStackedSet(this._sets.length ? [...this._sets] : []);
}
}
module.exports = AppendOnlyStackedSet;