Sha256: 97db10d8fa61943eda7ec4b9ac1649f45127b67eee8f9328e5155bb02cc5ec67

Contents?: true

Size: 1.07 KB

Versions: 27

Compression:

Stored size: 1.07 KB

Contents

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Tobias Koppers @sokra
*/
"use strict";

const mergeCache = new WeakMap();

/**
 * Merges two given objects and caches the result to avoid computation if same objects passed as arguments again.
 * @example
 * // performs Object.assign(first, second), stores the result in WeakMap and returns result
 * cachedMerge({a: 1}, {a: 2})
 * {a: 2}
 *  // when same arguments passed, gets the result from WeakMap and returns it.
 * cachedMerge({a: 1}, {a: 2})
 * {a: 2}
 * @param {object} first first object
 * @param {object} second second object
 * @returns {object} merged object of first and second object
 */
const cachedMerge = (first, second) => {
	let innerCache = mergeCache.get(first);
	if (innerCache === undefined) {
		innerCache = new WeakMap();
		mergeCache.set(first, innerCache);
	}
	const prevMerge = innerCache.get(second);
	if (prevMerge !== undefined) return prevMerge;
	const newMerge = Object.assign({}, first, second);
	innerCache.set(second, newMerge);
	return newMerge;
};

module.exports = cachedMerge;

Version data entries

27 entries across 26 versions & 9 rubygems

Version Path
optimacms-0.1.61 spec/dummy/node_modules/webpack/lib/util/cachedMerge.js
disco_app-0.18.0 test/dummy/node_modules/webpack/lib/util/cachedMerge.js
disco_app-0.18.2 test/dummy/node_modules/webpack/lib/util/cachedMerge.js
disco_app-0.16.1 test/dummy/node_modules/webpack/lib/util/cachedMerge.js
disco_app-0.15.2 test/dummy/node_modules/webpack/lib/util/cachedMerge.js
disco_app-0.18.4 test/dummy/node_modules/webpack/lib/util/cachedMerge.js
disco_app-0.18.1 test/dummy/node_modules/webpack/lib/util/cachedMerge.js
disco_app-0.12.7.pre.puma.pre.3 test/dummy/node_modules/webpack/lib/util/cachedMerge.js
disco_app-0.14.0 test/dummy/node_modules/webpack/lib/util/cachedMerge.js
disco_app-0.13.6.pre.puma.pre.3 test/dummy/node_modules/webpack/lib/util/cachedMerge.js
tang-0.2.1 spec/tang_app/node_modules/webpack/lib/util/cachedMerge.js
groonga-client-model-6.0.0 test/apps/rails6.0.3.5/node_modules/webpack/lib/util/cachedMerge.js
groonga-client-model-6.0.0 test/apps/rails6.1.3/node_modules/webpack/lib/util/cachedMerge.js
ruby2js-4.0.4 lib/tasks/testrails/node_modules/webpack/lib/util/cachedMerge.js
ruby2js-4.0.3 lib/tasks/testrails/node_modules/webpack/lib/util/cachedMerge.js
tang-0.2.0 spec/tang_app/node_modules/webpack/lib/util/cachedMerge.js
tang-0.1.0 spec/tang_app/node_modules/webpack/lib/util/cachedMerge.js
tang-0.0.9 spec/tang_app/node_modules/webpack/lib/util/cachedMerge.js
enju_library-0.3.8 spec/dummy/node_modules/webpack/lib/util/cachedMerge.js
jester-data-8.0.0 node_modules/webpack/lib/util/cachedMerge.js