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Diffstat (limited to 'node_modules/webpack/lib/util/cachedMerge.js')
-rw-r--r-- | node_modules/webpack/lib/util/cachedMerge.js | 35 |
1 files changed, 0 insertions, 35 deletions
diff --git a/node_modules/webpack/lib/util/cachedMerge.js b/node_modules/webpack/lib/util/cachedMerge.js deleted file mode 100644 index 124f647..0000000 --- a/node_modules/webpack/lib/util/cachedMerge.js +++ /dev/null @@ -1,35 +0,0 @@ -/* - 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; |