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-
-
- "use strict";
-
- const mergeCache = new WeakMap();
-
-
- const cachedCleverMerge = (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 = cleverMerge(first, second);
- innerCache.set(second, newMerge);
- return newMerge;
- };
-
-
- const cleverMerge = (first, second) => {
- const newObject = Object.assign({}, first);
- for (const key of Object.keys(second)) {
- if (!(key in newObject)) {
- newObject[key] = second[key];
- continue;
- }
- const secondValue = second[key];
- if (!Array.isArray(secondValue)) {
- newObject[key] = secondValue;
- continue;
- }
- const firstValue = newObject[key];
- if (Array.isArray(firstValue)) {
- const newArray = [];
- for (const item of secondValue) {
- if (item === "...") {
- for (const item of firstValue) {
- newArray.push(item);
- }
- } else {
- newArray.push(item);
- }
- }
- newObject[key] = newArray;
- } else {
- newObject[key] = secondValue;
- }
- }
- return newObject;
- };
-
- exports.cachedCleverMerge = cachedCleverMerge;
- exports.cleverMerge = cleverMerge;
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