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- import Stack from './_Stack';
- import arrayEach from './_arrayEach';
- import assignMergeValue from './_assignMergeValue';
- import baseMergeDeep from './_baseMergeDeep';
- import isArray from './isArray';
- import isObject from './isObject';
- import isTypedArray from './isTypedArray';
- import keysIn from './keysIn';
- /**
- * The base implementation of `_.merge` without support for multiple sources.
- *
- * @private
- * @param {Object} object The destination object.
- * @param {Object} source The source object.
- * @param {number} srcIndex The index of `source`.
- * @param {Function} [customizer] The function to customize merged values.
- * @param {Object} [stack] Tracks traversed source values and their merged
- * counterparts.
- */
- function baseMerge(object, source, srcIndex, customizer, stack) {
- if (object === source) {
- return;
- }
- if (!(isArray(source) || isTypedArray(source))) {
- var props = keysIn(source);
- }
- arrayEach(props || source, function(srcValue, key) {
- if (props) {
- key = srcValue;
- srcValue = source[key];
- }
- if (isObject(srcValue)) {
- stack || (stack = new Stack);
- baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
- }
- else {
- var newValue = customizer
- ? customizer(object[key], srcValue, (key + ''), object, source, stack)
- : undefined;
- if (newValue === undefined) {
- newValue = srcValue;
- }
- assignMergeValue(object, key, newValue);
- }
- });
- }
- export default baseMerge;
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