1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
var Stack = require('./_Stack'),
arrayEach = require('./_arrayEach'),
assignMergeValue = require('./_assignMergeValue'),
baseMergeDeep = require('./_baseMergeDeep'),
isArray = require('./isArray'),
isObject = require('./isObject'),
isTypedArray = require('./isTypedArray'),
keysIn = require('./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;
}
var props = (isArray(source) || isTypedArray(source)) ? undefined : 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);
}
});
}
module.exports = baseMerge;
|
