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Versions: 14
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Contents
var arrayEach = require('./arrayEach'),
baseForOwn = require('./baseForOwn'),
baseMergeDeep = require('./baseMergeDeep'),
isArray = require('../lang/isArray'),
isLength = require('./isLength'),
isObjectLike = require('./isObjectLike'),
isTypedArray = require('../lang/isTypedArray');
/**
* The base implementation of `_.merge` without support for argument juggling,
* multiple sources, and `this` binding `customizer` functions.
*
* @private
* @param {Object} object The destination object.
* @param {Object} source The source object.
* @param {Function} [customizer] The function to customize merging properties.
* @param {Array} [stackA=[]] Tracks traversed source objects.
* @param {Array} [stackB=[]] Associates values with source counterparts.
* @returns {Object} Returns the destination object.
*/
function baseMerge(object, source, customizer, stackA, stackB) {
var isSrcArr = isLength(source.length) && (isArray(source) || isTypedArray(source));
(isSrcArr ? arrayEach : baseForOwn)(source, function(srcValue, key, source) {
if (isObjectLike(srcValue)) {
stackA || (stackA = []);
stackB || (stackB = []);
return baseMergeDeep(object, source, key, baseMerge, customizer, stackA, stackB);
}
var value = object[key],
result = customizer ? customizer(value, srcValue, key, object, source) : undefined,
isCommon = typeof result == 'undefined';
if (isCommon) {
result = srcValue;
}
if ((isSrcArr || typeof result != 'undefined') &&
(isCommon || (result === result ? result !== value : value === value))) {
object[key] = result;
}
});
return object;
}
module.exports = baseMerge;
Version data entries
14 entries across 7 versions & 1 rubygems