var baseMerge = require('./_baseMerge'),
    createAssigner = require('./_createAssigner');

/**
 * This method is like `_.assign` except that it recursively merges own and
 * inherited enumerable properties of source objects into the destination
 * object. Source properties that resolve to `undefined` are skipped if a
 * destination value exists. Array and plain object properties are merged
 * recursively.Other objects and value types are overridden by assignment.
 * Source objects are applied from left to right. Subsequent sources
 * overwrite property assignments of previous sources.
 *
 * **Note:** This method mutates `object`.
 *
 * @static
 * @memberOf _
 * @category Object
 * @param {Object} object The destination object.
 * @param {...Object} [sources] The source objects.
 * @returns {Object} Returns `object`.
 * @example
 *
 * var users = {
 *   'data': [{ 'user': 'barney' }, { 'user': 'fred' }]
 * };
 *
 * var ages = {
 *   'data': [{ 'age': 36 }, { 'age': 40 }]
 * };
 *
 * _.merge(users, ages);
 * // => { 'data': [{ 'user': 'barney', 'age': 36 }, { 'user': 'fred', 'age': 40 }] }
 */
var merge = createAssigner(function(object, source, srcIndex) {
  baseMerge(object, source, srcIndex);
});

module.exports = merge;