Function _fnMap

external/.datatables.js:5844–5864

* See if a property is defined on one object, if so assign it to the other object * @param {object} ret target object * @param {object} src source object * @param {string} name property * @param {string} [mappedName] name to map too - optional, name used if not given * @memberof DataT

(ret, src, name, mappedName)

	 *  @memberof DataTable#oApi
	 */
	function _fnMap(ret, src, name, mappedName) {
		if (Array.isArray(name)) {
			$.each(name, function (i, val) {
				if (Array.isArray(val)) {
					_fnMap(ret, src, val[0], val[1])
				} else {
					_fnMap(ret, src, val)
				}
			})

			return
		}

		if (mappedName === undefined) {
			mappedName = name
		}

		if (src[name] !== undefined) {
			ret[mappedName] = src[name]
		}
	}

	/**
	 * Extend objects - very similar to jQuery.extend, but deep copy objects, and