_createCtor.js
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_createCtor.js
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			var baseCreate = require('./_baseCreate'),
			isObject = require('./isObject');

			/**
			* Creates a function that produces an instance of `Ctor` regardless of
			* whether it was invoked as part of a `new` expression or by `call` or `apply`.
			*
			* @private
			* @param {Function} Ctor The constructor to wrap.
			* @returns {Function} Returns the new wrapped function.
			*/
			function createCtor(Ctor) {
			return function() {
			// Use a `switch` statement to work with class constructors. See
			// http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
			// for more details.
			var args = arguments;
			switch (args.length) {
			case 0: return new Ctor;
			case 1: return new Ctor(args[0]);
			case 2: return new Ctor(args[0], args[1]);
			case 3: return new Ctor(args[0], args[1], args[2]);
			case 4: return new Ctor(args[0], args[1], args[2], args[3]);
			case 5: return new Ctor(args[0], args[1], args[2], args[3], args[4]);
			case 6: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]);
			case 7: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]);
			}
			var thisBinding = baseCreate(Ctor.prototype),
			result = Ctor.apply(thisBinding, args);

			// Mimic the constructor's `return` behavior.
			// See https://es5.github.io/#x13.2.2 for more details.
			return isObject(result) ? result : thisBinding;
			};
			}

			module.exports = createCtor;