define(['../internal/MapCache', '../lang/isFunction'], function(MapCache, isFunction) {

/** Used as the `TypeError` message for "Functions" methods. */

var FUNC_ERROR_TEXT = 'Expected a function';

/**

* Creates a function that memoizes the result of `func`. If `resolver` is

* provided it determines the cache key for storing the result based on the

* arguments provided to the memoized function. By default, the first argument

* provided to the memoized function is coerced to a string and used as the

* cache key. The `func` is invoked with the `this` binding of the memoized

* function.

*

* **Note:** The cache is exposed as the `cache` property on the memoized

* function. Its creation may be customized by replacing the `_.memoize.Cache`

* constructor with one whose instances implement the ES `Map` method interface

* of `get`, `has`, and `set`. See the

* [ES spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-properties-of-the-map-prototype-object)

* for more details.

*

* @static

* @memberOf _

* @category Function

* @param {Function} func The function to have its output memoized.

* @param {Function} [resolver] The function to resolve the cache key.

* @returns {Function} Returns the new memoizing function.

* @example

*

* var upperCase = _.memoize(function(string) {

* return string.toUpperCase();

* });

*

* upperCase('fred');

* // => 'FRED'

*

* // modifying the result cache

* upperCase.cache.set('fred, 'BARNEY');

* upperCase('fred');

* // => 'BARNEY'

*

* // replacing `_.memoize.Cache`

* var object = { 'user': 'fred' };

* var other = { 'user': 'barney' };

* var identity = _.memoize(_.identity);

*

* identity(object);

* // => { 'user': 'fred' }

* identity(other);

* // => { 'user': 'fred' }

*

* _.memoize.Cache = WeakMap;

* var identity = _.memoize(_.identity);

*

* identity(object);

* // => { 'user': 'fred' }

* identity(other);

* // => { 'user': 'barney' }

*/

function memoize(func, resolver) {

}

// Assign cache to `_.memoize`.

memoize.Cache = MapCache;

return memoize;

});