text: var _arity = /*#__PURE__*/require('./internal/_arity');
  
  var _curry2 = /*#__PURE__*/require('./internal/_curry2');
  
  var _has = /*#__PURE__*/require('./internal/_has');
  
  /**
   * A customisable version of [`R.memoize`](#memoize). `memoizeWith` takes an
   * additional function that will be applied to a given argument set and used to
   * create the cache key under which the results of the function to be memoized
   * will be stored. Care must be taken when implementing key generation to avoid
   * clashes that may overwrite previous entries erroneously.
   *
   *
   * @func
   * @memberOf R
   * @since v0.24.0
   * @category Function
   * @sig (*... -> String) -> (*... -> a) -> (*... -> a)
   * @param {Function} fn The function to generate the cache key.
   * @param {Function} fn The function to memoize.
   * @return {Function} Memoized version of `fn`.
   * @see R.memoize
   * @example
   *
   *      let count = 0;
   *      const factorial = R.memoizeWith(R.identity, n => {
   *        count += 1;
   *        return R.product(R.range(1, n + 1));
   *      });
   *      factorial(5); //=> 120
   *      factorial(5); //=> 120
   *      factorial(5); //=> 120
   *      count; //=> 1
   */
  
  
  var memoizeWith = /*#__PURE__*/_curry2(function memoizeWith(mFn, fn) {
    var cache = {};
    return _arity(fn.length, function () {
      var key = mFn.apply(this, arguments);
      if (!_has(key, cache)) {
        cache[key] = fn.apply(this, arguments);
      }
      return cache[key];
    });
  });
  module.exports = memoizeWith;