ramda/src/memoizeWith.js

var _arity =
/*#__PURE__*/
require("./internal/_arity");

var _curry2 =
/*#__PURE__*/
require("./internal/_curry2");

var _has =
/*#__PURE__*/
require("./internal/_has");
/**
 * Creates a new function that, when invoked, caches the result of calling `fn`
 * for a given argument set and returns the result. Subsequent calls to the
 * memoized `fn` with the same argument set will not result in an additional
 * call to `fn`; instead, the cached result for that set of arguments will be
 * returned.
 *
 *
 * @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`.
 * @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;