test-action-debian-package/node_modules/ramda/es/memoizeWith.js

48 lines
1.3 KiB
JavaScript
Raw Normal View History

2020-03-26 14:37:35 +00:00
import _arity from "./internal/_arity.js";
import _curry2 from "./internal/_curry2.js";
import _has from "./internal/_has.js";
/**
* 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];
});
});
export default memoizeWith;