Module function/memoize/with

memoizeWith

• memoizeWith<T>(getCache: CacheFunc, hasher: Hasher, fn: T): T
• memoizeWith(getCache: CacheFunc, hasher: Hasher): <T>(fn: T) => T
• memoizeWith(getCache: CacheFunc): { <T>(hasher: Hasher, fn: T): T; (hasher: Hasher): <T>(fn: T) => T }

• memoizeWith is a memoize function fabric. It has simple classic memoization signature. Use it to build your own memoization function.

  It takes three params:

  1. function that will be used to create cache object. Cache must have three methods - get, has, set. So it's compatible with Map, WeakMap, LRU (https://www.npmjs.com/package/lru-cache) instances.
  2. function that will be used to create hash key for cache lookup. It is invoked with arguments for result function.
  3. function, that will be memoized.

  example

   const createCache = () => new Map();
   const hasher = (...args) => JSON.stringify(args);
   const memoize = memoizeWith(createCache, hasher);
  
   const add = (a,b) => a + b;
   const memoizeAdd = memoize(add);
   const sum = add(1,3); // from original add call
   const sum = add(1,4); // from original add call
   const sum = add(1,3); // from cache
  

  Type parameters

  • T: Function

  Parameters

  • getCache: CacheFunc

  • hasher: Hasher

    creates hash for given arguments

  • fn: T

  Returns T

• memoizeWith is a memoize function fabric. It has simple classic memoization signature. Use it to build your own memoization function.

  It takes three params:

  1. function that will be used to create cache object. Cache must have three methods - get, has, set. So it's compatible with Map, WeakMap, LRU (https://www.npmjs.com/package/lru-cache) instances.
  2. function that will be used to create hash key for cache lookup. It is invoked with arguments for result function.
  3. function, that will be memoized.

  example

   const createCache = () => new Map();
   const hasher = (...args) => JSON.stringify(args);
   const memoize = memoizeWith(createCache, hasher);
  
   const add = (a,b) => a + b;
   const memoizeAdd = memoize(add);
   const sum = add(1,3); // from original add call
   const sum = add(1,4); // from original add call
   const sum = add(1,3); // from cache
  

  Parameters

  • getCache: CacheFunc

  • hasher: Hasher

    creates hash for given arguments

  Returns <T>(fn: T) => T

  • • <T>(fn: T): T

    • Type parameters

      • T: Function

      Parameters

      • fn: T

      Returns T

• memoizeWith is a memoize function fabric. It has simple classic memoization signature. Use it to build your own memoization function.

  It takes three params:

  1. function that will be used to create cache object. Cache must have three methods - get, has, set. So it's compatible with Map, WeakMap, LRU (https://www.npmjs.com/package/lru-cache) instances.
  2. function that will be used to create hash key for cache lookup. It is invoked with arguments for result function.
  3. function, that will be memoized.

  example

   const createCache = () => new Map();
   const hasher = (...args) => JSON.stringify(args);
   const memoize = memoizeWith(createCache, hasher);
  
   const add = (a,b) => a + b;
   const memoizeAdd = memoize(add);
   const sum = add(1,3); // from original add call
   const sum = add(1,4); // from original add call
   const sum = add(1,3); // from cache
  

  Parameters

  • getCache: CacheFunc

  Returns { <T>(hasher: Hasher, fn: T): T; (hasher: Hasher): <T>(fn: T) => T }

  • • <T>(hasher: Hasher, fn: T): T
    • (hasher: Hasher): <T>(fn: T) => T

    • Type parameters

      • T: Function

      Parameters

      • hasher: Hasher

      • fn: T

      Returns T

    • Parameters

      • hasher: Hasher

      Returns <T>(fn: T) => T

      • • <T>(fn: T): T

        • Type parameters

          • T: Function

          Parameters

          • fn: T

          Returns T