Function cache

cache<Ts, V, K>(fn, getK): ((...ts) => V)
Wrap fn with a cache indexed by K.
Type Parameters
- Ts extends any[]
- V
- K = Ts[0]
Parameters
- fn: ((...ts) => V)
  
  function to cache
  - - (...ts): V
    - Parameters
      
      Rest ...ts: Ts
      
      Returns V
- getK: ((...ts) => K) | (Ts extends [K]
  ? undefined
  : never)
  
  optional function to extract K from Ts
Returns ((...ts) => V)
cached function
- - (...ts): V
  - Parameters
    - Rest ...ts: Ts
    Returns V
Example
```
sort(ts, cache(t => "heavy compute..."))
```
- Defined in cache/utils.ts:23

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