Hi,

In a practice, I encountered a problem of memorizing functions. Given a

function `f`

, a memorized version of `f`

, called `memo f`

should cache the

results of `f`

applying on some `input`

. I tried a demo here

https://glot.io/snippets/egflakau5h, which shows a generic implementation

of the function `memo0`

(for memorizing a function of no arguments) and

`memo1`

(for memorizing a function with one argument). Comments are

welcomed.