Re: PiL3: typos

[Robert Virding <robert.virding@...>]

Doesn't memoization become very difficult, if at all possible, if you don't have pure functions? Memoization works because you can assume that if a function is called with the same arguments then it will give the same results every time so we can remember the args -> result mapping. When you have side-effects and mutable data it becomes very difficult. Which I think makes it not very usable for Lua.

Robert

----- Original Message -----
> From: "Paul Merrell" <marbux@gmail.com>
> To: "Lua mailing list" <lua-l@lists.lua.org>
> Sent: Tuesday, 29 October, 2013 11:03:36 PM
> Subject: Re: PiL3: typos
> 
> Wikipedia has a fairly lengthy article on memoization.
> <https://en.wikipedia.org/wiki/Memoize>.
> 
> Best regards,
> 
> Paul
> 
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