[smithbits]

"Surely you're not learning much by repeating JMC's flawed Ur-Lisp from 1959." No. Implementing an ur-lisp teaches you all kinds of things if you've never implemented a programming language before. It's a solid bite-sized project that's harming no one. Think I'll go write another one, maybe in Haskell this time.

[silentbicycle]

Implementing Forth will also teach you a lot of (different) things, and can be done relatively quickly.

[Semiapies]

So do both.

[larrik]

I agree. Simply writing my own scripting language once taught me a lot more than I would have expected. Now I use Lua, though.

[stcredzero]

How about Javascript?