It's 2023, so of course I'm learning Common Lisp

Post by lispm » Thu, Jul 27, 2023, 6:13 AM UTC

mathisfun123 wrote: post #104

behnamoh wrote: post #102

Earlier quoted context omitted.

> “mathematica is a lisp”

http://xahlee.info/M/lisp_root_of_wolfram_lang.html http://xahlee.info/M/lisp_vs_WolframLang.html > WolframLang has all the characteristics of LISP: seems you either don't know what lisp is or you've never written mathematica

Post by CodeCompost » Thu, Jul 27, 2023, 6:17 AM UTC

schemescape wrote: post #21

Wow, wasn't expecting to see my post on here! Eventually, I want to write a follow-up, but I'm still a beginner. Here's what I've liked about Common Lisp so far: * The condition system is neat and I've never used anything like it -- you can easily control code from afar with restarts * REPL-driven programming is handy in situations where you don't quite know what will happen and don't want to lose context -- for exam…

Post by dleslie » Thu, Jul 27, 2023, 6:29 AM UTC

em-bee wrote: post #47

dleslie wrote: post #41

Earlier quoted context omitted.

Lots of languages that are not lisp have this ability.

examples please, because so far i have only seen this from common lisp and smalltalk. there is also pike where i can reload classes or objects at runtime, thus avoiding a full restart, but it's not as closely integrated as in smalltalk and you actually have to build your app in a way that allows you to do that.

Post by actuallyalys » Thu, Jul 27, 2023, 6:32 AM UTC

memefrog wrote: post #72

mathisfun123 wrote: post #70

Earlier quoted context omitted.

> The repl driven workflow is amazing and the lisp images are rock solid and highly performant. do people not realize that basically everything vm/interpreted language has a repl these days? https://www.digitalocean.com/community/tutorials/java-repl-j... https://github.com/waf/CSharpRepl https://pub.dev/packages/interactive not to mention ruby, python, php, lua hell even c++ has a janky repl https://github.com/root-p…

Of course people "realise" this. But those REPLs are not actually REPLs. They are interactive language prompts. They aren't actually REPLs. As the joke goes, Python doesn't have a REPL: it lacks READ, EVAL, PRINT and LOOP. Being able to type in code and have it evaluated one line at a time isn't a REPL.

Post by remexre » Thu, Jul 27, 2023, 6:35 AM UTC

opportune wrote: post #114

vippy wrote: post #99

Earlier quoted context omitted.

It took me a while to grok monads, and the IO monad, and longer still to figure out how to compose them in safe ways, and manipulate execution order, etc. But: now I can write typesafe applications, and I produce fewer bugs when I work in non-FP languages (I get paid to write Java.) Lisp is a starting point. Haskell is where it's at. I recommend learning the style, even if you never produce production code in it.

Let’s say I want to do something simple but slightly beyond the scope of a traditional toy demonstration: * Read some environment variables and a local file * Start a monitoring thread that consumes from a channel or something similar, then every X s or X events writes to a local temp file and then sends a request batching some metrics to an external system * Configure and start an http server * Said server has a han…

    import System.Environment (getEnv)
    import System.FilePath (())
    main = do
      dir  "foo.txt")
      putStrLn ("Had " ++ show (length (lines data)) ++ " lines")

    import Control.Concurrent
    import Control.Concurrent.Chan
    import Network.HTTP
    -- also more stuff...

    monitoringThread :: Chan String -> IO ()
    monitoringThread chan = do
      file 

    import Network.Wai
    import Network.Wai.Handler.Warp

    main = run 8000 $ \req respond ->
      respond (responseLBS status200 [] "Hello, world!")