libera/#commonlisp - IRC Chatlog

10:56:31 Lord_of_Life_ ** NICK Lord_of_Life

11:17:28 mfiano What is a good way to transform a string repeatedly given a list of cons of translation characters. For example given the list ((#\, . #\-) (#\; . #\:)) and the string "foo,bar;baz", it should produce "foo-bar:baz"

11:19:05 semz mfiano: Is reduce + substitute too expensive due to intermediates?

11:19:56 mfiano Hmm, probably not.

11:20:58 semz Although this may run into issues if one character is replaced with another character that is to be replaced later

11:21:41 lisp123 i'd probably separate the list to (, ;) and (- :) if the string is large enough

11:21:43 mfiano Yeah that's no good.

11:23:29 mfiano So it seems I have to do single-pass

11:24:25 mfiano with #'(setf char) or whatnot

11:33:14 lisp123 this week going to have about 5000 people using my CL app (for a few minutes each at a conf)

11:33:38 jackdaniel good luck

11:34:07 lisp123 jackdaniel: thanks

11:35:30 mfiano Something like this maybe is sufficient: https://gist.github.com/mfiano/5616e646ad101334ff4c4938872caaa7

11:37:50 rotateq Or if you would use REPLACE?

11:38:09 mfiano I don't see how REPLACE would work here.

11:38:15 jackdaniel substitute if anything, and that would require n passes

11:38:36 rotateq ok.

11:38:47 rotateq ah right, substitute

11:38:50 mfiano jackdaniel: n passes would be problematic as mentioned above

11:39:14 mfiano I do not want subsequent passes to mutate previous passes. I want to do it all in one pass to avoid that

11:39:16 jackdaniel that's why I'm not suggesting it, I've mentioned it to correct rotateq

11:39:20 mfiano AH

11:39:42 rotateq jackdaniel: very good of you, thx :)

11:40:02 jackdaniel sure, I've mixed these two functions too

11:40:32 jackdaniel what is a testimony that replace is perhaps not the best name for that particular function

11:40:44 mfiano There's also substr and sublis for trees

11:40:50 mfiano I mix those two up all the time

11:41:09 lisp123 := whats this

11:41:11 mfiano err subst

11:41:17 mfiano it's a keyword symbol

11:41:19 lisp123 madness

11:41:29 lisp123 infix in CL

11:41:39 lisp123 loop macro has a = clause/phrase?

11:41:42 rotateq I always see what I didn't use yet so often. Or today, that NTH-VALUE is actually a macro.

11:41:59 rotateq lisp123: why infix?

11:42:11 lisp123 :for (old . new) := (assoc char transforms)

11:42:13 jackdaniel there are two camps loop-wise - people who use keywords and people who don't

11:42:24 rotateq Yes it has.

11:44:37 mfiano Maybe I should be looping over STRING instead of NEW-STRING. I have to read to iteration restrictions in the CLHS again

11:44:48 mfiano I think it is legal to mutate the current iteration though

11:45:42 lisp123 should be

11:46:01 lisp123 how does lisp calculate array length btw?

11:46:12 mfiano It's in the tag

11:46:16 lisp123 Thanks

11:46:23 mfiano Well that's implementation dependent

11:48:20 mfiano and not all arrays have a length, anyway

11:48:36 rotateq lisp123: I think you mean vector length or array dimensions. ;)

11:48:42 mfiano ^

11:48:57 mfiano Only a vector is a sequence

11:50:04 jackdaniel (map 'string (lambda (ch) (or (cdr (assoc ch *vroom*)) ch)) *string*)

11:51:10 mfiano That looks decent too

11:52:25 mfiano Much more concise and more readable. I think I'll go with that.

11:52:30 mfiano Thanks

11:52:42 jackdaniel sure

11:53:34 jackdaniel there is always map-into

11:53:43 jackdaniel if you are not interested in retaining the old string

11:53:49 mfiano I am :)

11:59:21 lisp123 how to reload a file in sbcl repl

11:59:41 jackdaniel (load <file>) would be one way

11:59:55 lisp123 thanks!

12:00:08 jackdaniel sure

12:00:10 lisp123 So CLISP has a better repl than SBCL?

12:00:29 jackdaniel try linedit for similar capabilities

12:01:00 jackdaniel clisp payed a dear price for rlwrap integration - it had to change its own license

12:01:52 lisp123 oh it was rlwrap that caused CLISP to be GPL?

12:02:18 jackdaniel yes, I think that an email conversation is linked from clisp website

12:02:27 jackdaniel they've reached a mutal understanding after some back and fro

12:02:58 lisp123 yeah I read that but not the details

12:03:01 jackdaniel (Bruno Haible and Richard Stallman - afair)

12:03:14 lisp123 i was reading recently on how ECL's roots are quite good

12:03:26 lisp123 first CL implementation built ground up from the specificaiton

12:03:47 jackdaniel technically it was KCL ,)

12:03:57 lisp123 yah

12:04:23 jackdaniel and KCL has more descendants than ECL

12:05:44 Mrtn[m] jackdaniel: Cool. I like the GPL.

12:06:21 mfiano and CLASP is derived from ECL afaik :)

12:07:20 jackdaniel only core runtime, not the compiler

12:07:42 jackdaniel (and parts of the core runtime written in C were rewritten in C++)

12:11:51 lisp123 one day I will learn C

12:17:40 Mrtn[m] <lisp123> "one day I will learn C" <- What will you do in the afternoon of that day?

12:19:23 Mrtn[m] Hey Bike, good afternoon.

12:20:54 lisp123 Mrtn[m]: Learn RUST #FAST #SAFE

12:39:49 Bike gday

12:43:01 jackdaniel o/

12:43:24 trev i had just watched a talk by the creator of clasp

12:43:56 trev amazing how much work he has done, plus the chemistry stuff

12:45:03 jackdaniel drmeister: your are being praised ^

12:45:58 rotateq trev: It's really one of the most impressive talks I know, due to the idea of translating the metaprogramming for chemistry.