Re: [Chicken-users] irregex-replace return value
On Tue, Mar 4, 2014 at 1:05 AM, Michele La Monaca mikele.chic...@lamonaca.net wrote: (define (my-own-irregex-replace irx s . o) (let ((m (irregex-search irx s))) (and m (string-append (substring s 0 (irregex-match-start-index m 0)) (apply string-append (reverse (irregex-apply-match m o))) (substring s (irregex-match-end-index m 0) (string-length s)) After some pondering I realized that it would be valuable to provide this primitive in the library: (define (irregex-replace-match m str o) (string-append (substring str 0 (irregex-match-start-index m 0)) (apply string-append (reverse (irregex-apply-match m o))) (substring str (irregex-match-end-index m 0) (string-length str After some more mulling, I concluded that it would be even more convenient to have a generalised version of irregex-replace-match which also accepts lists of matches: (irregex-replace-match match-or-list-of-matches str o) On top of that, it would be easy to build irregex-replace/all semantics, too: (define (irregex-replace/all irx str . o) (let ((ms (irregex-search/all irx str))) (if (pair? ms) (irregex-replace-match ms str o) str))) (define (my-irregex-replace irx str . o) (let ((ms (irregex-search/all irx str))) (and (pair? ms) (irregex-replace-match ms str o It would also be possible to easily implement less common actions like that: (define (irregex-replace/2nd-and-4th irx str . o) (let ((ms (irregex-search/all irx str 4))) (if (pair? ms) (irregex-replace-match (list (list-ref ms 1) (list-ref ms 3)) str o) str))) Michele ___ Chicken-users mailing list Chicken-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/chicken-users
[Chicken-users] Why is it called Chicken?
Perhaps a silly question, but I'm curious. Why is Chicken Scheme called Chicken? Cheers, Daniel. -- When an engineer says that something can't be done, it's a code phrase that means it's not fun to do. ___ Chicken-users mailing list Chicken-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/chicken-users
Re: [Chicken-users] Why is it called Chicken?
Hi Daniel, There's an interview with Felixhttp://spin.atomicobject.com/2013/05/02/chicken-scheme-part-1/that might answer your question: *One last question: What inspired the names CHICKEN and SPOCK? Do they mean anything, aside from the bird and the well-known Star Trek character?* That question always comes up, sooner or later. ;-) I had a plastic toy of Feathers McGraw on my desk, the evil penguin (disguised as a chicken!) from the Wallace and Gromit movie, “The Wrong Trousers.” Looking for a preliminary working title for the compiler, I used the first thing that came to my mind that day. I’m somewhat superstitious about names for software projects, and things were progressing well, so I didn’t dare to change the name. K. On Tue, Mar 4, 2014 at 3:22 PM, Daniel Carrera dcarr...@gmail.com wrote: Perhaps a silly question, but I'm curious. Why is Chicken Scheme called Chicken? Cheers, Daniel. -- When an engineer says that something can't be done, it's a code phrase that means it's not fun to do. ___ Chicken-users mailing list Chicken-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/chicken-users ___ Chicken-users mailing list Chicken-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/chicken-users
Re: [Chicken-users] Why is it called Chicken?
Heh. That's great. And thanks for the link. Cheers, Daniel. On 4 March 2014 15:42, Kristian Lein-Mathisen kristianl...@gmail.comwrote: Hi Daniel, There's an interview with Felixhttp://spin.atomicobject.com/2013/05/02/chicken-scheme-part-1/that might answer your question: *One last question: What inspired the names CHICKEN and SPOCK? Do they mean anything, aside from the bird and the well-known Star Trek character?* That question always comes up, sooner or later. ;-) I had a plastic toy of Feathers McGraw on my desk, the evil penguin (disguised as a chicken!) from the Wallace and Gromit movie, “The Wrong Trousers.” Looking for a preliminary working title for the compiler, I used the first thing that came to my mind that day. I’m somewhat superstitious about names for software projects, and things were progressing well, so I didn’t dare to change the name. K. On Tue, Mar 4, 2014 at 3:22 PM, Daniel Carrera dcarr...@gmail.com wrote: Perhaps a silly question, but I'm curious. Why is Chicken Scheme called Chicken? Cheers, Daniel. -- When an engineer says that something can't be done, it's a code phrase that means it's not fun to do. ___ Chicken-users mailing list Chicken-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/chicken-users -- When an engineer says that something can't be done, it's a code phrase that means it's not fun to do. ___ Chicken-users mailing list Chicken-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/chicken-users
Re: [Chicken-users] Matchable not working in module
PS: I am aware of the uri-match egg, and considered using it, but I felt the tree syntax was unnecessarily complex for this application. If I can't get matchable working I might reconsider that choice. On Tue, Mar 4, 2014 at 8:39 PM, Matt Gushee m...@gushee.net wrote: Hi, all-- I'm working on a new version of my coq-au-vin egg; one of the major changes is that I am moving the FastCGI request handling code into a module within the egg--it was previously separate. However, I'm now getting a compile error like this: : Warning: reference to possibly unbound identifier `ofs' in: : Warning:failure527 : Error: module unresolved: cav-web-fcgi I am using 'match' from the matchable egg to dispatch requests, like this: : (match spec : [(or ((/ ) GET #f) ((/ articles) GET #f)) : (send-html (get-article-list-page/html out: #f))] : [(or ((/ ) GET #f) ((/ articles) GET ofs)) : (send-html (get-article-list-page/html out: #f offset: (string-number ofs)))] ... and so on. So 'ofs' is a variable in the pattern match. This code has been working for some time, but it was not in a module before; it still compiles if I comment out the module-specific code, i.e.: : ; (module cav-web-fcgi ; * ; (import scheme chicken) but I cannot get it to compile as a module. I imagine it has something to do with 'match' being a macro, but I don't know what to do about it. Any ideas? -- Matt Gushee ___ Chicken-users mailing list Chicken-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/chicken-users
Re: [Chicken-users] Matchable not working in module
On 05/03/14 16:39, Matt Gushee wrote: However, I'm now getting a compile error like this: : Warning: reference to possibly unbound identifier `ofs' in: : Warning:failure527 : Error: module unresolved: cav-web-fcgi I am using 'match' from the matchable egg to dispatch requests, like this: : (match spec : [(or ((/ ) GET #f) ((/ articles) GET #f)) : (send-html (get-article-list-page/html out: #f))] : [(or ((/ ) GET #f) ((/ articles) GET ofs)) : (send-html (get-article-list-page/html out: #f offset: (string-number ofs)))] ... and so on. So 'ofs' is a variable in the pattern match. `ofs` is only present in the second arm of the `(or ...)` pattern, so I'm guessing this is due `ofs` being unbound in the expansion of the first alternative. It's as if you had said: (match a ((or #f x) x)) ... Which will hopefully signal a similar error (hopefully -- untested!). This probably only worked before due to the forgiving nature of the top level (which is hopeless, and so on). Anyway, try refactoring the `match` clause to bind `ofs` in all cases and see if that helps. Cheers, Evan ___ Chicken-users mailing list Chicken-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/chicken-users
Re: [Chicken-users] Matchable not working in module
Hi, Evan-- On Tue, Mar 4, 2014 at 10:36 PM, Evan Hanson ev...@foldling.org wrote: : [(or ((/ ) GET #f) ((/ articles) GET ofs)) : (send-html (get-article-list-page/html out: #f offset: (string-number ofs)))] `ofs` is only present in the second arm of the `(or ...)` pattern, so I'm guessing this is due `ofs` being unbound in the expansion of the first alternative. It's as if you had said: Whoops! You're right. I'm surprised I didn't catch that before. Looks like that #f in the first branch should have been 'ofs' all along. untested!). This probably only worked before due to the forgiving nature of the top level (which is hopeless, and so on). If by top level you mean the REPL, that's not the issue. That code compiled (many times) and has been running on my web server for 4 months. Only when I wrapped it in a module did it fail to compile. Isn't that a little disturbing? If I had some sort of rigorous test script, I probably would have caught that error; I really don't know how to do that for a FastCGI app. Since it won't really work without the (separate) web server, normal unit testing isn't very applicable. Anyway, many thanks for spotting that. Now I will be able to sleep tonight ;-) -- Matt Gushee ___ Chicken-users mailing list Chicken-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/chicken-users
