[racket-users] Trying to build 'routing' macro for dispatch-rules

I'm trying to build a macro that will generate routing rules for 'dispatch-rules'. (dispatch-rules) from web-server/dispatch has this form: (dispatch-rules (("announce-user") #:method post process-announce-user)) ...more routes here... ) This seems like it should be automatable, so I

[racket-users] Re: Compare parts of string or compare with wildcard.

Excellent thank you. To note I am searching the docs but I see I did not scroll far enough. I went to go find string-prefix in the doc and also found string-contains and string-suffix in the same set of examples. So you gave me an inadvertent trifecta of useful information. It also means

[racket-users] Re: Building regexen in at-exp

In a future version of what I am working on I see regex being an excellent solution. My search is against a file I load into a list at program initialization. However for other parts of this to load a list based on a partial file filtered with regex may be a better solution. There is also

Re: [racket-users] Building regexen in at-exp

To understand what's going on, consider the following program: #lang at-exp racket (define a "this") (define (f . l) (for-each displayln l)) @f{^@a} which prints ^ this What's going on is that the `{}` in at-exp notation will evaluate to a list of strings. One

Re: [racket-users] Re: Building regexen in at-exp

On Fri, Oct 28, 2016 at 3:24 PM, Ken MacKenzie wrote: > In a future version of what I am working on I see regex being an excellent > solution. My search is against a file I load into a list at program > initialization. However for other parts of this to load a list based

[racket-users] Convention for package build scripts (that don't really have to be part of the package)?

When I made recent changes to my tzdata package, I included a module that automates the process of re-building the package. (It downloads the latest version of the tz data and its associated code, builds the zoneinfo database from it, and constructs an info.rkt file for it.) I have a similar kind

[racket-users] Building regexen in at-exp

tl;dr : Why is the following an error? #lang at-exp racket (define a "this") @pregexp{^@a} ;; Should produce #px"^this" but errors out @pregexp{@(~a "^" a)} ;; This works but is clumsy Long version: The at-exp language (http://www.greghendershott.com/2015/08/at-expressions.html and

Re: [racket-users] Racket builds for ARM?

Matthew Flatt [16-10-28 05:04]: > If ARMBIAN and Raspbian are compatible, then you could try the Utah > snapshot site's Raspbian build: > > http://www.cs.utah.edu/plt/snapshots/ > > At Fri, 28 Oct 2016 03:21:49 +0200, meino.cra...@gmx.de wrote: > > Hi, > > > > after

Re: [racket-users] git-checkout-credentials

The `raco pkg config` options are documented here: http://docs.racket-lang.org/pkg/cmdline.html#%28part._raco-pkg-config%29 (It might be a good idea to add the names of the individual options to the index so they can be searchable.) Specifically, the format is a series of username:password

Re: [racket-users] Request for comments: An embedded DSL for CSS in Racket

> I just meant: it's an approach that has worked before. "Better"? That's for > you to decide. Alright :) Regarding the syntax of the DSL, I was intentionally vague about it in the original post because I wanted to focus on the technical choices I made. But let me expand on it a bit the means of

[racket-users] Compare parts of string or compare with wildcard.

I have two things I am trying to compare, both strings. What I want to know is if string a is the beginning of string b. Example (pseudo code) string a = this string b = that string c = thisandthat a... == c #t b... == c #f Hope I am making sense here. I couldn't figure out a way so at

Re: [racket-users] Re: Building regexen in at-exp

Sort of. at a high level pseudo code view I have a file of things the user inputs a list of things for each thing the user inputs it finds all reference in the file of things To put it plainly if you are familiar with Princeton's word net db/files I am searching the words in a user inputted

Re: [racket-users] Re: Building regexen in at-exp

*@pregexp{^@a}* is read as *(pregexp "^" a)* [you can test this by evaluating the quoted form, '*@pregexp{^@a}* ], but the function pregexp expects a single string as its first argument (and, apparently, a function or #f as its optional second argument). More generally, the body part of an

Re: [racket-users] Racket builds for ARM?

Hi Meino, I run Racket on my Raspberry Pi (version 2 and 3)[*]. I download unix source + built packages and build the "core" following the instructions in src/README: https://github.com/racket/racket/blob/master/racket/src/README Basically it's just: mkdir build cd build ../configure make make

[racket-users] Re: Compare parts of string or compare with wildcard.

Hi Ken, string-prefix? does exactly what you want. > (define a "this") (define b "that") (define c "thisandthat") > (string-prefix? c a) #t > (string-prefix? c b) #f https://docs.racket-lang.org/reference/strings.html#%28def._%28%28lib._racket%2Fstring..rkt%29._string-prefix~3f%29%29 Best,

[racket-users] Putting Racket into the database or, more sanely, storing continuations

Is it possible to take (e.g.) a procedure object and decompose it back into its original source code? Background: I need a very simple pure-Racket task manager for the app I'm working on. This is an application-internal TM, not a for-users TM -- the sort of tasks it will be handling are "in 5

Re: [racket-users] Request for comments: An embedded DSL for CSS in Racket

>> 1) Perhaps have a look at the approach used by the `xml` and `html` and >> `json` >> libraries, which is 1) parse data from string, 2) store data in nested >> structs, 3) generate new string from nested-struct thingy. > > I understand this approach, but I do not understand how it is better

[racket-users] Re: Request for comments: An embedded DSL for CSS in Racket

Hi, all. Greg Trzeciak: I did not know about Garden, thank you for the reference. In particular, I liked the way he talks about decoupling selectors and declarations. It is something I have been doing in my CSS for a long time: previously with SASS mixins, now with my library and calls to Racket