Re: [racket-users] list->set behavior on lists of symbols

Thank you David and Alexis for the helpful answers. Deyaa On Thu, Dec 29, 2016 at 2:17 AM, Alexis King wrote: > David’s explanation is good. Let me add a little bit more context. It is > a common mistake to think that ' can be used as a shorthand form of the > `list`

Re: [racket-users] list->set behavior on lists of symbols

David’s explanation is good. Let me add a little bit more context. It is a common mistake to think that ' can be used as a shorthand form of the `list` function, but this is not the case. The quote form is a primitive, and it has very specific (if fairly simple) behavior with respect to

Re: [racket-users] list->set behavior on lists of symbols

Hi Deyaa, > I wonder why (list->set '('1)) evaluates to (set ''1) instead of (set '1). > I use Racket v6.7. The expression '('1) is a shorter way of writing (quote ((quote 1))) The value of (quote x) is x, so the value of that is the list containing (quote 1), or ((quote 1)). In

[racket-users] list->set behavior on lists of symbols

Hi, I wonder why (list->set '('1)) evaluates to (set ''1) instead of (set '1). I use Racket v6.7. Thanks! Deyaa -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email

Re: [racket-users] Add fns or at least sample code for getting column names from table?

There's also this: (query-rows db " SELECT column_name FROM information_schema.columns WHERE table_schema = 'your_schema' AND table_name = 'your_table' ") On Wed, Dec 28, 2016 at 12:46 PM, Philip McGrath

Re: [racket-users] Narrow radix of string->number.

I started with Ryan's code from `~r` and tried to emulate some special cases I see the C code (and didn't worry about negative numbers) and ended up with something 4-5x slower than the C code version. :( Code follows. Robby #lang racket (define (number->string* N) (cond [(zero? N)

Re: [racket-users] mode-lambda and the gl-backend

Thanks for the recommendation! /Jens Axel 2016-12-28 19:21 GMT+01:00 David Vanderson : > On Wed, Dec 28, 2016 at 11:40 AM, Jens Axel Søgaard > wrote: > >> Below is what works for me (this is just for the archives). >> When run the program

Re: [racket-users] mode-lambda and the gl-backend

On Wed, Dec 28, 2016 at 11:40 AM, Jens Axel Søgaard wrote: > Below is what works for me (this is just for the archives). > When run the program prints this warning/info which I assume it is ok to > ignore. > > GL context changed > You are using OpenGL '(4 1) with

Re: [racket-users] Add fns or at least sample code for getting column names from table?

Something like this would be really good. I also, relatively recently, discovered the "name" fields when I happened to look at a rows-result directly, and being able to work with columns by name rather than by position is much better. I guess I should have realized there was some way of doing

Re: [racket-users] mode-lambda and the gl-backend

Below is what works for me (this is just for the archives). When run the program prints this warning/info which I assume it is ok to ignore. GL context changed You are using OpenGL '(4 1) with gl-backend-version of 3.3 '#(#(400.0 400.0) #(0.945 0.945) #(378.0 378.0) #(378.0 378.0)

Re: [racket-users] Mobile Friendly HTML in Scribble?

> On Dec 28, 2016, at 6:06 AM, Michael Rossi wrote: > > couldn't you simply add all three code layout options and then add a > commandline switch in scribble when generating html? I.e. by default, do > nothing with the code. Otherwise, add switches to either wrap

[racket-users] Add fns or at least sample code for getting column names from table?

For the last few years, I’ve believed that there was no way to get the column names of tables using the db interface. Today I discovered that—using both postgresql and sqlite3, at least—I can extract these from the “name” fields of the “headers” field of the row-response to a “SELECT * FROM

Re: [racket-users] Re: Mobile Friendly HTML in Scribble?

On Tue, Dec 27, 2016 at 10:55:45PM -0500, George Neuner wrote: > On Tue, 27 Dec 2016 22:23:49 +, Philip McGrath > wrote: > > >Has something changed recently in the CSS for the Racket documentation? I > >thought that formerly the phone layout was equivalent to what

Re: [racket-users] Narrow radix of string->number.

On Wed, Dec 28, 2016 at 12:08 AM, Matthew Butterick wrote: > FWIW Racket's own `~r` function already accepts radixes (radices? radishes?) > up to 36. Ah, good point! I think it makes a lot of sense to do exactly what it does (or, if people find useful things, something more

[racket-users] Fix Ctr+F search on the new website?

Hey all, I noticed that Ctr+F based searching is kind of uncomfortable on the new website. Namely, if I am searching for a word that is located below one of the images, it gets highlighted like you would expect, but the image doesn't actually disappear. Thus I need to play whack-a-mole to find

Re: [racket-users] Mobile Friendly HTML in Scribble?

On Wednesday, December 28, 2016 at 12:00:24 AM UTC-6, Matthew Butterick wrote: > Google's policy is coercive and awful. But even if it weren't, the practical > problem is that code samples don't shrink well because they can't be > line-wrapped. [1] > > > [1]