Re: [racket-users] backwards-incompatible change to in-vector

> I think you should not change this backwards compatibility unless you > really know it isn't used (and even then it is hard to know such > things). Well I still think these programs would be relying on a bug, since they are referencing a non-existent vector element. But since there's no

Re: [racket-users] Top Level Variables or List of Shared Libraries

> On Jan 19, 2016, at 11:14 AM, Leif Andersen wrote: > > Is it possible to either create a variable that persists until the > Racket VM shuts down or get a list of all of the libraries that are > shared libraries that are currently being linked against the racket > vm? I

Re: [racket-users] backwards-incompatible change to in-vector

On Tuesday, January 19, 2016, Stephen Chang wrote: > > I think you should not change this backwards compatibility unless you > > really know it isn't used (and even then it is hard to know such > > things). > > Well I still think these programs would be relying on a bug,

[racket-users] backwards-incompatible change to in-vector

I'm fixing pr 15227 but I would like to do so in a backwards-incompatible way. Right now an out-of-range index is sometimes allowed as an argument to in-vector, leading to the bug: $ racket Welcome to Racket v6.4.0.4. -> (for/sum ([x (in-vector (vector 10 20) 2 -1 -1)]) x) SIGSEGV MAPERR si_code

[racket-users] Top Level Variables or List of Shared Libraries

Is it possible to either create a variable that persists until the Racket VM shuts down or get a list of all of the libraries that are shared libraries that are currently being linked against the racket vm? The reason why I ask is because I created a `from-c` require form[1], which takes in a C

Re: [racket-users] backwards-incompatible change to in-vector

Would it be possible to special-case `(in-vector (vector) 0 0)` directly, and fix the bug while keeping backwards compatibility? Vincent On Tue, 19 Jan 2016 12:19:12 -0600, Stephen Chang wrote: > > I'm fixing pr 15227 but I would like to do so in a backwards-incompatible way. > > Right now an

Re: [racket-users] backwards-incompatible change to in-vector

I think you should not change this backwards compatibility unless you really know it isn't used (and even then it is hard to know such things). Robby On Tue, Jan 19, 2016 at 1:16 PM, Stephen Chang wrote: > Yes, or course it's possible, at the expense of more unreadable

Re: [racket-users] backwards-incompatible change to in-vector

Yes, or course it's possible, at the expense of more unreadable code. But the zero special case doesnt make sense. And is inconsistent with other out-of-range cases, eg (in-vector (vector) 1 1) errors To be clear, empty traversals with valid indices would still be legal, eg (in-vector (vector 1

[racket-users] 1st Call for Contributions for SPLASH'16: OOPSLA, Onward!, Workshops, DLS, SLE, GPCE

// ACM Conference on Systems, Programming, Languages, and Applications: Software for Humanity (SPLASH'16) Amsterdam, The Netherlands Sun 30th October - Fri 4th November , 2016 http://2016.splashcon.org Sponsored

[racket-users] Using the web server without continuations?

I’ve been using the Racket web server, and I’m very pleased with how easy it’s been to get a simple working application. However, so far, I haven’t been using send/suspend or any of the other features that leverage continuations. I’ve been wondering: since I’m not using send/back (just returning

Re: [racket-users] backwards-incompatible change to in-vector

I couldn't write an example that is not obvious, but this programs looks ok to me: ;--- #lang racket (define (display-vector v) (for ([x (in-vector v 0 (vector-length v))]) (display x))) (display-vector (vector 1 2 3)) (newline) (display-vector (vector)) (newline) ;--- And I also like

Re: [racket-users] Using the web server without continuations?

If you do not use send/suspend or send/suspend/dispatch, no continuations are ever saved. You do not need to "opt out". You "opt in" to continuations. Jay On Tue, Jan 19, 2016 at 7:07 PM, Alexis King wrote: > I’ve been using the Racket web server, and I’m very pleased

[racket-users] Re: Code critique request: data/fetch, proc for walking hashes/lists

I apologize for the long ping time on this -- for whatever reason I didn't get any of the replies sent to my email and I thought no one had responded. JCG, Jack, thank you very much for taking the time. Jack: I had to stare at your code for a while before I got it, but thank you for it.

Re: [racket-users] Store value with unsupported type in Postgres?

On 01/17/2016 06:35 PM, Alexis King wrote: The DB docs for SQL type conversions[1] note that not all Postgres types are supported by Racket, and it recommends using a cast to work around this. It even uses the inet type as an example right at the start of the page. However, I want to store an

Re: [racket-users] Using the web server without continuations?

Perfect! That was my hope. One more question: if I did want to opt-in to continuations for just a single portion of my application, could I? The way I’ve been structuring my application is to have a module that serves as an entry point that calls serve/servlet and passes a dispatch function