Re: [racket-users] Why doesn't this maxval function correctly return the maximum value in the list

Here's a version of your code that runs in the Intermediate Student language ("local" isn't part of Beginning Student): (define (maxval lst) (local ((define (aux lst max) (cond [(null? lst) max] [(> (car lst) max) (aux (cdr lst) (car lst))]

Re: [racket-users] Why doesn't this maxval function correctly return the maximum value in the list

You may wish to read up on the design recipe and the necessity of ‘local’ definitions in HtDP2e: http://www.ccs.neu.edu/home/matthias/HtDP2e/ > On Feb 13, 2017, at 3:46 PM, Angus Comber wrote: > > But it has to have the signature maxval lst - it is a homework

Re: [racket-users] Why doesn't this maxval function correctly return the maximum value in the list

But it has to have the signature maxval lst - it is a homework problem. So I thought I would need max in the helper function. Basically to keep an internal max saved value. Is there another way? On 13 February 2017 at 20:38, Matthias Felleisen wrote: > > Just lift aux

Re: [racket-users] Why doesn't this maxval function correctly return the maximum value in the list

Just lift aux out. > On Feb 13, 2017, at 3:18 PM, Angus Comber wrote: > > If I change the code to: > > (define (maxval lst) >(define (aux lst max) > (cond [(null? lst) max] >[(> (car lst) max) (aux (cdr lst) (car lst))] >[#t (aux

Re: [racket-users] Why doesn't this maxval function correctly return the maximum value in the list

If I change the code to: (define (maxval lst) (define (aux lst max) (cond [(null? lst) max] [(> (car lst) max) (aux (cdr lst) (car lst))] [#t (aux (cdr lst) max)])) (aux lst 0)) and comment out #lang racket at the top of the file and select Beginning Student as

Re: [racket-users] [Library Announcement] CSS-expressions, Pollen Component and Extensible Functions

I will definitely check out the CSS package this weekend! On 13 Feb 2017 13:48, "Leandro Facchinetti" wrote: > Hi all, > > I’m here to announce three packages I published recently, because I want > feedback from the community: > > - CSS-expressions: S-expression-based CSS. >

[racket-users] [Library Announcement] CSS-expressions, Pollen Component and Extensible Functions

Hi all, I’m here to announce three packages I published recently, because I want feedback from the community: - CSS-expressions: S-expression-based CSS. https://docs.racket-lang.org/css-expr/index.html - Pollen Component: Component-based development for Pollen.