Re: [racket-users] Scribble: unnumbered and unindexed sections

2016-09-04 Thread Matthew Flatt 
Besides `#:style 'unnumbered` as William says, to avoid the duplicate
key warnings, you more or less have to cons up a new name --- but it
doesn't have to be a visibly distinct section name.

You can either

 * use `#:tag "HandinX"` with a different "X" for each "Handin
   Instructions" section, or

 * use `#:tag-prefix "X"` with a different "X" for each of the N
   sections.

If you go the latter route, you'll also need to use `#:tag-prefix` in a
cross-reference to a subsection (if you have any besides "Handin
Instructions") in one of the N sections.

At Sun, 4 Sep 2016 11:50:21 -0700 (PDT), Shriram Krishnamurthi wrote:
> Is there a way to have unnumbered and unindexed section? (Yes, these are 
> different issues.)
> 
> It would be helpful to have unnumbered sections, à la \[sub]section* in LaTeX.
> 
> It would be especially helpful to have unindexed sections. The real nuisance 
> I'm trying to avoid is, say I have N sections that each have a subsection 
> named "Handin Instructions". Then I get a bunch of Scribble warnings due to 
> the duplicate section name. Since I have no desire to link to these sections, 
> I don't need them indexed at all. And this way I don't have to cons up new 
> names for each of them (though I do of course have that option…).
> 
> Thanks.
> 
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RE: [racket-users] Scribble: unnumbered and unindexed sections

2016-09-04 Thread Jos Koot 
Would this do what you want?

#lang scribble/base

@section{a}
@subsubsub*section{a}
@subsubsub*section{a}
@subsubsub*section{a}

@section{b}
@seclink["a" "section a"]
@subsubsub*section{b}
@subsubsub*section{b}
@subsubsub*section{b}

@section{b}
@subsubsub*section{b}
@subsubsub*section{b}
@subsubsub*section{b}

Jos



-Original Message-
From: racket-users@googlegroups.com [mailto:racket-users@googlegroups.com] On 
Behalf Of Shriram Krishnamurthi
Sent: domingo, 04 de septiembre de 2016 20:50
To: Racket Users
Subject: [racket-users] Scribble: unnumbered and unindexed sections

Is there a way to have unnumbered and unindexed section? (Yes, these are 
different issues.)

It would be helpful to have unnumbered sections, à la \[sub]section* in LaTeX.

It would be especially helpful to have unindexed sections. The real nuisance 
I'm trying to avoid is, say I have N sections that each
have a subsection named "Handin Instructions". Then I get a bunch of Scribble 
warnings due to the duplicate section name. Since I
have no desire to link to these sections, I don't need them indexed at all. And 
this way I don't have to cons up new names for each
of them (though I do of course have that option…).

Thanks.

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Re: [racket-users] Re: lambda and the equivalent define / "defun"

2016-09-04 Thread Sanjeev Sharma 
if anyone stumbles on this later this is also discussed in Kent Dybvig's TSPL4

http://www.scheme.com/tspl4/start.html#./start:h6

from section 2.6:

For example, the definitions of cadr and list might be written as follows.

(define (cadr x)
  (car (cdr x))) 

(define (list . x) x)

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Re: [racket-users] Scribble: unnumbered and unindexed sections

2016-09-04 Thread 'William J. Bowman' via Racket Users 
On Sun, Sep 04, 2016 at 11:50:21AM -0700, Shriram Krishnamurthi wrote:
> Is there a way to have unnumbered and unindexed section? (Yes, these are 
> different issues.)
> 
> It would be helpful to have unnumbered sections, à la \[sub]section* in LaTeX.
You can use `@section[#:style 'unnumbered]` for this.

See `raco doc part` for some of the relevant style names. I'm not sure, but one 
of them ('hidden ?) may help with unindexed.

--
William J. Bowman

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Re: [racket-users] Re: lambda and the equivalent define / "defun"

2016-09-04 Thread Sanjeev Sharma 
merci & danker - 

I had just done same-parity exercise using this but did not see the equivalence

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Re: [racket-users] Re: lambda and the equivalent define / "defun"

2016-09-04 Thread Gustavo Massaccesi 
I hope these examples are enough to help with your problem:

;--
#lang racket
(define (negative . s)
  (map - s))
(negative 1 2 3 -4) ; ==> '(-1 -2 -3 4)

(define (multiply-by n . s)
  (map (lambda (x) (* n x)) s))
(multiply-by 5 1 2 3) ; ==> '(5 10 15)

(define (count . s)
  (length s))
(count 1 2 3 1 2 3) ; ==> 6
;--

Gustavo


On Sun, Sep 4, 2016 at 2:36 PM, Sanjeev Sharma  wrote:
> two "x" 's also work
>
> (define list (lambda x x))
>
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[racket-users] Scribble: unnumbered and unindexed sections

2016-09-04 Thread Shriram Krishnamurthi 
Is there a way to have unnumbered and unindexed section? (Yes, these are 
different issues.)

It would be helpful to have unnumbered sections, à la \[sub]section* in LaTeX.

It would be especially helpful to have unindexed sections. The real nuisance 
I'm trying to avoid is, say I have N sections that each have a subsection named 
"Handin Instructions". Then I get a bunch of Scribble warnings due to the 
duplicate section name. Since I have no desire to link to these sections, I 
don't need them indexed at all. And this way I don't have to cons up new names 
for each of them (though I do of course have that option…).

Thanks.

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[racket-users] Re: lambda and the equivalent define / "defun"

2016-09-04 Thread Sanjeev Sharma 
two "x" 's also work

(define list (lambda x x))

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[racket-users] lambda and the equivalent define / "defun"

2016-09-04 Thread Sanjeev Sharma 
is there a define syntax equivalent to this lambda

(define list (lambda x x x))
(list 1 2 3 4 5 "a")
;returns 
;'(1 2 3 4 5 "a")


I wanted to write subsets from SICP without 
passing the parameter as a list, and a simiar
version of average 


(define nil '())

(define (subsets s)
  (if (null? s)
  (list nil)
  (let ((rest (subsets (cdr s
(append
 rest
 (map
  (lambda (x)
(append (list (car s))
x))
  rest)

(subsets (list 1 2 3))  

; complete using the format of the simplified list lambda
(define ss
  (lambda s
(if (null? s)
  (list nil)
  (let ((rest (subsets (cdr s
(append
 rest
 (map
  (lambda (x)
(append (list (car s))
x))
  rest))

(ss 1 2 3)

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