On Apr 16, 2012, at 5:18 PM, Neil Van Dyke wrote:
> ... if one is still looking for additional beginner programming exercises, I
> think that one not-totally-bad option is to start picking standard algorithms
> and data structures one can learn about by search the Web and in books (e.g,
> sort
You are so right, Neil,
I've been slowly learning more and more idiomatic Racket. Some things I've
picked up:
1) avoid mutators (see above)
2) avoid side-affects, use return values
3) Use list comprehensions and other powerful procedures (for*, for/list,
foldl, map, etc)
4) Don't be afraid to wr
Small followup: we can do something like the following to let Racket
do most of the hard work.
;
;; A little syntax to bind the name that Racket is inferring in the
surrounding context.
(define-syntax (with-inferred-na
> For:
>>stronger
> Why does DrRacket print #
> and not #
Hi Harry,
Racket's compiler has some special behavior to infer what the name of
a procedure value should be. For example, at compile time, if it sees
something of the form:
(define some-name (lambda ...))
or (let ([some-name (lamb
A good thing about exercises coming from an introductory textbook is
that they are usually appropriate for the material instruction that the
student has received at that point in the book. (Ideally, there is a
mostly linear progression through the book.)
However, if one is still looking for a
Dear list members:
In DrRacket
Given the following definitions in the definitions window:
---
#lang racket
(define (double expr) ((if (string? expr) string-append +) expr expr))
(define (twice fn x) (fn(fn x)))
(define (lo
The problems at projecteuler.net are also a good way to get up to speed
with a new language.
-Joe
On Mon, Apr 16, 2012 at 8:58 AM, Danny Yoo wrote:
> > Im following the book Desiging programms second edition.
> > I'm now at the end of chapter 2 and I get the idea I need some extra
> > exercises
There has recently been some discussion on the list about the
Racket license, and we wanted to make our perspective clear. Our
primary goal is to help as many people as possible use and
contribute to Racket. We encourage anyone to develop any kind of
software, with any kind of license, using Racke
> Im following the book Desiging programms second edition.
> I'm now at the end of chapter 2 and I get the idea I need some extra
> exercises so I can practice more to follow the desin recipe, difference
> between a global variable and a function parameter.
> Are there somewhere some extra exercise
It works without crashing. Will do more testing.
Thank you.
On Sun, Apr 15, 2012 at 2:00 AM, Ryan Culpepper wrote:
> I just pushed some fixes to MySQL's handling of fields larger than about
> 64k. One of the bugs I fixed would account for the out-of-memory error (it
> sometimes tried to allocate
Hi
I am using DrRacket to run my programs. Just some time back, I got the
following error:
"insert-file in text%: error loading the file
(mf-not-okay-after-adding-standard-style)"
Could you please help me open my file?
Thanks
Regards
Prachi Khadke
Racket Users list:
htt
I've been using the "crypto" library of Dimitris Vyzovitis, which is
also based on openssl. It hasn't been updated for a while, but works
fine with symmetric algorithms.
Best,
Erich
On Sun, 15 Apr 2012 17:13:00 +0200
Rüdiger Asche wrote:
> Hi there,
>
> in my Racket code, I need to crypt/
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