Some of you saw in Chicago that I was steadfastly avoiding doctoral work
by doing some 2D OpenGL game-type stuff in Racket. I decided that I
needed a nice array implementation, and later, that it should be in
Typed Racket so I could wring out as much performance as possible.
(I've read the arr
I don't know how DrRacket is implemented, but you might want to look
at this article for ideas about ways to represent strings in a manner
that allows for efficient editing:
http://www.cs.ubc.ca/local/reading/proceedings/spe91-95/spe/vol25/issue12/spe986.pdf
Mathew Kurian wrote at 08/22/2010 10:58 PM:
1. In a text editor like Microsoft Word, in what form do they hold all
the text that a person types (a single large string or just an
appendable textbox that stores the data till the end)?
There are several different approaches for conventional tex
Hey guys,
How are yall doing? Hope everybody is swell. Its been a while since i last
posted a question, but i have few new questions popping up.
Recently, I was trying to make a text editor type thing (i.e. Wordpad) and
as usual I was bombarded with that same confusion and questions
most amateur
I am using the class system, and contracting objects. The
documentation says that objects (without implementing equal<%>) are
only equal? if they are eq?. My assumption was that when using equal?,
the contract-wrapper objects would look through to the base value and
compare them using equal? which
Try something like this.
#lang racket
(require lang/htdp-advanced
test-engine/scheme-tests)
(provide provide
[except-out (all-from-out lang/htdp-advanced) #%module-begin]
[rename-out (top-level #%module-begin)])
(require mzlib/pconvert)
(constructor-style-printing tru
Hello:
I've fiddled with it for a while (I'm admittedly new to Racket's innards, but
I've looked at the docs), and I can't seem to determine the correct way to
either evaluate code or run a read-eval-print loop in one of the HtDP teaching
languages when embedding the Racket library in a C progr
So the short-and-sweet message is that "local" and "internal define" act more
like "letrec" than like "let"? That makes sense, as it allows people to write
recursive functions. Intuitively, it seems useful to have both semantics
available to programmers.
Stephen Bloch
sbl...@adelphi.edu
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