Reproducing Programs implement Lazy Lists

Along the lines of the quine discussion happening in another thread, Manfred von Thun wrote a new page for the Joy site, Reproducing Programs implement Lazy Lists. This connects nicely with Jeremy Gibbons spigot algorithms paper, one example of which is his IOHCC 2004 submission PiSpigot.

Defining new infix operators in Python

This is an absolutely blinding hack. See if you can guess how it's done before looking at the recipe...

The Little JavaScripter

In 1974, Daniel P. Friedman published a little book called The Little LISPer. It was only 68 pages, but it did a remarkable thing...

JavaScript has much in common with Scheme. It is a dynamic language. It has a flexible datatype (arrays) that can easily simulate s-expressions. And most importantly, functions are lambdas.

Because of this deep similarity, all of the functions in The Little Schemer can be written in JavaScript.

Show your Javascripting friends the light...

Amazon Web Services in Scheme

Phil Windley is having fun with Scheme and XML (SSAX). His latest set of examples show how to use Amazon Web Services from DrScheme, and how to write DrScheme servlets.

Continuations must be next, right? :-)

Killer Props for Computer Scientist!

Who is the most thanked person in Computer Science? No, it's not Ehud Lamm, or Superman! It's...Olivier Danvy, famous PL researcher. PL research does pay (in...umm...intangible rewards).

Read the full story on Nature

Choosing a Language for Interactive Fiction

Link: Can't recall that we've ever discussed programming languages that are dedicated to authoring text adventures (much less MUDs). These languages are geared towards constructing worlds that have a built-in english language like parser. Kind of Lisp meets Prolog aspects, where the emphasis is on a declarative type of programming.

What is Universal about the Representation of Color Experience?

A study in the importance of language. We've had posts before that discuss whether and how language shapes experience, but I don't think this paper has appeared.

Only vaguely related to programming, I know, but there is a tradition here for this kind of thing (I hope!). From painquale on mefi.

Cool Python "spreadsheet"

Use eval() to drive spreadsheet style logic. The sleeper feature of Py2.4 is the ability to use any object with a mapping interface as the locals argument to eval().

Cute Python language hack.

Languages that allow you to hook into their variable lookup logic open the door to many cool hacks.

Lazy K

Lazy K is a garbage-collected, referentially transparent functional programming language, with a simple stream-based I/O system. What distinguishes Lazy K from other such languages is its almost total lack of other features.

It's SKI combinators all the way down...

Thanks, Pont!



Most modern programming languages do not consider white space characters (spaces, tabs and newlines) syntax, ignoring them, as if they weren't there. We consider this to be a gross injustice to these perfectly friendly members of the character set. Should they be ignored, just because they are invisible? Whitespace is a language that seeks to redress the balance. Any non whitespace characters are ignored; only spaces, tabs and newlines are considered syntax.

Durham students have fun again ;-)

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