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[Chicken-users] ANN: new egg, Stacktor

From: Mark Fredrickson
Subject: [Chicken-users] ANN: new egg, Stacktor
Date: Mon, 18 Feb 2008 22:34:29 -0600

Hi all,

I'm happy to announce my first egg: Stacktor.

Stacktor is a DSL for programming in a stack based style, like languages such as Forth or Factor. The idea came from a talk at my local Ruby user's group by Slava Pestov on Factor. While I know Slava likes Lisp/Scheme, he made an offhand joke about Lisp, and I felt obligated to show that the Lisp/Scheme world can do stack based programming too.

Here's a real quick example. Let's say we want to find all the squares of a list that are larger than a given value. In a functional style, we'd either have to write it "backwards" or use a lot of intermediate bindings. We can skip both with in stack programming:

    '(1 2 3 4 5)
    (push (lambda (x) (* x x)))
(lambda (x) (lambda (y) (> y x))) ;; returns a function that will be pushed on the stack
=> (stack 16 25)

I won't bore you with a lot details. Feel free to hit me up if you have more questions.


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