Discussion about the Factor programming language.

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kabelo moiloa | 12 May 2013 18:38

Code Review: Game of Life

Hi there,

I ported a Clojure implementation of Conway's Game of Life to Factor.

Here is the original Clojure version: http://clj-me.cgrand.net/2011/08/19/conways-game-of-life/

Here is my Factor port: http://paste.factorcode.org/paste?id=2932

How can I make the Factor variant more elegant and/or idiomatic?

Kind Regards,

Kabelo Moiloa

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mr w | 12 May 2013 08:19

multiple files

Is it possible to have multiple files in the work directory?

Each file contains words to be attached to the same vocabulary root.

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mr w | 4 May 2013 08:35

site down

Site down, no posts ... factorcode rapture?

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Leon Konings | 23 Apr 2013 15:50

Went open source with my GA144 simulator written in Factor

I am happy to say, I went public with the GA144 Simulator, I wrote in Factor.

As you might know the GA144 is a chip containing 144 small computers.  
Invented by Chuck Moore and produced by Greenarrays, Inc. See:  
http://www.greenarraychips.com/

It is a rather big project with the name arrayFactor. The repository  
is at Bitbucket. You can reach it via http://arrayfactor.org

Best regards,
Leon

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Loryn Jenkins | 22 Apr 2013 16:17

Idiomatic use of sequences for iterative functions?

In "Factor Philosophy", slava writes: "Imperative programming and indexed loops are almost always not the most idiomatic solution."

I've implemented this puzzle ( http://mindyourdecisions.com/blog/2013/04/22/100-light-bulbs-puzzle/ ) using a side-effecting function: http://paste.factorcode.org/paste?id=2914

The words do-switching and toggle-switches implement the equivalent of a nested loop.

Without using recursion, counted for loops or side-effecting functions, what is an idiomatic way of implementing this nested iteration?

Loryn Jenkins

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John Benediktsson | 22 Apr 2013 15:20

Re: Confused about run-pipeline

The example is simple and works fine:

{ "cat log.txt" "grep error" "sort" "uniq" } run-pipeline

Can you explain the more complicated thing you're trying to do?

On Mon, Apr 22, 2013 at 4:30 AM, CW Alston <cwalstonsf-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:

Factor folks -

I'm missing something trying to properly set up the components

of a sequence to be passed to run-pipeline. I intend the components

to be:

(1) a process launch descriptor, with stack effect ( -- desc ) ;

(2) a quotation composed only of run-detached, stack effect ( desc -- process ) ;

(3) a quotation to store the proc in a variable, stack effect ( process -- );

-these followed by quotations of words with stack effect ( -- ),

all duly wrapped in a sequence { … }.

The word description for run-pipeline says that run-pipeline:

"Creates a pipe between each pipeline component, with the output of each component becoming the input of the next.

The first component reads input from input-stream and the last component writes output to output-stream.

Each component runs in its own thread, and the word returns when all components finish executing. Each component outputs a result value."

My sundry attempts to meet these requirements typically result in a

data stack underflow on execution, or an aberrant stack effect during compile.

Can anyone sketch a proper set-up for generic requirements like mine,

to successfully pass a component sequence to run-pipeline?

Thanks for any suggestions,

~cw

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Alexander Mueller | 22 Apr 2013 15:13

Re: Confused about run-pipeline

i guess you wand to use run-pipeline on factor quotes instead of just unix commands so you would dispatch to run-pipeline-element on a callable instead of a "object" which i guess is a string (?)

i would just throw a quote instead of a string into the sequence and it should just work as long as run-pipeline creates input/outputs for it, your quotation would though need to read stdin and write stdout i guess so it would "fit in"

On Mon, Apr 22, 2013 at 1:30 PM, CW Alston <cwalstonsf-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:

Factor folks -

I'm missing something trying to properly set up the components

of a sequence to be passed to run-pipeline. I intend the components

to be:

(1) a process launch descriptor, with stack effect ( -- desc ) ;

(2) a quotation composed only of run-detached, stack effect ( desc -- process ) ;

(3) a quotation to store the proc in a variable, stack effect ( process -- );

-these followed by quotations of words with stack effect ( -- ),

all duly wrapped in a sequence { … }.

The word description for run-pipeline says that run-pipeline:

"Creates a pipe between each pipeline component, with the output of each component becoming the input of the next.

The first component reads input from input-stream and the last component writes output to output-stream.

Each component runs in its own thread, and the word returns when all components finish executing. Each component outputs a result value."

My sundry attempts to meet these requirements typically result in a

data stack underflow on execution, or an aberrant stack effect during compile.

Can anyone sketch a proper set-up for generic requirements like mine,

to successfully pass a component sequence to run-pipeline?

Thanks for any suggestions,

~cw

--
~ Memento Amori

------------------------------------------------------------------------------
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analytics on semi-structured data. The platform includes APIs for building
apps and a phenomenal toolset for data science. Developers can use
our toolset for easy data analysis & visualization. Get a free account!
http://www2.precog.com/precogplatform/slashdotnewsletter
_______________________________________________
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CW Alston | 22 Apr 2013 13:30

Confused about run-pipeline

Factor folks -

I'm missing something trying to properly set up the components

of a sequence to be passed to run-pipeline. I intend the components

to be:

(1) a process launch descriptor, with stack effect ( -- desc ) ;

(2) a quotation composed only of run-detached, stack effect ( desc -- process ) ;

(3) a quotation to store the proc in a variable, stack effect ( process -- );

-these followed by quotations of words with stack effect ( -- ),

all duly wrapped in a sequence { … }.

The word description for run-pipeline says that run-pipeline:

"Creates a pipe between each pipeline component, with the output of each component becoming the input of the next.

The first component reads input from input-stream and the last component writes output to output-stream.

Each component runs in its own thread, and the word returns when all components finish executing. Each component outputs a result value."

My sundry attempts to meet these requirements typically result in a

data stack underflow on execution, or an aberrant stack effect during compile.

Can anyone sketch a proper set-up for generic requirements like mine,

to successfully pass a component sequence to run-pipeline?

Thanks for any suggestions,

~cw

--
~ Memento Amori

------------------------------------------------------------------------------
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analytics on semi-structured data. The platform includes APIs for building
apps and a phenomenal toolset for data science. Developers can use
our toolset for easy data analysis & visualization. Get a free account!
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John Benediktsson | 21 Apr 2013 06:44

Factor 0.96 now available

"You're smart too late and old too soon." - Mike Tyson

I'm very pleased to announce the release of Factor 0.96! You can

find download links on the Factor website:

http://factorcode.org

This release is brought to you with over 1,100 commits by the following

individuals:

Alex Vondrak, Benjamin Pollack, Daniel Nagel, Doug Coleman, John

Benediktsson, Jon Harper, Michael T. Richter, and <at> PGGB.

Aside from bug fixes and various library improvements, I want to highlight the

following changes:

* Major compiler improvements (thanks Alex Vondrak!):

* Global Value Numbering (disabled currently by default)

* Parallel-Copy Semantics

* Performance improvements to hashtables, hash-sets, heaps, and bloom-filters.

* Support for Retina Displays on OS X

* Greatly improved table gadget performance

* PDF streams (and related PDF documentation)!

* Speed up math comparisons

* Support resize-window (thanks Jon Harper!)

* New logo and icons for Factor

* Added editor support for Textadept, Sublime Text, Geany, BBEdit, and XCode.

Some possible backwards compatibility issues:

* Changed <groups>, <clumps>, and <circular-clumps> to use slices.

* Removed <slicing-groups>, <slicing-clumps>, <slicing-circular-clumps>.

* Renamed editors.notepadpp to editors.notepad++.

For more details, please see the full announcement at:

http://re-factor.blogspot.com/2013/04/factor-0-96-now-available.html

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Luke Worth | 18 Apr 2013 00:12

C++ bindings

Hi,

I'm interested in binding to a C++ library. I know about alien.cxx, but it seems incomplete - e.g. doesn't
support visual studio - also it seems like a crazy idea to bind directly to the mangled C++ symbols for a
bunch of different compilers, and also it is unmaintained.

Can anyone tell me if there is a reason that library was discontinued? Otherwise I'm interested in
finishing the library (if that turns out to be practical), or perhaps extending SWIG to support factor.

Regards,
Luke Worth
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mr w | 15 Apr 2013 04:27

stack contents during operation of sequence combinator

Anyone know what the stack looks like during the execution of a
sequence combinator?

For example, the quot passed to map expects ...

quot,	a quotation with stack effect ( ... elt -- ... newelt )

Are there any guarantees on the "..." in "... elt"?

Does "seq quot map" remain on the stack while quot is applied to each element?

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