gmane.comp.lang.factor.general

Re: couchDB HTTP I/O problem

John Benediktsson — 2012-04-26T14:32:59

How long does it go before the timeout?  Is it immediately, or something
like 60 seconds?


On Wed, Apr 25, 2012 at 11:38 PM, CW Alston <cwalstonsf-Re5JQEeQqe8AvxtiuMwx3w< at >public.gmane.org> wrote:

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couchDB HTTP I/O problem

CW Alston — 2012-04-26T06:38:39

Greetings, Factoristas -


I'm looking for advice/insight on an io timeout error problem. I've built a
couchdb 1.2.0 database,

and sucessfully replicated it via curl (command line) back & forth between
my localhost cdb instance

and Cloudant and Iriscouch hosts. But when I try to POST a _replicate
command from Factor, I've found

no way to avoid an immediate closed connection and retry (terminal msg),
followed by an I/O

timeout error (listener). Looks like this:


! sample Factor code;  starred* words just alternates of couchdb vocab
(except set-keep-alive*)

: set-keep-alive* ( request -- request )  ! pipeline fiddling with headers

     "keep-alive" "connection" set-header

     "cwalston" "password" set-basic-auth  ;


: couch-http-request* ( request -- data )

    set-keep-alive*  ! ( -- request )

dup .                        ! test display (see below)

    [ http-request ] [

        dup download-failed? [

            response>> body>> json> <couchdb-error> throw

        ] [

            rethrow

Is Development Dead?

John Sampson — 2012-04-15T07:40:22

It would be good if the links from 
http://concatenative.org/wiki/view/Factor/Features/The%20language
were worth following. All one finds is blank Wiki pages.

Regards

_John Sampson_

On 15/04/2012 05:22, John Benediktsson wrote:

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Re: Is Development Dead?

John Benediktsson — 2012-04-15T04:22:12

It is true that blogging has been silent recently, but the development
branch of Factor represents a good amount of work over the last year.  You
can browse the commits on Github:

    http://github.com/slavapestov/factor

It's about time for a new release (maybe 0.95?), but there are a few minor
issues we'd like to resolve before then.

Best,
John.


On Sat, Apr 14, 2012 at 8:13 PM, graham telfer <gakousei53-PkbjNfxxIARBDgjK7y7TUQ< at >public.gmane.org>wrote:

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Is Development Dead?

graham telfer — 2012-04-15T03:13:37

Hi,

It is some time since I checked out the Factor site but I wanted to see if there was an update to version 0.94. There was no change. I checked out the blogs from Planet.Factor and noticed that all but 1 seemed to have no additions for about a year. It prompts me to ask if Factor is dead and if there will ever be a version 1?
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Re: Plotting

Jon Harper — 2012-03-20T23:37:26

There's something toi connect to Google chart apis by mrjbq7:
http://docs.factorcode.org:8080/content/vocab-google.charts.html

Jon
Le 21 mars 2012 00:26, "Luke Worth" <luke-VBRC7lpUVsK6c6uEtOJ/EA< at >public.gmane.org> a écrit :

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Plotting

Luke Worth — 2012-03-20T23:25:29

Hello,

Is there a library for plotting a dataset on a graph?
If not, I'm inclined towards producing one.

Luke

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Re: Learning Factor - string,array and io handling - beginner

Robert Herman — 2012-03-15T13:54:32

tips into my code. By 'empty string' I was referring to field or cell in
the CSV file left empty by the data input person, so all I parse out is ""
(a pair of double quotes). It stopped my program from completely walking
the directory, since I had no exceptions, everything is hard-coded. The
find command works to an extent, but I still need to chop out only the
portion I need.

Your article was a good read. Very informative for me. I still haven't
fully integrated your shorthand of my code with the map and array you used
above, because I have some cut commands between the maps, although I
completely understand the concept now.

I think I will start a new thread on a new topic. Do folks here normally
reply at the bottom of the post or inline? Thanks again.

Rob
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IDE news

Michele Pes — 2012-03-15T09:24:19

Hi to all,
If someone doesn't feel comfortable with emacs....
exists an editor that support factor syntax coloring, code folding,
source tree and basic code completion.
I use it regulary for factor and for many others programming languages.
I really suggest to give it a try, just download the latest beta.

http://www.uvviewsoft.com/synwrite <http://www.uvviewsoft.com/synwrite/>

michele pes

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Re: Learning Factor - string, array and io handling - beginner

John Benediktsson — 2012-03-14T15:33:48

"" empty?
 

"/tmp/foo" ascii [ "hello world" print ] with-file-appender 

The csv vocab makes sequences of strings.  The regexp vocab only works on strings.

IN: scratchpad "a,b,c" string>csv .
{ { "a" "b" "c" } }


You might want to look into words like "find", "find-from", or other sequence operations if you want regexp like searching or matching.

Well, "swap drop swap" is "nip swap".  But often when you are using stack shuffling words, you are not taking advantage of higher level words or combinators.  Try reading:

IN: scratchpad "combinators" help

Also, you might find this blog post I wrote on refactoring a word that has ugly stack shuffling to be useful:

http://re-factor.blogspot.com/2010/05/evenly-partition-integer.html
 


You might find something like this makes it cleaner:

utf8 file-lines
[ regexp ] filter
{ 0 1 2 } swap nths
[ string>csv ] map

Also, if you are appending and then printing, you can just write the strings as they happen, or try looking into the "make" vocabulary:

[ "Hello" % C

Re: Learning Factor - string,array and io handling - beginner

Robert Herman — 2012-03-14T13:36:21


I have been able to wak the directory and extract the data I needed thanks
to the help here. Pouring over the documentation, which is excellent by the
way and makes learning Factor enjoyable, I have learned tons. I have a few
issues with my current version.

   1. I am unsure how to check for an empty string and skip it if it is
   empty.
   2. I have been unsuccessful in getting it to write to a single file in
   an append mode, or to create a sequence of files as it goest through 'each'
   'with-directory-files'.
   3. The people who have entered the data mixed mm/dd/yyyy with dd/mm/yyyy
   in the original Excel sheets that I created my CSV sheets from. Of course
   it is easy to check for numbers > 12, but dates like 10/10/2010 are
   problematic.
   4. I had to use file-lines vs. file>csv to bring in the data, or else I
   could not get my regexp working on the CSV from file>csv.
   5. Not really an issue, but are there any cominators or other commands
   that could consolidate all of the 'swap drop sw

Re: Beginner question about style and stack shuffling

2012-03-12T19:05:29

Thank you very much for both answers.

They both are very instructive.

This one is really amazing though:

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Re: Beginner question about style and stack shuffling

Joe Groff — 2012-03-12T18:04:48

On Mon, Mar 12, 2012 at 6:00 AM, nicolas.oury-Re5JQEeQqe8AvxtiuMwx3w< at >public.gmane.org
<nicolas.oury-Re5JQEeQqe8AvxtiuMwx3w< at >public.gmane.org> wrote:

Instead of collecting piles of related values on the data stack and
using n-ary variants of dataflow words, dataflow often becomes clearer
when you construct an object to contain related values. In your
swap-element case, each index-array pair could each be collected into
an `array-ref` object. After defining some operations on `array-ref`s,
the swap functionality becomes much easier to express (aside from the
somewhat awkward `bi-curry bi*` necessary to express transposed 2x2
dataflow):

```
TUPLE: array-ref index array ;
C: <array-ref> array-ref
: >array-ref< ( array-ref -- index array )
    [ index>> ] [ array>> ] bi ;
: get-ref ( array-ref -- elt )
    >array-ref< nth ;
: set-ref ( value array-ref -- elt )
    >array-ref< set-nth ;

: swap-refs ( x-ref y-ref -- )
    [ [ get-ref ] bi< at > swap ] 2keep
    [ set-ref ] bi-curry bi* ;
```

-------------------------

Re: Beginner question about style and stack shuffling

Jon Harper — 2012-03-12T13:45:31

What about using local only to implement the difficult stack shuffling
that you named "????" ?
:: ???? ( a b c d e h -- d b c a e h )
    d b c a e h ;
: swap-element ( i1 array1 i2 array2 -- )
    [ [ nth ] 2keep ] 2bi< at > ???? [ set-nth ] 2 smart-apply ;

And you could name "????"  "(swap-element)" which is the convention
for helper words that don't have much sens by themselve. Or
"swap-data". Or leave it as "????" because really it's self
explaining.

Oh and your question reminded me of
http://useless-factor.blogspot.com/2007/07/thats-dirtiest-macro-ive-ever-seen.html
which was a fun read :)

Alternatively, why do you find yourself in need to swap elements
between 2 different arrays ? Maybe you could organize the data in a
different way ?
Jon

On Mon, Mar 12, 2012 at 2:00 PM, nicolas.oury-Re5JQEeQqe8AvxtiuMwx3w< at >public.gmane.org
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Beginner question about style and stack shuffling

2012-03-12T13:00:34

Dear all,

I am starting to learn Factor as my first concatenative language (from
a FP background) and enjoy it very much.

However, when trying to write simple words I get stuck on how to best
express dataflow.

As a (very very simple) example, I am trying to write a word

: swap-element ( i1 array1 i2 array2 -- )

that swaps two elements with indices i1 and i2 from 2 (aliased or not) arrays.

It is very easy to write such a word using lexical variables.

However, I have two problems with that:
 - I am not sure it is the right tool to use or just my brain bringing
me back to what I know.
 - It does not show the symmetries of the dataflow of this word

I quite like the style of something along the lines of:

: swap-element ( i1 array1 i2 array2 -- )
  [  [ nth  ] 2keep  ] 2bi< at > ???? [ set-nth ] 2 smart-apply ;

because it shows the dataflow better than with lexical variables.

But I can't find something nice to put instead of ????.

So, I guess that my question is: how to solve this problem and, more
importan

Re: Learning Factor - string,array and io handling - beginner

Joe Groff — 2012-03-11T18:46:04

USE: is for importing a single module, as in `USE: foo`. It's
primarily intended as a shorthand for interactive use. In source code
you should always write out USING: as in `USING: foo bar ;`.


To iterate over the files in a directory, I would recommend looking at
the `with-directory-files` function, which will change to a directory
then call a quotation with a sequence containing the names of the
files in that directory. You should be able to just use `each` to
apply your existing code over that sequence.

-Joe

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Re: Learning Factor - string,array and io handling - beginner

Robert Herman — 2012-03-11T10:50:27


Thank you, Joe.
NOTE: I changed my settings to not receive the digest, since I cannot for the 
life of me figure out how to reply to a single email in the digest in gmail. 
This is a reply through gmane.org.

Now on to business.

The Windows errors I had were mainly due to user error by creating my own 
.factor-rc file using the 'copy con' in the command shell on Win 7 to be able to 
create a 'dot' file. Plus I placed it in the 'c:\Users\login_name\factor' 
directory instead of 'c:\Users\login_name'. Now it works, and the .factor-rc 
file properly sets my name as the default author when using scaffold. I still 
have issues with missing vocabulary references ( cannot find 'csv', etc..) when 
I copy/paste from my text editor to the Listener, frustrating me with the USE: / 
USING: usage.

I am still not clear on the use of USE: or USING: when I am coding in SciTE and 
copying and pasting to the Listener. Also, now that I have a working bunch of 
code lines, I would like to be able to execute it, but when I ty

Re: Learning Factor - string,array and io handling - beginner

Joe Groff — 2012-03-10T17:35:12

How did you end up solving these problems?


How were you using the CSV library? I had no problem pasting your
example data and loading it as follows:

```
IN: scratchpad "/Users/joe/testcsv.txt" utf8 file>csv .
{
    { "Show Report" "" "" "" "" }
    { "Show Name:" "TTTTT1 " "" "" "" }
    { "Show Date:" "24/02/2012 (Fri)" "" "" "" }
    { "Show Time:" "05:00:00 PM" "" "" "" }
    { "Venue:" "DDDDDD WWWWW TTTTTTT" "" "" "" }
    {
        "Door Open:"
        "04:30:00 PM"
        ""
        "Admission Time:"
        "30 mins"
    }
    { "Announcement:" "05:00:00 PM" "" "" "" }
    {
        "Show Start:"
        "05:02:00 PM"
        ""
        "Show End:"
        "06:29:00 PM"
    }
    {
        "Door Close:"
        "06:37:00 PM"
        ""
        "Dismission Time"
        "8 mins"
    }
    { "" "  " "" "" "" }
    { "Duration:" "87 mins" "" "" "" }
    { "Ticket issued:" "1029" "" "Total Attendance" "998" }
    {
        "Remarks:"
        "1. blah blah blah blah blah blah blah blah blah."

Re: Learning Factor - string,array and io handling - beginner

Marshall Lochbaum — 2012-03-10T16:41:46

group in the grouping vocabulary splits a sequence into subsequences, like
this:

( scratchpad ) { 3 6 2 5 8 7 } 2 group .
{ { 3 6 } { 2 5 } { 8 7 } }

It would be a good idea to first flatten the list and then run 2 group on
it.

Marshall

On Sat, Mar 10, 2012 at 7:44 AM, Robert Herman <rpjherman-Re5JQEeQqe8AvxtiuMwx3w< at >public.gmane.org> wrote:

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Learning Factor - string,array and io handling - beginner

Robert Herman — 2012-03-10T12:44:18

I solved Windows-specific installation issues I had with Factor, and now I
have moved on to playing with Factor. I thought I would best learn it by
trying to accomplish a work-related task with it instead of just trying to
rewrite some previous python code. Anyway, I have a CSV formatted file that
has been exported from an Excel file. The original Excel sheet was laid out
like a horizontal form, so there is no easy relationship between headers
and rows. Please forgive me, and tell me if I should put the code or file
snippet elsewhere, and I will do so in future posts.

Here is a sample of the CSV output:

"Show Report",,,,
I simply wanted the value right after Show Date: 24/02/2012, Ticket issued:
1029 and Total Attendance 998, like so: 24/02/2012,1029,998
I don't need headers.
Here is the code I have been using in the listener:

USING: io.encodings.ascii io.encodings.utf8 regexp csv
 This gets me 95% of the way there, but it is surely not the cleanest or
Factor-like way to go. Here's the file contents resul

Re: Crashes in Win32

Doug Coleman — 2012-03-08T21:36:57

My bad, I sent it that too soon.

Here's the archive of past builds. Some of the ones in 2011 should be
pretty stable.

http://downloads.factorcode.org/windows-x86-32/

Doug


On Thu, Mar 8, 2012 at 1:34 PM, Doug Coleman <doug.coleman-Re5JQEeQqe8AvxtiuMwx3w< at >public.gmane.org> wrote:

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