Re: [Pharo-users] UK Smalltalk User Group Meeting - Wednesday, May 27th

[Andy Burnett]

> Any chance the meeting could be recorded? I want to attend, but it is 
> clashing with a work meeting. 

Cheers
Andy
> 

Re: [Pharo-users] About the IoT Hackathon last Friday

[Andy Burnett]

Do you think there is anyway we could run one of these virtually? I would love 
to have been involved, but finding time to travel is tricky. A virtual (or 
blended) event would be much easier. If it helps, I have a corporate Zoom 
account thst would support up to 500 participants - gotta think big :-)

Cheers
Andy

[Pharo-users] Using ZnEasy getPng: with an octet-stream

[Andy Burnett]

Next step of my Asana adventure.

In a browser

https://s3.amazonaws.com/profile_photos/206785263586755.0mU1QMOxVZLp3WiRWhWX_128x128.png

downloads a png.

When I try ZnEasy getPng: with the same address, I get a walkback saying
expected image/png actual application/octet-stream.

Is it possible to handle this with ZnEasy, or do I have to use the ZnClient
and handle the stream first?

Cheers
Andy

Re: [Pharo-users] Adding an Authorization Bearer header via Zinc

[Andy Burnett]

Norbert said

<<<
You have a colon in the name of the header. I?m not sure zinc removes it.
It could be a problem.

>>>

Ah, spot on. Apparently, we need the colon for Curl, but not for Pharo.
Also, response setAuthorization turned out to be the best approach. For
anyone searching this list, in the future,  for Asana connectivity, my PoC
is:

tmp1 := ZnClient new.
tmp1 request setAuthorization: 'Bearer ';
url: 'https://app.asana.com/api/1.0/users/me'.
tmpJSON := NeoJSONReader fromString: tmp1 get.

[Pharo-users] Adding an Authorization Bearer header via Zinc

[Andy Burnett]

I am building some pharo scripts to edit tasks in the Asana.com system.

I have generated a Personal Access Token, and the terminal command of:

curl -H "Authorization: Bearer 12345abc"
https://app.asana.com/api/1.0/users/me

Returns 200/ok, and the right data.

However, the pharo commands

tmp1 := ZnClient new.
tmp1 headerAt: 'Authorization:' put: 'Bearer 12345abc'.
tmp1 url: 'https://app.asana.com/api/1.0/users/me'.
tmp1 get.

Results in an authorisation error.

I haven't tried using Zinc to access authenticated sites before, what am I
doing wrong?

Cheers
Andy

Re: [Pharo-users] Gemstone as a service?

[Andy Burnett]

James wrote:
<<<
Will you be coming to ESUG? Perhaps we could discuss this in more detail
after my talk on Wednesday at 12:30 (https://esug.github.io/2018-
Conference/conf2018.html ).

>>>

Unfortunately not, so I will have to wait for the slides, and video.
However, this does sound encouraging.

Might GemTalk get into the business of offering GaaS? Perhaps through
Heroku or similar.

Cheers
Andy

[Pharo-users] Gemstone as a service?

[Andy Burnett]

Hello,
I was wondering if anyone offers GaaS? I would love to be able to just
focus on writing code, and leave the system management to others. Gemstone
does seem to offer a very complete package.

Also, does anyone know what's happening with Pharocloud? The site is still
running, but it seems to be very quiet.

Cheers
Andy

Re: [Pharo-users] Dynamically updating the inspector window

[Andy Burnett]

Andrei said
>>>
Are you in Pharo 6.1? There is a setting to enable automatic refresh in the 
inspector. I think it's called Step Refresh in the settings browser.Should be 
enabled by default in Pharo 7.

Just now all presentations from the inspector have the automatic refresh 
implemented.


That’s great!
Thanks very much.

[Pharo-users] Dynamically updating the inspector window

[Andy Burnett]

Is there a way to make the inspector automatically update itself, when the
value it is inspecting changes?  For example, if I were inspecting an
array, and at:1 put: 'blah' I would like the inspector to reflect that
change.

I know I can get the window to update by clicking the refresh icon, I just
wondered if there is a 'live' way to do this?

Cheers
Andy

Re: [Pharo-users] Is there a way to stop arrays sorting automatically?

[Andy Burnett]

Richard wrote
>>>

I would check this in Pharo, but have so far failed to get it running under
Ubuntu 17.10.
Squeak _is_ running there, sort of, and the definition of #permutationsDo:
in Interval
is this code:

permutationsDo: aBlock
"Repeatly value aBlock with a single copy of the receiver. Reorder the copy
so that aBlock is presented all (self size factorial) possible
permutations."
"(1 to: 4) permutationsDo: [:each | Transcript cr; show: each printString]"

self asArray permutationsDo: aBlock

Exactly the same comment is found in SequenceableCollections.

Are you sure that Pharo has something different?  "with a SINGLE COPY of
the receiver" is pretty important.
...
<<<

Thanks Richard. The Pharo comment is identical. The problem was simply that
I hadn't understood what it was - quite clearly - telling me. Now that I
understand the problem, the explanation makes perfect sense :-)

Cheers
Andy

Re: [Pharo-users] Is there a way to stop arrays sorting automatically?

[Andy Burnett]

Henry said


It's not broken, but certainly deserves a comment as to why it operates
inline;
In the general case, one should not use/care about any given permutation
outside the block.
Allocating n! instances of an n-sized array by default, is a bad tradeoff
considering performance degradation for uses where n >> 3.
In the first case, a user can add a simple #copy, while in the second case,
a user would probably want/have to reimplement the method entirely.
<<<

Thanks, that makes perfect sense. I will have a go at adding a suitable comment.

Cheers
Andy

>

Re: [Pharo-users] Is there a way to stop arrays sorting automatically?

[Andy Burnett]

Denis wrote
>>>

It's same as any other code. Just follow instructions
https://github.com/pharo-project/pharo/wiki/Contribute-a-fix-to-Pharo. It
is now simplified a lot.

<<<

Wow! That has improved a lot. I have bookmarked the site, and I now have a
reason to learn iceberg.

Out of curiosity, and perhaps this has been answered elsewhere, why are we
using fogbugz for issue tracking, rather than github's issue tracker? I
know nothing much about either of them. I am just curious if fogbugz is
much better?

Cheers
Andy

Re: [Pharo-users] Is there a way to stop arrays sorting automatically?

[Andy Burnett]

Ben wrote >>>

Its not so much that your first example sorted the permutations, but that
the collection contained only one permutation.
I've swapped the order of your examples and downsized them to the simplest
case to observe.
Something seems broken.  It works as expected if the "copy" is uncommented.

  Transcript clear.
  oc1 := OrderedCollection new.
  oc2 := OrderedCollection new.
  Transcript crShow:'a---'.
  (1 to: 3) permutationsDo: [ :each | Transcript crShow: each.   oc1 add:
each asOrderedCollection].
  Transcript crShow:'b---'.
  (1 to: 3) permutationsDo: [ :each | Transcript crShow: each.   oc2 add:
each "copy"].
  Transcript crShow:'c---'.
  Transcript crShow: { oc1 asSet size. oc2 asSet size}.
  Transcript crShow:'d---'.
  oc2 do: [ :x | Transcript crShow: x ].

==>
a---
#(1 2 3)
#(1 3 2)
#(2 1 3)
#(2 3 1)
#(3 2 1)
#(3 1 2)
b---
#(1 2 3)
#(1 3 2)
#(2 1 3)
#(2 3 1)
#(3 2 1)
#(3 1 2)
c---
#(6 1)
d---
#(1 2 3)
#(1 2 3)
#(1 2 3)
#(1 2 3)
#(1 2 3)
#(1 2 3)

cheers -ben

<<<

Thanks Ben,
That is really interesting. I had completely misunderstood the problem.
Checking the items in oc2 shows that they are literally the same object.
So, it would seem that I have to run copy, or some other method to get a
unique object.

I can see that this would make sense from an efficiency perspective.
Reusing the same object would presumably save memory space. However, it
would probably be good to update the comment to let people know that this
will happen.

What is the process for submitting suggested improvements to class comments?

Cheers
Andy

[Pharo-users] Is there a way to stop arrays sorting automatically?

[Andy Burnett]

I suspect I am missing something very obvious, in which case could some
kind soul put me straight?

I have the following code

col := OrderedCollection new.
(1 to: 9) permutationsDo: [ :each | col add: (each )].

I thought this would give me a collection containing all the permutations.
However, what actually happens is that each of the arrays has been
'magically' sorted back into numerical order.  If I change the code to read

col := OrderedCollection new.
(1 to: 9) permutationsDo: [ :each | col add: (each asOrderedCollection )].

Then the permutations are retained.  Is this how it is supposed to work?
Or, am I doing something wrong?

Cheers
Andy

Re: [Pharo-users] Is there a way to set form colours using a 'fuzzy' option?

[Andy Burnett]

Nicolai wrote
>>>

You can draw a new form with copybits and use your own color mapping.

First, I thought there would be a bitblt operation that you could use
without explicit calculating the color mapping, a paint operation that
would convert a gray-value to an alpha value. But I could find it.

In this special case (black text on white background) you can use an
existing method for calculating this color map. This method is used by
strike font to create apropriate glyph forms from its font bitmap. (A large
bitmap with black characters on a white background.)

Here is an example that first, creates a form with black text on white
background, and than computes the color map and copys the source form in a
new form:

"create a test form "
sourceForm := Form extent: 300@150 depth: 32.
sourceForm fillColor: Color white.

"draw some black, bold text"
text := 'Hello World' asText.
text addAttribute: (TextFontReference toFont: (LogicalFont familyName:
'Source Sans Pro' pointSize: 32)).
text addAttribute: (TextColor color: Color black).
text addAttribute: (TextEmphasis bold).
text asMorph drawOn: sourceForm getCanvas.

"create a morph for displaying this form"
sourceImageMorph := ImageMorph withForm: sourceForm.
sourceImageMorph openInWorld; topLeft: 300@300.

"calculate the colormap"
colorMap := Color computeColorConvertingMap: Color black from: 32 to: 32
keepSubPixelAA: false.

"copy the source form bits to a new form of the same size"
newForm := sourceForm deepCopy copyBits: sourceForm boundingBox from:
sourceForm at: 0@0 colorMap: (colorMap).

"create a morph for displaying this form"
newImageMorph := ImageMorph withForm: newForm.
newImageMorph openInWorld; topLeft: 300@500.

<<<

Thanks Nicolai
That is very helpful. However, I agree with you that this is probably
something BitBlt should be able to handle. I have been looking at how they
do this in mathematica, and they have some interesting approaches.

Cheers
Andy

[Pharo-users] Is there a way to set form colours using a 'fuzzy' option?

[Andy Burnett]

I have an image with black text, and a white background. I would like to
set the white pixels to transparent. I worked out how to do this, but of
course it leaves me with a white halo around the text, where the border
pixels are almost white, but not quite.

In googling about this, I discovered that RMagick has the idea of replacing
pixels which are almost any particular colour. I didn't find anything
similar in the ColorForm class. Is there a way to do this within Pharo?

Cheers
Andy

Re: [Pharo-users] How do you store and manage small programs?

[Andy Burnett]

Wow! What a great collection of answers. Thanks everyone, I learned a lot
from that relatively simple question.

I have installed QuickAccess - that's very cool. And, I have also tried the

[Pharo-users] How do you store and manage small programs?

[Andy Burnett]

I have just created a couple of small playground scripts that do some useful 
data wrangling. The chances are that I will reuse them from time to time, but 
with tweaks. Does version 6 Have some way to store them? I think I am after a 
sort of scripts catalogue.

Re: [Pharo-users] How does one specify a format for an ImageMorph based on a binary stream

[Andy Burnett]

Thanks @Hilaire and @Sven. I had misunderstood the purpose of the imageExport 
method.

Cheers
Andy

[Pharo-users] How does one specify a format for an ImageMorph based on a binary stream

[Andy Burnett]

I am trying to do some simple image manipulation. Basically, I want to
subtract one image from another, to see what's left.

As an experiment, did

aStream := ReadStream on: image1 imageExport.
newImageMorph := ImageMorph fromStream:aStream.

Unfortunately, this fails because there is no subclass to handle the binary
stream. I couldn't find a way to specify what format the image was in.
Does anyone know how to do this?

Cheers
Andy

Re: [Pharo-users] [Pharo-dev] [ANN] JSONWebToken

[Andy Burnett]

I am really interested in this work on JWT. We've been using it quite a lot. 
For instance we use JWT to link an application written in PHP to a Firebase 
backend.

Works beautifully.

The thing that I am still trying to wrap my head around, is whether there is a 
– standard – way of using the claims asserted in the JWT token to control 
access to objects in a Pharo/seaside application.

I know that gemstone has an access control list system but does anything like 
that exist in Pharo? If not, how do people control access to the data?

Cheers

Andy,

Re: [Pharo-users] If you have to do web data scraping, what tool would you use?

[Andy Burnett]

I had a similar question, which led me to the Webdriver project (now part of 
selenium).

I haven't done any experiments yet, but the idea of driving the browser via its 
API is appealing.

The Parasol project says it is a Webdriver implementation for Pharo, and it 
looks quite exciting. The build is currently failing, but that seems to be a 
gemstone problem.

https://github.com/SeasideSt/Parasol/blob/master/README.md

If you have time to play with it I would love to hear your experience.

Cheers
Andy


> 

Re: [Pharo-users] Call for feedbacks: Enterprise Pharo ePub version

[Andy Burnett]

On 30 May 2016 at 11:32, Damien Cassou <damien.cas...@inria.fr> wrote:

> Andy Burnett <andy.burn...@knowinnovation.com> writes:
> > Works very nicely on my iPhone. It would be great to have all the books
> in
> > this format.
>
> you can encourage us doing so by making a donation to ESUG which
> sponsors our books.
>
>
Great idea!  And, I have just done it :-)

Re: [Pharo-users] Call for feedbacks: Enterprise Pharo ePub version

[Andy Burnett]

>
>
> Hi,
>
> I created an ePub version of the book Enterprise Pharo for electronic
> readers.
> It would be great if you could test it and give me feedbacks on everything
> that shocks you.
>
> You can downlod the file here<
> http://files.pharo.org/books-ressources/entreprise-pharo/>.
>
> Thanks,
> Thibault
>

Works very nicely on my iPhone. It would be great to have all the books in
this format.

Cheers
Andy

[Pharo-users] Why is split: implemented in the separator rather than the string?

[Andy Burnett]

>
>
>
> Message: 1
> Date: Thu, 19 May 2016 20:18:09 -0700
> From: John Pfersich 
> To: Any question about pharo is welcome 
> Subject: Re: [Pharo-users] Why is split: implemented in the separator
> rather  than the string?
> Message-ID: 
> Content-Type: text/plain;   charset=us-ascii
>
> If you want to do it reversed, do it like this:
>
> '1969-07-20' splitOn: '-'
>
>
> Thanks to both of you for responding. Makes sense.


Cheers
Andy

[Pharo-users] Why is split: implemented in the separator rather than the string?

[Andy Burnett]

I keep getting this wrong, which makes me wonder why we send split: to the
separator rather than the thing to be split. Is there a benefit to doing

$- split: '1969-07-20'

rather than

'1969-07-20' split: $-  (which somehow seems more natural to me).

Cheers
Andy

[Pharo-users] Machine learning in Pharo

[Andy Burnett]

Are there any ML libraries in Pharo? I want to build a document classifier for 
the contents of an RSS feed. I was hoping to try this in Pharo.

Cheers
Andy

[Pharo-users] Interleaving strings

[Andy Burnett]

I have two strings, which are typically of different lengths, and I want to
interleave them, i.e.:

'abcdefg' interleaveWith: '123'

Would produce

'a1b2c3defg'

I know how to write this procedurally, but I have been very impressed by
what Sven shows in his Medium articles, so I wondered if there is any
existing mechanism that would allow me to solve this elegantly?
 with:collection: almost does it, but the collections have to be the same
size.

Cheers
Andy

[Pharo-users] Re RFC Minecraft Server

[Andy Burnett]

Ben said
>>>
Which one?
<<<

The one people seem to use is called pocket mine. (https://www.pocketmine.net). 
There may be others.

>>>
I was thinking of the standard PC version since I understood the PE
version was not so amenable to mods. Actually my kids have been
playing PE edition on iPads, and I bought them second hand laptops to
run the PC edition to do modding. Still discovering how it all works.
<<<

The PE (iPad etc) version seems to be catching up in terms of features, and it 
does allow some level of mods. However, I agree that the full PC version is 
probably the better target.

I wonder if there are any docs that list the Api we need to support.

[Pharo-users] Re RFC Minecraft Server

[Andy Burnett]

I think that is a really exciting idea. I would love to help.

Are you thinking about a minecraft, or minecraft PE server?

My kids play minecraft on their iPads and this isn't compatible with PC based 
minecraft. However, there is a nice minecraft PE server - written in PHP.

Cheers
Andy

Re: [Pharo-users] Using Playgrounds as a notepad

[Andy Burnett]

Thanks everyone!
I completely forgot that I should ctrl+s on the workspace. I think I have
just become too used to google docs etc., and it didn't occur to me that I
had to save in order to update a model.

Right, I now have two ways forward, and they both look useful for different
problems.

ws := Workspace open

Gives me a simple way to paste in text, and do some initial hand editing

Clipboard clipboardText

Will be great when I know there is a 'clean-up' method that I need to run
on e.g. a table I have grabbed from the web.

Cheers
Andy

Re: [Pharo-users] Using Playgrounds as a notepad

[Andy Burnett]

@Dimitris

Thanks for the Workspace idea. That is pretty much what I am looking for.
However, I am struggling to get it to behave the way I want.
When I type into the Workspace, and then inspect

ws contents

I just get an empty string. Is there a simple way to get the ws to update
its contents so that I can access it?

@Sven, @Doru. Thanks. The Clipboard approach is very slick. I will use that
for the time being. Out of curiosity, is it possible to access any other
data on the clipboard. For instance, if I copy a pictured from my desktop,
is that accessible via the Clipboard object? I only saw text oriented
methods.

Thanks
Andy

[Pharo-users] Using Playgrounds as a notepad

[Andy Burnett]

I often find that I need to do simple manipulations to passages of text,
e.g. remove all carriage returns, or extract email addresses etc.

Pasting the text into a Playground doesn't work because there is always an
apostrophe, or line break or... etc. and the playground complains.

Is there a way to tell a Playground to just ignore the text, and give me a
handle to its contents, so that I can then do something like

playgroundId contents splitOn:Character space.

Alternatively, is there another object that would be more appropriate?
Playground would be really useful just because it is in the menu, and
always available.

Cheers
Andy

Re: [Pharo-users] PharoJS Status

[Andy Burnett]

>>> Craig said
Hi All,

I'd like to start messing around with PharoJS.  Can anybody tell what
the status is?  (Stable, broken, etc.)

And, which Pharo version should I use for this?
<<<

I have just started playing with it. I have had some difficulty getting a
running image. Following the instructions - should - work, but I found that
I needed to install the NewExternalWebBrowser package separately before it
would run.
Cheers
Andy

Re: [Pharo-users] Ephemeric Cloud - new platform to publish Pharo web applications

[Andy Burnett]

Mike wrote

Thanks for pointing this out! When websocket support is ready on the
ephemeric gate I'll add a ping to API server so application will work
continuously without any effort. I think conceptually it should just work.

Also I plan to have a sticky-run option so you can mark some of ephemerics
not to go to sleep mode.

What do you think?


That sounds like a good approach. Just to dig into this a bit more, here is
our first use case.

We have an iPhone/web app which is a multiuser countdown timer. The data
are hosted on Firebase.  The iPhone app can set the time, and control
start/pause. The web apps count down by themselves, but the
start/stop/reset signalling is done in real time by the Firebase server.

So, if you imagine a timer that is set to run for 45 minutes, we would need
to signal start to the image. That would be reflected to all connected
clients via wss, and then, for example, stopped with 5 minutes to go.

We would need the app to remain live whilst a timer was running. However,
we don't use the timers all the time, so keeping the whole app live might
burn up more of the server's resources than necessary.

Cheers
Andy

Re: [Pharo-users] Ephemeric Cloud - new platform to publish Pharo web applications

[Andy Burnett]

Mike, that sounds really interesting.  Will the instances support websocket
connections, and if so, will that stop them from sleeping, i.e. if I had an
app that sent out news updates via wss every 15 minutes to any listening
clients, could it just continue to run, or does it have to receive a
get/post request every 30 mins?

Cheers
Andy

Re: [Pharo-users] Pharo-users Digest, Vol 27, Issue 62

[Andy Burnett]

The main thing I am wondering about is how to build portable interfaces. 

My ideal situation would be to use something like Spec to prototype within 
Pharo, and then generate something similar in JS. 

Alternatively, perhaps we could create mock objects for something like 
jquery-ui.

Noury, have you done any experiments with this?

Cheers
Andy

Re: [Pharo-users] PharoJS

[Andy Burnett]

Hi Noury,

Thanks for the link to the documentation. I have managed to get up and
running now - very cool!

One question. When I execute 1+1 on the Pharo (pink) playground, I see the
code appearing in the web browser log, but it doesn't appear to execute.
Is it supposed to, or at this stage is it just showing that it made it over
to the web browser?

Cheers
Andy

Re: [Pharo-users] PharoJS

[Andy Burnett]

Hi guys,
It is a project from Noury - at the Mines school. Just do a google for Noury 
and PharoJs

I found out about it from Torsten's blog - always worth reading :-)

AIUI, what it does is convert Pharo code - in the fly - to JavaScript. 

I can't say much more because I haven't got it to run. However, it is on small 
talk hub, so ease give it a go. 

[Pharo-users] PharoJS

[Andy Burnett]

Is anyone experimenting with PharoJS?

I managed to get the page with the core javascript functions to load - as
localhost - but I couldn't get any of the actions in the workspace to have
any effect on the web browser console.

Has anyone had any success?

Cheers
Andy

[Pharo-users] Can we have NeoCSV, and NeoJSON included in the base image?

[Andy Burnett]

I would find it really useful to have some more classes included in the base 
image. The Neo system would be particularly useful, but I would also find an 
XML reader valuable.

What is the process for deciding which classes get included by default?

Cheers
Andy

Re: [Pharo-users] Can we have NeoCSV, and NeoJSON included in the base image?

[Andy Burnett]

Thanks Ben, and Cyril.

I liked Mariano's approach, and I will play with that. However, I think the
suggestion about using Moose may be exactly what I need.

I have been playing with Mathematica a lot lately, and I really appreciated
the fact that you got the kitchen sink with it.

What I was wondering - taking Cyril's comment into account - is whether
there is an argument for producing a kitchen sink image which contains the
stable versions of all the key tools.  Obviously, that requires some
discussion/analysis of what the key tools are, but it shouldn't be
impossible to do.

In the meantime, I am off to play with Moose :-)

Cheers
Andy

Re: [Pharo-users] Can we have NeoCSV, and NeoJSON included in the base image?

[Andy Burnett]

 Stephan Eggermont said:
 

 What is stopping you from adding a build 'Andy's Base Image' to the
 Pharo-Contribution CI?
 


Ignorance :-)

I had no idea such a thing was possible.  It sounds like the ideal
solution.  Is the process documented somewhere?

Cheers
Andy

Re: [Pharo-users] Using Google service discovery API's with Pharo Smalltalk by Richard J. Prinz

[Andy Burnett]

Sven wrote

I hadn't seen this posted on the mailing list, but this is really cool
stuff.

Using Google service discovery API's with Pharo Smalltalk by Richard J.
Prinz

http://www.min.at/prinz/?x=entry:entry150318-104537 
http://www.min.at/prinz/?x=entry:entry150318-104537;comments:1#comments



I totally agree with this.  I have played with the code, and started
writing some code which manipulates the Google services. It is really
powerful.

Also, Richard has developed a slick way of dealing with OAuth when running
a client app.  This is great!

Re: [Pharo-users] Problems evaluating message sends in run-time arrays

[Andy Burnett]

ᐧ
Sean P. DeNigris wrote


Andy Burnett wrote
 In both cases it evaluates to 'Color blue' rather than the Color object.

'Color blue' is the Color object you created and put in your array. It is
aColor object. It's print string is 'Color blue'. See Color#printOn: for
more info.



Ah, of course! I completely misunderstood what the inspector was telling me.
Thanks very much

[Pharo-users] Problems evaluating message sends in run-time arrays

[Andy Burnett]

I would like to create an array with a collection of colour values.

I tried both:

colorList := {Color blue}
and
colourList := {Color named: #blue.}.

In both cases it evaluates to 'Color blue' rather than the Color object.

What surprised me was that:

charList := {Character digitValue:35. Character digitValue:33.}.

Does evaluate to an array of two characters.  What is going on?

Cheers
Andy
ᐧ

Re: [Pharo-users] Building agents in Pharo

[Andy Burnett]

Kish wrote 

How about this:

http://www.wolframalpha.com/

Not really free form text but quite a bit keyword dependent. Closer to what
will make good sense on Pharo / every enterprise app also more contextual
based on what the app does.



Yup, totally agree. I have been playing with Mathematica a lot recently,
and there are a number of things I would love to see in Pharo.  The ability
to pull in data sets in computable form is really useful. Being able to say
something like Population London UK, and have the data returned as a
collection is great.  In theory we could do the same with e.g. DataWiki.

Cheers
Andy

Re: [Pharo-users] Building agents in Pharo

[Andy Burnett]

Stef wrote


You see this is what the color higlighting is doing.
You type and in parallel it is trying to colorize the text.
After I'm not sure that you need agents running all the time (reacting
to each characters you type).
I would be you I would
  - prototype a hierarchy of classes whose instances have a kind of
patterns to know if they should be kick in
  - at the end of each line, I would send the line to a list of such
agent and react

- then only then, I would consider to fork the behavior of the agents.
why? because when you can avoid concurrency this is simpler :)



Thanks, that sounds like a very good way forward. I will go and try to
understand the highlighting code.

Cheers
Andy

Re: [Pharo-users] Building agents in Pharo

[Andy Burnett]

Doru wrote

Hi Andy,

You can also just hook into GTSpotter. It already provides the
infrastructure for handling parallel search and lets you focus only on
specifying the search logic.

Cheers,
Doru



Brilliant!  I am very impressed with GTSpotter. In fact, I am impressed
with the whole GT suite.  I think I will build a first prototype with
Glamour and GTSpotter.

By the way, what really motivated me to do this experiment is the tools -
from the 90's - that were presented in this Story of Siri video.  If you
have the time, it is well worth watching.  Being able to build this sort of
capability into an environment like Pharo would be amazing

https://wit.ai/blog/2014/12/18/adam-keynote

Cheers
Andy

[Pharo-users] Building agents in Pharo

[Andy Burnett]

I am interested in building a system that uses co-operating agents to parse
events.

Is Pharo a suitable system for this? I ask because given that it is single
threaded, I wondered whether running multiple agents would present any sort
of problem. Has anyone got experience of building something like this? And,
if so, what did you use for your basic queue? Is there a suitable FIFO
style queue within Pharo?

Cheers
Andy

[Pharo-users] Has anyone tried compiling the Pharo VM into JS using Emscripten?

[Andy Burnett]

I just saw this implementation of SQLite as a JS system, via Emscripten,
and I was curious whether something similar would be even vaguely possible
for the VM.

Cheers
Andy
ᐧ

Re: [Pharo-users] Has anyone tried compiling the Pharo VM into JS using Emscripten?

[Andy Burnett]

 that prevents it from growing on a Mac?  This is the latest
 Pharo30 VM.  
 
 
 Thanks for helping me get to the bottom of this
 
 Paul
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Sven Van Caekenberghe-2 wrote
 Hi Paul,
 
 I think you must be doing something wrong with your class, the #do: is
 implemented as streaming over the record one by one, never holding
 more
 than one in memory.
 
 This is what I tried:
 
 'paul.csv' asFileReference writeStreamDo: [ :file|
 ZnBufferedWriteStream on: file do: [ :out |
 (NeoCSVWriter on: out) in: [ :writer |
   writer writeHeader: { #Number. #Color. #Integer. #Boolean}.
   1 to: 1e7 do: [ :each |
 writer nextPut: { each. #(Red Green Blue) atRandom. 1e6
 atRandom.
 #(true false) atRandom } ] ] ] ].
 
 This results in a 300Mb file:
 
 $ ls -lah paul.csv 
 -rw-r--r--@ 1 sven  staff   327M Nov 14 20:45 paul.csv
 $ wc paul.csv 
 1001 1001 342781577 paul.csv
 
 This is a selective read and collect (loads about 10K records):
 
 Array streamContents: [ :out |
 'paul.csv' asFileReference readStreamDo: [ :in |
 (NeoCSVReader on: (ZnBufferedReadStream on: in)) in: [ :reader |
   reader skipHeader; addIntegerField; addSymbolField;
 addIntegerField;
 addFieldConverter: [ :x | x = #true ].
   reader do: [ :each | each third  1000 ifTrue: [ out nextPut: each
 ]
 ] ] ] ].
 
 This worked fine on my MacBook Air, no memory problems. It takes a
 while
 to parse that much data, of course.
 
 Sven
 
 On 14 Nov 2014, at 19:08, Paul DeBruicker lt;
 
 pdebruic@
 
 gt; wrote:
 
 Hi -
 
 I'm processing a 9 GBs of CSV files (the biggest file is 220MB or
 so). 
 I'm not sure if its because of the size of the files or the code I've
 written to keep track of the domain objects I'm interested in, but
 I'm
 getting out of memory errors  crashes in Pharo 3 on Mac with the
 latest
 VM.  I haven't checked other vms.  
 
 I'm going to profile my own code and attempt to split the files
 manually
 for now to see what else it could be. 
 
 
 Right now I'm doing something similar to
 
|file reader|
file:= '/path/to/file/myfile.csv' asFileReference readStream.
reader: NeoCSVReader on: file
 
reader
recordClass: MyClass; 
skipHeader;
addField: #myField:;


 
reader do:[:eachRecord | self seeIfRecordIsInterestingAndIfSoKeepIt:
 eachRecord].
file close.
 
 
 
 Is there a facility in NeoCSVReader to read a file in batches (e.g.
 1000
 lines at a time) or an easy way to do that ?
 
 
 
 
 Thanks
 
 Paul
 
 
 
 
 
 --
 View this message in context:
 http://forum.world.st/running-out-of-memory-while-processing-a-220MB-csv-file-with-NeoCSVReader-tips-tp4790264p4790319.html
 Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.
 
 
 
 
 
 --
 View this message in context:
 http://forum.world.st/running-out-of-memory-while-processing-a-220MB-csv-file-with-NeoCSVReader-tips-tp4790264p4790328.html
 Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.
 
 
 
 
 
 --
 View this message in context: 
 http://forum.world.st/running-out-of-memory-while-processing-a-220MB-csv-file-with-NeoCSVReader-tips-tp4790264p4790341.html
 Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.
 
 
 
 
 --
 
 Message: 3
 Date: Sat, 15 Nov 2014 00:09:48 +0100
 From: Alain Rastoul alf.mmm@gmail.com
 To: pharo-users@lists.pharo.org
 Subject: Re: [Pharo-users] Has anyone tried compiling the Pharo VM
into JSusing Emscripten?
 Message-ID: m4623q$btk$1...@ger.gmane.org
 Content-Type: text/plain; charset=utf-8; format=flowed
 
 Hi Andy,
 
 If I understand your question, you want to remake Dan Ingall's lively 
 kernel ?
 :)
 http://lively-web.org/welcome.html
 
 Cheers,
 Alain
 
 
 Le 14/11/2014 22:31, Andy Burnett a ?crit :
 I just saw this implementation of SQLite as a JS system, via Emscripten,
 and I was curious whether something similar would be even vaguely
 possible for the VM.
 
 Cheers
 Andy
 ?
 
 
 
 
 
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 http://lists.pharo.org/mailman/listinfo/pharo-users_lists.pharo.org
 
 
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 End of Pharo-users Digest, Vol 19, Issue 53
 ***

Re: [Pharo-users] Is there a way to store workspace 'gists' in Pharo?

[Andy Burnett]

Stef said:

I usually create a method and a class.
because script do not compose well.

ᐧ



Thanks, that sounds interesting. And, just for clarity, do you mean that
you create a single class e.g. MyGists and then create methods for each of
your useful snippets? Or, is there a benefit in creating a class per gist?

Cheers

[Pharo-users] Is there a way to store workspace 'gists' in Pharo?

[Andy Burnett]

From time to time I write a workspace script that I would like to keep.
Obviously, I could save them to a file, but I was wondering if there was a
way of saving them in the image, and browsing them in some friendly way?

Cheers
Andy
ᐧ

Re: [Pharo-users] Is there a way to store workspace 'gists' in Pharo?

[Andy Burnett]

ᐧ
Doru said

If you work with Pharo 4, they should already be saved in a play-cache
folder.


Great, I shall go and experiment.

Cheers
Andy

Re: [Pharo-users] Is anyone interested in developing a package for Google's Data API?

[Andy Burnett]

ᐧ
Sven said


Hi Andy,

I think we have all the building blocks to do this (ZnClient from Zinc,
HTTPS from Zodiac, OAuth2 from Zinc-SSO, JSON from NeoJSON), so that is
good. But there are a large number of Google APIs (
https://developers.google.com/gdata/docs/directory), each of them
containing lots of functionality. There are deprecation warnings on some of
them. It is of course necessary to first fully familiarise oneself with
each of them and the application they connect to. When some basic calls
work, the next step would indeed be to make nice object models for each of
them.

Some people on this list have built these kinds of API before (like Sean's
Flicker Client). I also think that once one of them is done, others could
be implemented by many different people, like students.



Yup, I totally agree. We have most of the pieces, and we just need a
project to assemble them.  My suggestion is that we focus on the
Spreadsheet services first. This seems to be the most flexible/useful one.
Once that is working, we could develop the other packages.

So, would anyone like to take up this project?

Cheers
Andy

[Pharo-users] Is anyone interested in developing a package for Google's Data API?

[Andy Burnett]

I use Google's spreadsheet and word processor a lot. I would love to be
able to access the data through Pharo. I can envisage all sorts of
use-cases such as manipulating data collected through the spreadsheet
forms, through to generating slide shows by writing to their presentation
app.

The thing that has held me back is the lack of a package which presents
e.g. Spreadsheet as an object with a collection of methods.

There are libraries for Java/Python/etc., but nothing - that I am aware of
- for Pharo.  Would anyone be interested in developing one?  I could
certainly contribute some funds towards the effort, and others may be able
to do likewise.

Cheers
Andy
ᐧ

[Pharo-users] Strange colour reversal on the Spec site

[Andy Burnett]

Hello,

I am posting here, because I couldn't find a Spec specific list.
Two things:

   1. The colour scheme for all the code examples on the site seems to have
   gone very odd. The text is now a light blue/green on a white background.
   Almost completely illegible. Has someone changed a css file?
   2. I noticed in the news section that the license has changed to GPL,
   because of a disagreement with the direction of Pharo.  Could someone
   explain what the disagreement was, and whether this is something we should
   be concerned about?

Cheers
Andy
ᐧ

Re: [Pharo-users] Strange colour reversal on the Spec site

[Andy Burnett]

Steph,
Thanks very much for such a comprehensive answer. I shall look forward to 
hearing from the board. 

Cheers
Andy

Re: [Pharo-users] How do I get ZnClient to follow redirects from Google App Scripts

[Andy Burnett]

ᐧ
And then, as if by magic, the problem vanished!

I think the problem must have been something I was doing wrong at the
Google end.  Everything now works.

Thanks Sven

Re: [Pharo-users] How do I get ZnClient to follow redirects from Google App Scripts

[Andy Burnett]

ᐧ

 Hi Sven,

That sounds encouraging.

I am running Pharo 3.0, but I don't know how to get the release number of
Zinc. Is it stored in the class comments, or can I use monticello to get
the info?

I am not behind a proxy

By the way, using the ZnClient returns about 53K of text. The first chunk
of which is:

'
!DOCTYPE html
html lang=en
  head
  meta charset=utf-8
  meta content=width=300, initial-scale=1 name=viewport
  meta name=description content=Google Drive is a free way to keep your
files backed up and easy to reach from any phone, tablet, or computer.
Start with 15GB of Google storage – free.



 Hi Andy,

 Your URL actually does return '13' for me with Zinc following the redirect:



 So the question is why doesn't it work for you ?

 Which version of Pharo and/or Zinc are you using ?
 Are you behind a proxy ?

 Sven

 On 16 Aug 2014, at 16:55, Andy Burnett andy.burn...@knowinnovation.com
 wrote:

  Hello,
 
  Google Apps Scripts allows me to create a webapp function that returns
 json.  For security reasons the url to call the function returns a
 redirection. For example
 
  Curl
 https://script.google.com/macros/s/AKfycbyjVyXa9cYqYZg6kfSdiT8l6S0Q3LEzn6FvonoI1G1MzXeegrOB/exec
 
  Returns an html page with the redirection information, whereas
 
  curl -L
 https://script.google.com/macros/s/AKfycbyjVyXa9cYqYZg6kfSdiT8l6S0Q3LEzn6FvonoI1G1MzXeegrOB/exec
 
  Returns the json value  (currently 13)
 
  I tried to use ZnClient to do the same thing, and I thought that
 ZnClient automatically followed redirections, but when I inspect the value
 it seems to actually return a larger html page, rather than the json.  My
 Pharo code is:
 
  (ZnClient new) get: '
 https://script.google.com/macros/s/AKfycbyjVyXa9cYqYZg6kfSdiT8l6S0Q3LEzn6FvonoI1G1MzXeegrOB/exec
 '.
 
  Do I have to set any other options?
 
  Please Note: this is my first experiment with Google App Scripts, so it
 is very likely that the problem is with my script, rather than Pharo.
 However, the script does seem to be returning the correct value in the
 browser, so it might be some interaction between the two.
 
  Cheers
  Andy
  ?

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 ***

Re: [Pharo-users] Best/simplest way to read and write to a MySQL database

[Andy Burnett]

ᐧ
Thanks everyone, I shall try the DBXTalk approach. It seems as though it is
being actively developed.

As a side note, I think it would be great if Pharo could identify a 'main
stream' route for dealing with RDBMS. It would be similar to the way in
which Zinc is the main way to do http etc.

I wouldn't want to discourage anyone from doing interestng experiments,
it's just that a main stream route would help people to get going.

Cheers
Andy

[Pharo-users] Best/simplest way to read and write to a MySQL database

[Andy Burnett]

I need to write some agents that will process data in a MySQL database.
 They don't need to do anything particularly clever, and performance isn't
a huge issue.

I read the threads about Glorp and DBXTalk, and I was left feeling a bit
confused about the best approach.  Given that my needs are simple, what
would be the recommended way to interface with the database?

Cheers
Andy
ᐧ

Re: [Pharo-users] Is there any fundamental technical barrier to compiling to JVM byte codes?

[Andy Burnett]

From: St?phane Ducasse stephane.duca...@inria.fr

The fun is important.
What we want is well designed and powerful libraries that enabled people.
For the JVM question: it is a question of resources + the fact that jvm do
not really support well some key smalltalk operations.
Now I do not understand why people develop their own vm instead of joining
forces.
Doing in the long term something and finishing a task are the most
difficult things.
Stef
ᐧ


Thank you to everyone for your comments. I am replying to Stephane's email,
just as a catch all.

I am curious to know more about the limitations in the JVM. My thinking was
sparked - in part - by Mark Roos's work on RTalk. I realised, after my
post, that he had actually worked the other way around, i.e. I think he
built a Digitalk bytecode layer on top of the JVM, rather than compiling to
JVM bytecodes.

Either way, what I was vaguely wondering about was how difficult it would
be to have a 'compile to JVM' option in Pharo. I could probably live -
quite happily - developing in 'real' Pharo, and then deploying an app to
e.g. Google App Engine, as a compiled Jar. Obviously, it would be much
better to retain all the dynamism of a true Smalltalk environment even when
the app has been deployed, but it it gave simple hosting, and scaling, it
might be a reasonable trade off.

I agree with Stephane, it would be great for people to join forces around a
vm. Would make like so much easier.

Cheers
Andy

[Pharo-users] Is there any fundamental technical barrier to compiling to JVM byte codes?

[Andy Burnett]

I am sure it would be a huge amount of work, and may not be a good idea at all.

However, given the number of dynamic languages that now compile to JVM
byte codes, I am curious whether there is anything about Pharo that
would make this impossible?

Cheers
Andy

[Pharo-users] PharoLauncher as the default Pharo download

[Andy Burnett]

ᐧ
That is a good question. I have to admit that I do use iTunes, and I have
often been annoyed by not being able to - easily - find the files.  I can
certainly see the value of presenting end users with simple interfaces, but
I am with Johan, I would like to be able to put my images somewhere more
obvious - to a developer - particularly because this would make
Dropbox/google drive synching easier.

Obviously, we can do all of this, but it has never been quite as obvious as
I would like it to be.

Cheers
Andy





 Just of curiosity, do you use iTunes, or organise music in directories by
 yourself? :)

 Uko

 On 20 Dec 2013, at 14:54, Johan Fabry jfa...@dcc.uchile.cl wrote:

 
  Sure. As I said before, I am old-school and double click on my images.
 So for me they are just documents, like any other, and I use the finder
 extensively for all my document manipulation stuff. I don't want to open a
 special tool to do the stuff I can do already in the finder. Also having
 megas and megas of images (which are just documents) in a hidden, black
 magic folder just makes my hairs stand on end, so I needed to communicate
 all those feelings.
 
  On Dec 20, 2013, at 10:46 AM, Yuriy Tymchuk yuriy.tymc...@me.com
 wrote:
 
  Yes, but this depends if you want to show image, changes, etc? file to
 users or not. For me it?s ok as far as I have enough tools to manipulate
 images
 
  Uko
 
  On 20 Dec 2013, at 14:40, Johan Fabry jfa...@dcc.uchile.cl wrote:
 
 
  Also, I think it is very wrong to keep the images in the Library
 folder by default. The Library is hidden and a black magic - do not
 touch area for the common user. A sensible default is the Documents folder.
 
  On Dec 20, 2013, at 6:44 AM, Damien Cassou damien.cas...@gmail.com
 wrote:
 
  Hi guys,
 
  what do you think about setting the PharoLauncher as the default
  download for mac os x users?
 
  If you never tried the launcher, please try it now:
 
  Mac OS X:
 https://ci.inria.fr/pharo-contribution/job/PharoLauncher-Mac-Package/lastSuccessfulBuild/artifact/pharo-ci/Pharo%203.0.0.dmg
  Ubuntu : https://launchpad.net/~pharo/+archive/stable
  Others: http://www.smalltalkhub.com/#!/~Pharo/PharoLauncher
 
  --
  Damien Cassou
  http://damiencassou.seasidehosting.st
 
  Success is the ability to go from one failure to another without
  losing enthusiasm.
  Winston Churchill
 
 
 
 
 
  --- Save our in-boxes! http://emailcharter.org ---
 
  Johan Fabry   -   http://pleiad.cl/~jfabry
  PLEIAD lab  -  Computer Science Department (DCC)  -  University of
 Chile
 
 
 
 
 
 
 
 
  --- Save our in-boxes! http://emailcharter.org ---
 
  Johan Fabry   -   http://pleiad.cl/~jfabry
  PLEIAD lab  -  Computer Science Department (DCC)  -  University of Chile
 
 




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 **

Re: [Pharo-users] Pyret: adding tests directly into classes

[Andy Burnett]

Doru said:

I stumbled across this idea when Markus Gaelli chose it as a PhD topic
about ten years ago (man, I'm old). The main idea was not to provide tests,
but examples that happened to have assertions. The goal was twofold: (1)
provide live documentation with real objects, (2) provide another way of
composing tests.

The project did not really come to fruition, but I still think this is
highly interesting topic. Part of the ideas were later implemented in
Phexample (http://www.smalltalkhub.com/#!/~Phexample/Phexample/) and
JExample (http://scg.unibe.ch/research/jexample).




That's really interesting. I had never heard of Phexample - so many
interesting projects, so little time! - I like the approach of building on
tests.  Do you know if this will work in Pharo 3?

Also, I may have misunderstood what Pyret was doing. Perhaps it is more
about examples.

Re: [Pharo-users] Pyret: adding tests directly into classes

[Andy Burnett]

Esteban said


Hi,

It does not really matters where you put the test.
What matters is to have the tools that show them properly, and we are going
in that direction. We already have ways to jump to tests in Nautilus, and
we will continue improving that to show them together (for example).
But I do not think the tests need to be *in* the class definition to have
same level of interoperation.

Esteban


I agree. The actual architecture doesn't matter. The critical factor is
making it as easy as possible to write/navigate tests. I didn't know about
the Nautilus features. I shall have to go and experiment.

Also, thinking about Doru's point. I wonder if we could write
tests/examples in the comments section of code. It might be an interesting
addition

Re: [Pharo-users] Halos in pharo 3

[Andy Burnett]

Sean said

Traditionally in Squeak, you could cycle through Morphs in either
direction -
from the topmost (e.g. a TextMorph in the Window) which is Alt-Shift-click
on Mac, or bottom most parent (e.g. from the Window) which on Mac is
Alt-click. Some people found the non-Shift version troublesome because they
accidentally brought up halos.

So in Pharo by default, you can Alt-click. You can also re-enable the
Alt-Shift-click direction via the settings browser: (World
Menu-System-Settings). Text search on halos and then enable Cycle both
directions

Thanks, that worked perfectly.

Cheers
Andy

[Pharo-users] Halos in pharo 3

[Andy Burnett]

I have two related questions:
1. how does one bring up halos in the 3.0 image. I tried Cmd + Shift + two
fingers (on my track pad), but nothing happens.

2. How does one get rid of the Pomodoro timers? I assumed I could use Halos
- see question 1 - but maybe there is a better way?

Cheers
Andy

Re: [Pharo-users] Does zinc support server sent events?

[Andy Burnett]

Sven said 

Assuming you mean http://en.wikipedia.org/wiki/Server-sent_events the
answer is no or not yet. It doesn't look very complicated though, given the
fact that Zinc WebSockets do already work. I will start by reading the
specs.



Sounds great! Please let me know if I can help in any way.

Cheers
Andy

[Pharo-users] Does zinc support server sent events?

[Andy Burnett]

I was wondering about using them instead of Websockets.

Cheers
Andy

Re: [Pharo-users] Configuring where ZnServer serves files from

[Andy Burnett]

This should work:

(ZnServer defaultOn: 1701)
logToTranscript;
delegate: ((ZnStaticFileServerDelegate new)
prefixFromString:
'apple/macosx';
directory:
'/Library/WebServer/Documents' asFileReference;
yourself);
start.

ZnClient new get: 'http://localhost:1701/apple/macosx/'.

If there is no index.html in the directory, you'll need to refer to an
actual file.



Thanks Sven, that's great!  And, I am glad I asked, because I wouldn't have
worked that out.

It seems to me that Zinc is becoming sufficiently powerful that it could do
with a section in the  collaboractive cookbook.  Could someone on this list
give me an account? I could start to capture bits and pieces.

cheers
Andy

[Pharo-users] Configuring where ZnServer serves files from

[Andy Burnett]

I needed to serve some (amber) files from a local host - it was just a
quick hack. I fired up the 2.0 one click image on my mac, and looked at the
instructions for running the server. I can see how it would work if I
installed it on Ubuntu, but I can't work out where my website's root folder
would be on the mac.  i tried the various folders inside the package, but
none worked.

Which brings me to the basic question, how do I configure the path for a
ZnServer - i am sure it is very simple, but I couldn't work it out.

Cheers
Andy