- Pharo-users - lists.pharo.org

Re: [Pharo-users] When to use a stream for concatenating text..

by Ben Coman

There are a few things floating around the web saying that it is faster using a stream for concatenation, but its been shown a while back to be "not necessarily" true. It depends on the use case so you should profile - if its that important. cheers -ben On Wed, Mar 11, 2015 at 2:09 AM, sergio_101 <sergio.rrd(a)gmail.com> wrote: > > it seems that in more cases than not, i find that developers use a stream > when concatenating some text strings. > > I am wondering if this is a smalltalk thing, or is there a real speed > benefit when using streams in this way. > > Thanks! > >

March 10, 2015

Re: [Pharo-users] GTTools and Mongo

by Torsten Bergmann

I spend some more minutes. So using GTTools in Pharo 4beta and a few more methods, pragmas, icons later we now have: MongoBrowser open which I also made available in the Tools menu. If you want to try out go to "Tools" -> "ConfigurationBrowser" and load MongoTalk in Pharo 4beta. See attached screenshot. This makes: 3 methods as class extensions for a custom GT inspector on each mongo domain object (mongo, database, collection) 4 methods to provide the 4 icons 1 method to provide the pragma for inclusion into world menu (#menuCommandOn:) 1 method to open which makes 9 methods to build a Mongo database UI browser in Pharo Smalltalk! Without the icons and menu item only 4 !!! Hey - Pharo rocks already and with GTTools we get even more empowered! Thanks to anyone who contributed to MongoTalk (especially Kent Beck for the initial implementation). Have fun T.

March 10, 2015

Re: [Pharo-users] When to use a stream for concatenating text..

by sergio_101

gotcha.. this makes sense. On Tue, Mar 10, 2015 at 2:18 PM Esteban A. Maringolo <emaringolo(a)gmail.com> wrote: > 2015-03-10 15:09 GMT-03:00 sergio_101 <sergio.rrd(a)gmail.com>: > > > > it seems that in more cases than not, i find that developers use a stream > > when concatenating some text strings. > > > > I am wondering if this is a smalltalk thing, or is there a real speed > > benefit when using streams in this way. > > It is not a matter of speed only, but mostly memory. > > For large text concatenations Streams are more memory efficient > because you don't create intermediate strings. > > E.g. > 'string1', 'string2', 'string3' ... , "stringN" will require the > creation of N intermediate String instances. > > aStream > nextPutAll: 'string1'; > nextPutAll: 'string2'; > nextPutAll: 'string3'; > nextPutAll: 'stringN' > > Will only add contents to the Stream collection. > > > Esteban A. Maringolo > >

March 10, 2015

Re: [Pharo-users] When to use a stream for concatenating text..

by Esteban A. Maringolo

2015-03-10 15:09 GMT-03:00 sergio_101 <sergio.rrd(a)gmail.com>: > > it seems that in more cases than not, i find that developers use a stream > when concatenating some text strings. > > I am wondering if this is a smalltalk thing, or is there a real speed > benefit when using streams in this way. It is not a matter of speed only, but mostly memory. For large text concatenations Streams are more memory efficient because you don't create intermediate strings. E.g. 'string1', 'string2', 'string3' ... , "stringN" will require the creation of N intermediate String instances. aStream nextPutAll: 'string1'; nextPutAll: 'string2'; nextPutAll: 'string3'; nextPutAll: 'stringN' Will only add contents to the Stream collection. Esteban A. Maringolo

March 10, 2015

When to use a stream for concatenating text..

by sergio_101

it seems that in more cases than not, i find that developers use a stream when concatenating some text strings. I am wondering if this is a smalltalk thing, or is there a real speed benefit when using streams in this way. Thanks!

March 10, 2015

Re: [Pharo-users] Running startup scripts after the UI has finished

by Esteban Lorenzano

Smalltalk addDeferredStartupAction: aBlock. aBlock will be executed after startup, as the comment says: "Add the monadic or nulladic block to the list of actions that we will be performed immediately after the startup is totally executed.â and World defer: aBlock aBlock will be executed in the next UI rendering cycle, as the comment DOES NOT says (because is missing) ;) So I think the first one, or the two combined will give you the solution. cheers, Esteban > On 10 Mar 2015, at 18:36, Peter UhnÃ¡k <i.uhnak(a)gmail.com> wrote: > > Hi, > > is it possible to execute startup scripts after the UI has finished rendering / the image has loaded? > > I have install startup script that executes when I create the image, however since it starts executing very early the UI is frozen and I don't get any progress bar so I don't know what's happening (since I'm downloading Roassal and other libraries it can take quite a while.) > > Thanks, > Peter

March 10, 2015

Running startup scripts after the UI has finished

by Peter UhnÃ¡k

Hi, is it possible to execute startup scripts after the UI has finished rendering / the image has loaded? I have install startup script that executes when I create the image, however since it starts executing very early the UI is frozen and I don't get any progress bar so I don't know what's happening (since I'm downloading Roassal and other libraries it can take quite a while.) Thanks, Peter

March 10, 2015

Re: [Pharo-users] stdout on windows

by Esteban Lorenzano

AFAIK, GetStdHandle will answer NULL, as explained here: https://msdn.microsoft.com/en-us/library/windows/desktop/ms683231(v=vs.85).… <https://msdn.microsoft.com/en-us/library/windows/desktop/ms683231(v=vs.85).…> (Windows is not my speciality, so I can be wrongâ¦ but AFAIK, Eliot also had to produce two executables for windows, because of this reason) Esteban > On 10 Mar 2015, at 18:02, Torsten Bergmann <astares(a)gmx.de> wrote: > > Esteban wrote: >> you cannot. >> and the reason is deeply inside the inners of the vm implementation and the windows architecture > > not true as to my knowledge even a windows app can get a handle to stdout (or set one) and this is not > dependent if you build it as consol or ui app. you can even create own consoles if you like, ... > > If I remember correctly from ST/MT and MSDN getting a handle to stdio means only to call "GetStdHandle" > with STD_OUTPUT_HANDLE. > > So the basic reason is that stdout support was not implemented for Windows because it is different > than Unix flavours and nobody seemed to care so far. Therefore Pharo on Windows uses a workaround (file) > instead of completing the handling for Windows. Maybe it was the lack of time or knowledge or that NB was not > ready yet. Dont know. > > I already have some initial support for consoles and reading/writing to it in the OSWindows project > that could be loaded from config browser. This could be a base. > > So it is possible but as ever ... time and resources. > > Bye > T. > >

March 10, 2015

stdout on windows

by Torsten Bergmann

Esteban wrote: >you cannot. >and the reason is deeply inside the inners of the vm implementation and the windows architecture not true as to my knowledge even a windows app can get a handle to stdout (or set one) and this is not dependent if you build it as consol or ui app. you can even create own consoles if you like, ... If I remember correctly from ST/MT and MSDN getting a handle to stdio means only to call "GetStdHandle" with STD_OUTPUT_HANDLE. So the basic reason is that stdout support was not implemented for Windows because it is different than Unix flavours and nobody seemed to care so far. Therefore Pharo on Windows uses a workaround (file) instead of completing the handling for Windows. Maybe it was the lack of time or knowledge or that NB was not ready yet. Dont know. I already have some initial support for consoles and reading/writing to it in the OSWindows project that could be loaded from config browser. This could be a base. So it is possible but as ever ... time and resources. Bye T.

March 10, 2015

Re: [Pharo-users] Any framework to create a blog over seaside?

by Julien Delplanque

On 10/03/15 17:28, Stephan Eggermont wrote: > On 10/03/15 16:12, Julien Delplanque wrote: >> On 09/03/15 21:56, stepharo wrote: >>> If you take pier you get a blog out of the box >> It's no longer maintained isn't it? > > What do you mean? Diego posted on how to make a > Bootstrap based one. Oh ok sorry it was a misunderstanding. Thanks you all!

March 10, 2015