October 2021 - Pharo-users - lists.pharo.org

[ANN] Last Day for JRMPC Registration

by horrido.hobbies＠gmail.com

We only have 10 registrations. This is a major disappointment. Why the low turnout? We believe itâs because of the pandemic. High school students are tired and stressed out. The last thing theyâre thinking about is a programming competition. We will make the best of a bad situation. The competition will proceed as planned. Here is the Competition Format: [Competition Format â Object-Oriented (wordpress.com)](https://jrmpc2022.wordpress.com/2021/09/02/competition-form…) This event will be a lead-up to Camp Smalltalk Supreme next June. Both are part of the anniversary celebration of Smalltalk.

Oct. 31, 2021

Re: Strategies for (re)using HTTP client

by Sven Van Caekenberghe

Hi, > On 29 Oct 2021, at 15:42, Esteban Maringolo <emaringolo(a)gmail.com> wrote: > > Hi, > > I happened to me more than once that I have to create some REST service "client" in which I usually wrap an HTTP client inside (ZnClient in this case), and all the calls to the service, end up using the HTTP client, inside some mutex to serialize the execution. Yes, that is a good design. However, whether your REST client object wrapping a ZnClient is used by multiple concurrent threads is another decision. I would personally not do that. See further. > But I don't like that, in particular when some endpoints are better with streaming responses (large downloads) and I have to fiddle with the client and set it back to the settings before executing the request. You only can and should reuse connections to the same endpoint/service only, doing similar types of request/responses (let's say simple ones). A definitive danger point is authentication and authorization: different calls by different users might need different REST call settings, each time. Also, caching can be a problem, if user A can see / sees the cache of user B. > So, long story short... is it always safer to instantiate a new ZnClient on a per request basis since no state is shared, but I guess it is also less effective if I'm performing several requests to the same server. A new instance is definitely safer because it is cleaner. Reusing a connection is more efficient when doing multiple calls in (quick) succession. The penalty is usually pretty low, you can postpone optimising until there is an actual problem. Error handling and recovery are also harder in the reuse case (what state is the connection in ?). ZnClient does a form of automatic reconnection/retry though. > What are the recommended approaches here? > > > Esteban A. Maringolo HTH, Sven

Oct. 29, 2021

Strategies for (re)using HTTP client

by Esteban Maringolo

Hi, I happened to me more than once that I have to create some REST service "client" in which I usually wrap an HTTP client inside (ZnClient in this case), and all the calls to the service, end up using the HTTP client, inside some mutex to serialize the execution. But I don't like that, in particular when some endpoints are better with streaming responses (large downloads) and I have to fiddle with the client and set it back to the settings before executing the request. So, long story short... is it always safer to instantiate a new ZnClient on a per request basis since no state is shared, but I guess it is also less effective if I'm performing several requests to the same server. What are the recommended approaches here? Esteban A. Maringolo

Oct. 29, 2021

Can traits be removed programatically?

by Jupiter Jones

Does anyone know how to remove a trait programatically? Thanks in advance for any information. Cheers, J

Oct. 27, 2021

Re: How to indent block of text

by horrido.hobbies＠gmail.com

Thanks. I need to have this engraved on my forehead. Esteban Lorenzano wrote: > hi, > > the command is : ctrl+shift+(l or r) > Esteban > On Oct 23 2021, at 2:44 pm, horrido.hobbies(a)gmail.com wrote: > > > No. I meant this: https://stackoverflow.com/questions/13675260/how-to-indent-a-block-of-code-… > > > > Pierre Misse wrote: > > > > > Ctrl+maj+f applies the formatting, which is configurable IIRC. Is it what you're looking for? > > > On 10/22/2021 10:35 PM, horrido.hobbies(a)gmail.com wrote: > > > > > > > Has indenting text changed in Pharo? Ctrl-Alt-R and Ctrl-Alt-L donât work for me anymore. > > > > Thanks.

Oct. 23, 2021

Re: How to indent block of text

by Esteban Lorenzano

hi, the command is : ctrl+shift+(l or r) Esteban On Oct 23 2021, at 2:44 pm, horrido.hobbies(a)gmail.com wrote: > No. I meant this: https://stackoverflow.com/questions/13675260/how-to-indent-a-block-of-code-… > > > > Pierre Misse wrote: > > Ctrl+maj+f applies the formatting, which is configurable IIRC. Is it what you're looking for? > > On 10/22/2021 10:35 PM, horrido.hobbies(a)gmail.com wrote: > > > Has indenting text changed in Pharo? Ctrl-Alt-R and Ctrl-Alt-L donât work for me anymore. > > > Thanks.

Oct. 23, 2021

Re: How to indent block of text

by horrido.hobbies＠gmail.com

No. I meant this: https://stackoverflow.com/questions/13675260/how-to-indent-a-block-of-code-… Pierre Misse wrote: > Ctrl+maj+f applies the formatting, which is configurable IIRC. > Is it what you're looking for? > > On 10/22/2021 10:35 PM, horrido.hobbies(a)gmail.com wrote: > > > Has indenting text changed in Pharo? Ctrl-Alt-R and Ctrl-Alt-L donât > > work for me anymore. > > > > Thanks.

Oct. 23, 2021

Re: How to indent block of text

by Pierre Misse

Ctrl+maj+f applies the formatting, which is configurable IIRC. Is it what you're looking for? On 10/22/2021 10:35 PM, horrido.hobbies(a)gmail.com wrote: > > Has indenting text changed in Pharo? Ctrl-Alt-R and Ctrl-Alt-L donât > work for me anymore. > > Thanks. >

Oct. 23, 2021

How to indent block of text

by horrido.hobbies＠gmail.com

Has indenting text changed in Pharo? Ctrl-Alt-R and Ctrl-Alt-L donât work for me anymore. Thanks.

Oct. 22, 2021

Book the dates: Pharo Days 2021: 3/4 March 2022 @ Lille

by stephane ducasse

Dear Pharoers We are super excited to announce the dates of the next Pharo Days. Pharo Days 2021 will be held at Lille 3/4 March 2022 We will set soon a program and a website. Stay tuned. S.

Oct. 22, 2021