RE: [Pharo-users] Block evaluation with n+1 arguments

Excellent write up, Stephane!

I will add that over the years, there have been many times (countless!) when developing/debugging involved a complex block and that turned out to be significant nuisance.

I can elaborate on the details, but once a block gets passed around, revising it on the fly breaks debug and continue.

Having a block comprise a single message send allows one to revise that method as and when needed.

 

 

From: [email protected] <[email protected]> On Behalf Of [email protected]
Sent: April 10, 2023 07:03
To: Any question about pharo is welcome <[email protected]>
Cc: [email protected]
Subject: Re: [vwnc] [Pharo-users] Block evaluation with n+1 arguments

 

BTW to me when a block needs too many arguments it feels like that an object has to be born :)

With an object I can just sent or not a given extra argument. 

 

Now I do not know enough your specific context but what I learned is that complex blocks are difficult to follow, manipulate…

so I keep block as simple as possible and else I create little objects.

 

 

This is a little lectures from a super cool forthcoming mooc

 

                https://urldefense.com/v3/__https://rmod-files.lille.inria.fr/DesignCoffeeClub/ForLearningLab/7-Lang-04-BlocksVsObjects.pdf__;!!DZ3fjg!463LXMsEoOSzarVYAtND6R0r67IFvqHMylPFd1mzLkiEjT3FWcaVY-sIrMQCYizwHW6M7Qd66vTU-56ij3WubyTb_spk$  <https://urldefense.com/v3/__https:/rmod-files.lille.inria.fr/DesignCoffeeClub/ForLearningLab/7-Lang-04-BlocksVsObjects.pdf__;!!DZ3fjg!7bRnSLpPY1OiW_EoNtvSDBVMfYN5owvLQjTs_FdNbynPLMw7hmdZCNifkawlO9Hz-NbVkGnnh37u3XIaEJEAHjFBHHppJxSeBgY$> 

 

 





On 6 Apr 2023, at 15:28, Steffen Märcker <[email protected] <mailto:[email protected]> > wrote:

 

Hi!

I want to evaluate a block an argument 'arg1' and additional n arguments
given in an array 'args'. The following code does the trick:

  block valueWithArguments: (Array with: arg1) , args.

Is there a way to do this without the overhead of creating a new Array?
(How) Can I add additional #value:value:[...] methods to BlockClosure that
evaluate the block with n arguments directly without falling back to
#valueWithArguments: ? If yes, what's the maximum?

Cheers!
Steffen