April 2011 - Pharo-users - lists.pharo.org

Re: [Pharo-users] More elegant way?

by Friedrich Dominicus

AxiNat <tibabenfortlapalanca(a)gmail.com> writes: > Hi Friederich, here's two simple optimizations: > > #(#nul #soh #stx #etx #eot #enq #ack #bel #bs #tab #lf) > Â Â withIndexDo: Â [:each :index | > Â Â Â self class compile: each asString , ' Â ^ asciiField at: ', index > asString.]. > > Array withAll: #(1 2 3) is equivalent toÂ #(1 2 3), and if you're not going to > use the array again, you don't even need to assign it to a variable :) Well I do not want the compile part with String > > Instead of manually using an index, it is more elegant to use > withIndexDo: Ok that is really nice to know Regards Friedrich -- Q-Software Solutions GmbH; Sitz: Bruchsal; Registergericht: Mannheim Registriernummer: HRB232138; Geschaeftsfuehrer: Friedrich Dominicus

April 1, 2011

Re: [Pharo-users] More elegant way?

by Norbert Hartl

Hi Friedrich, Am 31.03.2011 um 18:09 schrieb Friedrich Dominicus: > I've spend the better time of the afternoon with trying metaprogramming > with Smalltalk I finally have come up with: > > asciiNames := Array withAll: #(#nul #soh #stx #etx #eot #enq #ack #bel #bs #tab #lf). > i := 1. > asciiNames > do: [ :each | > self class compile: each asString , ' ^ asciiField at: ', i asString. > i := i + 1 ]. > > if you don't like string concatenation you may find this useful #(#nul #soh #stx #etx #eot #enq #ack #bel #bs #tab #lf) withIndexDo: [:each :index | self class compile: ('<1s><n><t>^ asciiField at: <2s>' expandMacrosWith: each with: index printString) classified: #(#accessing)] > which at least does what I want given names to ASCI Codes. Now > I have to admit I dislike this stuff with putting a string togehter and > run compile: on this string. > > I'm sure there is a more elegant way. Would you mind to lend me a hand? > > Yes and because I think I will need much more code generation in the > near future. Does you have nice Tutorial, Book whatever to do such kind > of jobs in Smalltalk I've quite a lot of books about Smalltalk but none > has this as theme... So it's really a bit hard to get into it.... Well, I think you have the perfect source for learning right in front of you. The code snippet above didn't come from my mind. I just remembered that if you are on a class you can open the menu, open 'Refactor Class' and select Accessors to have pharo generate getters and setters for you. So I wrote "Accessors" (with the double quotes) in the workspace selected it and did a string seach (shortcurt E). From the choice given 'ORCmdAccessorClassRefactoring' seemed to be the most feasible. Then I investigated the methods found some other reference and so on (I leave this as an exercise). Finally I found a snippet which I copied and altered for your needs. This way I learned something about OmniBrowser, Refactoring-Engine and that there is a method expandMacrosWith: :) I think this is the way to go. Often it is hard if you first have to think about a problem that you can solve. But you have a problem so with the very good searching capabilities of pharo you can find such things easily. Hope this helps, Norbert

April 1, 2011

Re: [Pharo-users] [OT] I've started blogging

by laurent laffont

On Thu, Mar 31, 2011 at 10:25 PM, Mariano Martinez Peck < marianopeck(a)gmail.com> wrote: > Hi guys. Just in case someone is interested, I've have started blogging: > "Sending messages through small talks" > > The blog is here: http://marianopeck.wordpress.com/ > > Any kind of feedback is more than welcome. > > I can't wait to learn !! Laurent. > Mariano >

April 1, 2011