2018-02-10 20:59 GMT+03:00 Stephane Ducasse <stepharo.s...@gmail.com>:
> Please to not use an unary on Symbol > Dispatch on something. > > self class environment at: #Array > is the best > We should not use collection API for reflection calls. It makes them very difficult to find. Let's use explicit names like: self class environment classNamed: #Array >From the other side we all agree that #asClass is super handy method. And we can fix it to respect sender environment using thisContext. It will affects performance but with our super powerful metalinks it can be easily cached (#asMethodConst is implemented that way). So we can make environment completely transparent for users. Best regards, Denis > For Modules, we made progress and got bitten by many issues and teaching > load. > > > Stef > > On Sat, Feb 10, 2018 at 4:50 PM, Clément Bera <bera.clem...@gmail.com> > wrote: > > On Sat, Feb 10, 2018 at 4:34 PM, Hernán Morales Durand > > <hernan.mora...@gmail.com> wrote: > >> > >> Hi Clément, > >> > >> First time I read about modules in Pharo. > >> What is a module exactly? > >> > >> What's the problem to solve? > > > > > > It's similar to namespaces with some different, arguably better, > features. > > > > Honestly I am not the expert on it so I would like some one else to > answer. > > > > Among other things, it solves the problem of having 2 classes with the > same > > name (avoiding the prefixes we have like in C). But reportedly that's > just a > > side-effect and not the main problem to solve. > > > >> > >> Cheers, > >> > >> Hernán > >> > >> 2018-02-10 9:47 GMT-03:00 Clément Bera <bera.clem...@gmail.com>: > >> > Hi, > >> > > >> > In short, everything that is not namespace/module compatible will be > >> > deprecated/changed/removed in the future, so it is not recommended to > >> > use > >> > it. > >> > > >> > a.2) #Array asClassInEnvironment: Smalltalk globals > >> > b.1) Smalltalk globals at: #Array > >> > => Ok-ish, note that you may need to change 'Smalltalk globals' the > >> > namespace/module when support for those will be added since Array will > >> > be in > >> > a module. > >> > Maybe you want instead to use instead: > >> > > >> > c) self class environment at: #Array > >> > => this will work in the future if your code is a class which > >> > environment/namespace/module includes the Array class you would expect > >> > > >> > a.1) #Array asClass > >> > b.2) Smalltalk at: #Array > >> > b.3) Smalltalk classNamed: #Array > >> > => In which namespace/module are you looking for #Array ? In the > future > >> > this > >> > may be removed, alternatively it will work only for globals but not > >> > globals > >> > inside namespace/module which won't work since Array will be in a > >> > module. > >> > > >> > > >> > On Sat, Feb 10, 2018 at 12:57 PM, Peter Uhnák <i.uh...@gmail.com> > wrote: > >> >> > >> >> Hi, > >> >> > >> >> what is the canonical way to get a class from a symbol? > >> >> > >> >> a) Converting symbol into class via string protocol > >> >> > >> >> a.1) #Array asClass > >> >> I use this the most, because it is easy, uses unary selector, and so > >> >> far > >> >> I've never ran into any issues. But apparently it is not good -- why? > >> >> > >> >> a.2) #Array asClassInEnvironment: Smalltalk globals > >> >> > >> >> b) Retriving the class by key from the system dictionary > >> >> > >> >> b.1) Smalltalk globals at: #Array > >> >> > >> >> b.2) Smalltalk at: #Array > >> >> > >> >> b.3) Smalltalk classNamed: #Array > >> >> > >> >> c) something else entirely? > >> >> > >> >> I get that using #asClass wouldn't work if there was a different > >> >> environment, however I don't even know in what situation there could > be > >> >> a > >> >> different environment, so I cannot assert how problematic it is or > >> >> isn't. > >> >> > >> >> Thanks, > >> >> Peter > >> > > >> > > >> > > >> > > >> > -- > >> > Clément Béra > >> > Pharo consortium engineer > >> > https://clementbera.wordpress.com/ > >> > Bâtiment B 40, avenue Halley 59650 Villeneuve d'Ascq > >> > > > > > > > > -- > > Clément Béra > > Pharo consortium engineer > > https://clementbera.wordpress.com/ > > Bâtiment B 40, avenue Halley 59650 Villeneuve d'Ascq > >
