2014-05-22 21:11 GMT+02:00 sergio_101 <sergio....@gmail.com>: > great! looking at STON next! thanks! > > You can find it in the configuration browser
> > On Thu, May 22, 2014 at 2:26 PM, Clément Bera <bera.clem...@gmail.com>wrote: > >> Hello, >> >> I think you should look at the STON framework. STON looks like JSON for >> smalltalk objects. Basically it does the same as your idea but instead of a >> dictionary it loads fields of an objects from a STON file which looks like >> a JSON file (a STON is kind of an extended Dictionary exported as a string, >> but it has support for more that instance variables). >> >> Now if you want to go your way, to me what you want to do looks fine. >> These methods can be used for development tools but also for frameworks and >> stuff like that. The thing to do it is to add this method in Object and add >> support so it can work on all objects in the system. >> >> Object>>#intializeWithDictionary: aDictionary >> self class isVariable ifTrue: ["specific case ?"] >> self class isBytes ifTrue: ["specific case ?"] >> self class isCompiledMethod ifTrue: ["specific case ?"] >> self class isSmallInteger ifTrue: ["specific case"] >> aDictionary keysAndValuesDo: [ :key :value | >> self instVarNamed: key put: value ifAbsent: [ self error: 'no ', >> key , ' found']. >> >> But as you can see there are many specific cases: CompiledMethod, bytes >> objects, word objects, immediate objects, variable-sized objects, weak >> objects and for Pharo 4 even others that you may need to handle in your >> code (Ephemerons, 2bytes and 4 bytes objects). >> >> If you don't get the specific cases (you may not know programming >> language internals), then imagine how you would make your code work to >> initialize an Array, a ByteArray or a CompiledMethod from a dictionary. Not >> easy, huh ? >> >> That's why I strongly recommend to use something like STON, because it is >> very easy to use, handle already all the specific cases, well documented >> (Sven always does fancy documentation) and it will be maintained in Pharo 4 >> for recent changes (because Sven likes to use the bleeding edge version of >> Pharo). >> >> Regards, >> >> Clement >> >> >> 2014-05-22 19:37 GMT+02:00 sergio_101 <sergio....@gmail.com>: >> >> >>> is it possible to initialize a class with a dictionary? my first thought >>> would be to create a method like: >>> >>> intializeWithDictionary: aDictionary >>> >>> then, loop through the elements and do something like: >>> >>> instVarNamed: key put: value >>> >>> but the book says: >>> >>> Caveat: Although these methods are useful for building development >>> tools, using them to develop conventional applications is a bad idea: these >>> reflective methods break the encapsulation boundary of your objects and can >>> there- fore make your code much harder to understand and maintain.-- >>> >>> should i avoid this? >>> >>> >>> ---- >>> peace, >>> sergio >>> photographer, journalist, visionary >>> #BitMessage BM-2D8VWUJSS41RFKh1ec83preVabHrnniExa >>> >>> http://www.Village-Buzz.com >>> http://www.ThoseOptimizeGuys.com >>> http://www.CodingForHire.com >>> http://www.coffee-black.com >>> http://www.painlessfrugality.com >>> http://www.twitter.com/sergio_101 >>> http://www.facebook.com/sergio101 >>> >> >> > > > -- > ---- > peace, > sergio > photographer, journalist, visionary > #BitMessage BM-2D8VWUJSS41RFKh1ec83preVabHrnniExa > > http://www.Village-Buzz.com > http://www.ThoseOptimizeGuys.com > http://www.CodingForHire.com > http://www.coffee-black.com > http://www.painlessfrugality.com > http://www.twitter.com/sergio_101 > http://www.facebook.com/sergio101 >
