Lukas already answered very well. >From core designer point of view, the questions is what additionnal value is brought by #and:and:and: ? - does it add expressiveness against nested and: [and: [ and: [ ] ] ] ? Not much - does it shorten code ? No - does it enable some optimization ? No If it has no value, then we should better remove it and simplify the API.
Nicolas 2010/5/26 Igor Stasenko <[email protected]>: > On 26 May 2010 15:16, Stéphane Ducasse <[email protected]> wrote: >> In general (but it often does not work :)) having a lot of conditions in OOP >> means that you are missing class to dispatch on then. >> > Yup. Another argument to kill and:and:and: > It reminds me > isKindOf:orOf: > >>> But then which is the equivalence to #and:and:and: when I have many >>> conditions? >> >> a and: [b] and: [c] >> >> if a and c do not have side effect that may change the condition are >> equivalent >> to >> a and: [ b and: [c]] >> >> so you have express what you want >> >>> Perhaps I will say a stupidity... but , not is valid the implementation of >>> #&& and #|| messages instead of #and:... #or: .....? >> >> >> & and | are executing all their arguments while >> true & error -> error >> true and: [error] -> true but it is more costly >> >> >>> >>> ( aCondition1 && aCondition2 && aCondition3 ) ifTrue: [ <something> ] >>> >>> >>> Regards >>> -- >>> View this message in context: >>> http://forum.world.st/and-and-and-deprecated-on-1-1-why-tp2230786p2231486.html >>> Sent from the Pharo Smalltalk mailing list archive at Nabble.com. >>> >>> _______________________________________________ >>> Pharo-project mailing list >>> [email protected] >>> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project >> >> >> _______________________________________________ >> Pharo-project mailing list >> [email protected] >> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project >> > > > > -- > Best regards, > Igor Stasenko AKA sig. > > _______________________________________________ > Pharo-project mailing list > [email protected] > http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project _______________________________________________ Pharo-project mailing list [email protected] http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
