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#announcements
- m
mpcjanssen
03/29/2016, 11:55 AMit's funny that the amount of duplication is completely gone too:
vsfun methodsInJoinPoint(joinpoint: Joinpoint)
count the number of JoinPointsfun JointPoint.methods() - j
jasper
03/29/2016, 11:55 AMi think a few people have raaised the same - j
jasper
03/29/2016, 11:56 AM. . . folks who are used to mix-ins, etc in dynamically dispatched languages - j
jasper
03/29/2016, 11:56 AMbut after understanding that they’re awesome - k
kirillrakhman
03/29/2016, 11:56 AMif you keep in mind that they are compiled to static methods that's not a problem - k
kirillrakhman
03/29/2016, 11:57 AMit's helpful to know a bit about the underlying VM - j
jasper
03/29/2016, 11:57 AMindeed. . . have worked plenty with Spring, hibernate, etc in the past - j
jasper
03/29/2016, 11:58 AMtheir runtime features usually lead to some VM intimacy - j
jasper
03/29/2016, 11:58 AM“how is a method instrumented?” etc - j
jasper
03/29/2016, 11:59 AM(whether you love them or not) - j
jasper
03/29/2016, 12:09 PMspeaking of which - i like to name my extension functions using ObjC style: - j
jasper
03/29/2016, 12:09 PMexample:URL+PathComponents.kt - j
jasper
03/29/2016, 12:10 PMok idea? i think so - y
yole
03/29/2016, 12:13 PMif you ever call these functions from Java, you’ll most likely need to specify a @JvmName annotation to get a meaningful name for your class - j
jasper
03/29/2016, 12:18 PMoops. i mean I name the files like:
. The function is justURL+PathComponents.ktURL.lastPathComponent() - j
jasper
03/29/2016, 12:19 PMnoted about @JVMName - y
yole
03/29/2016, 12:19 PMyes, sure. the name of the class containing the functions is generated from the name of the file - j
jasper
03/29/2016, 12:19 PMoh, i see. understood. - r
romaric
03/29/2016, 12:23 PMif_statement_vs_when_statement.kt - d
dimitar_
03/29/2016, 12:24 PMWhat about .let in this case? y?.let { println(“cat”) } ?: println(“Bird”) - r
romaric
03/29/2016, 12:26 PMyes forget the example sorry - r
romaric
03/29/2016, 12:26 PMimagine that I have multiple condition - d
dalexander
03/29/2016, 12:26 PMI wouldn’t be concerned about performance unless there’s a reason to believe that it will be a problem— If you have a huge if/else chain then there’s a decent chance that
will be better,when
would also be more readable.when - r
romaric
03/29/2016, 12:31 PMok dalexander , is there performance penalty using "when” instead of “if/else if/else” for small piece of statements ? - d
dalexander
03/29/2016, 12:31 PMI’m not sure, I would have to look at what the bytecode output, someone else in this channel might know more. - r
romaric
03/29/2016, 12:37 PMbecause I would like to find an efficient way to replace these heavy if statements from my recycler view adapter (android). - d
dmitry.petrov
03/29/2016, 12:39 PMThere are some cases when 'when' can be faster than 'if' - d
dmitry.petrov
03/29/2016, 12:43 PMWhens by integral constants, string constants, and enums are generated as ...SWITCH instructions. - d
dmitry.petrov
03/29/2016, 12:45 PMOtherwise, 'when' and 'if' are interchangeable. - r
romaric
03/29/2016, 12:46 PMoh well, this is clear