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#stdlib
- o
orangy
12/22/2016, 9:39 PMBut you can’t? - m
michaelrocks
12/22/2016, 9:39 PMYou can but you will suffer if you make some changes to the code so that
will always fail. The compiler won’t tell you about that.cast - o
orangy
12/22/2016, 9:40 PMWell, so that’s a good reason to not introduce such a function to stdlib? - m
michaelrocks
12/22/2016, 9:40 PMlist.first().cast<Something>().let { actionOn(it) } - m
michaelrocks
12/22/2016, 9:42 PMI’m pretty sure you can add such a function so that it will be checked at compile time. - m
michaelrocks
12/22/2016, 9:42 PMUnfortunately, we don’t have such tools. - o
orangy
12/22/2016, 9:42 PMbasically, stdlib is just that, a library - m
michaelrocks
12/22/2016, 9:43 PMMaybe I just use wong terminology and call stdlib something that is not really stdlib. But you definitely have some stuff that developers just cannot define in libraries. - j
jw
12/22/2016, 9:44 PMan intrinsic? - m
michaelrocks
12/22/2016, 9:44 PMYep - m
michaelrocks
12/22/2016, 9:46 PMSeems they belong to runtime, not stdlib. - o
orangy
12/22/2016, 9:47 PMI don’t know, there seems to be some obsession with one-liners. - o
orangy
12/22/2016, 9:47 PMwhat’s particularly wrong withCopy codeval something = list.first() as Something actionOn(something) - j
jw
12/22/2016, 9:48 PMi don't think you (Kotlin) can claim that you haven't helped fuel the one-liner desire - j
jw
12/22/2016, 9:49 PMthere's so many useful things! - m
michaelrocks
12/22/2016, 9:50 PMIn this particular case adding an additional variable is pretty fine. But in some call chains it may be less convenient. - m
michaelrocks
12/22/2016, 9:51 PMIn our project we have 119 usages of
and 82 usages ofcastcastOptional - o
orangy
12/22/2016, 9:52 PM@jw I know… it’s sometimes so sweet to write it all in one line 🙂 - o
orangy
12/22/2016, 9:54 PMI was trying to solve advent of code 2016 puzzles with one-liners, sometimes successful, sometimes not - o
orangy
12/22/2016, 9:54 PManyway, they are incomprehensible - v
voddan
12/23/2016, 5:59 AMIMO casts should be extra visible when reading code. That's why having
is something desirable. If anything, we should add an intention to add parenthesises when needed:(boo.foo as Int).qoo.zooboo.foo as Int.<caret> - t
treelzebub
12/23/2016, 5:56 PMis there a reason why
exists, butList.toMutableList()
does not?Map.toHashMap() - t
treelzebub
12/23/2016, 5:57 PMlike… should i not put this in my codebase?fun <K, V> Map<K, V>.toHashMap() = hashMapOf<K, V>().apply { putAll(this@toHashMap) } - j
jw
12/23/2016, 6:00 PMyou should use
instead since it will pre-size the underlying structureHashMap(this) - t
treelzebub
12/23/2016, 6:00 PMah, thanks. i knew it was ugly, but i didn’t know it wasn’t as performant as it could be. thanks 🙂 - j
jw
12/23/2016, 6:00 PMalso shouldn't that be called
?toMutableMap() - j
jw
12/23/2016, 6:01 PM - j
jw
12/23/2016, 6:01 PMadded in 1.1-M02 apparently - t
treelzebub
12/23/2016, 6:01 PM👍 yay! - v
voddan
01/03/2017, 8:19 AMWhat is the status of https://youtrack.jetbrains.com/issue/KT-7180?