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#stdlib
- n
natpryce
06/22/2017, 1:22 PMthat way, JVM programmers can use the library with the Random type they know and love - n
natpryce
06/22/2017, 1:23 PMAnd JS programmers get a random number generator as part of the library’s API - m
mg6maciej
06/23/2017, 4:02 PM
after you add such extension in your codebase :)someArray.toUnmodifiableList()😆 1 - m
miha-x64
06/25/2017, 12:39 PM@User uploaded a file:toList()▾
- m
miha-x64
06/25/2017, 12:39 PM@louiscad it is ain't true. You can either cast it to
or mutate it from Java.MutableList - l
louiscad
06/25/2017, 12:52 PM@miha-x64 Of course, if you're making a library for third-parties that could hack it this way, you should create an extension for this - m
menegatti
06/26/2017, 9:35 AMI think #general/#getting-started might be better options - p
pavlospt
06/26/2017, 9:35 AMok will ask it there - d
dimsuz
06/27/2017, 11:20 AMhi! Is there a function in stdlib to "replace" value in a
in an "immutable" fashion? It would be ok to place it in the end. Something likeListCopy codelistOf(1,2,3,5).replace(2, 8) // => [1,3,5,8] (or ideally [1,8,3,5]) - d
dimsuz
06/27/2017, 11:20 AMi suspect there isn't, but who knows... 🙂 - m
menegatti
06/27/2017, 11:22 AMhow aboutlistOf(1,2,3,4).map { if (it == 2) 8 else it} - d
dimsuz
06/27/2017, 11:23 AMoh, right! 🙂 - t
thomasnield
06/27/2017, 7:28 PM@thomasnield has left the channel - n
nkiesel
06/28/2017, 5:53 AMwhy does
work butlistOf(true, null, false, true).filterNotNull().map { !it }
complains aboutlistOf(true, null, false, true).mapNotNull { !it }
Compiler should be smart enough to understand the lambda values areBoolean?
, no?Boolean - e
enleur
06/28/2017, 6:18 AMtry listOfNotNull, it does the same thing
the argument here ismapNotNull { !it }
so you have to check null explicitlyBoolean? - d
dmitry.petrov
06/28/2017, 6:50 AMCompiler should be smart enough to understand the lambda values are
No. Lambda in
, no?Boolean
takes list elements (which arelistOf(true, null, false, true).mapNotNull { !it }
). Meaning ofBoolean?
is not "skip null elements in the original container", but "skip null elements in the resulting container".mapNotNull - d
damian
06/28/2017, 1:39 PMYou could havelistOf(true, null, false, true).mapNotNull { it?.not() } - k
kirillrakhman
06/28/2017, 5:38 PMwhat's the best way iterate over all elements of a sequence except the last? - k
kirillrakhman
06/28/2017, 5:39 PM
seems so wasteful.toList().dropLast(1).forEach {} - o
orangy
06/28/2017, 5:49 PMHow do you know it’s last before you exhaust it? - o
orangy
06/28/2017, 5:51 PMYou may create a function that creates a wrapping sequence which have a one element look-ahead, and when you iterate, you always yield previous one. - k
kirillrakhman
06/28/2017, 6:01 PMI'm aware that a look-ahead is required - k
kirillrakhman
06/28/2017, 6:01 PMI was just wondering if there's en elegant way using stdlib - k
kirillrakhman
06/28/2017, 6:06 PMI'll probably usebuildSequence - a
andrewoma
06/29/2017, 12:24 AMI was going to suggest
then was surprised to find it's a Guava thing and not standardPeekingIterator - p
pavlospt
06/29/2017, 10:43 AMis there a reason that there is no:
? One could say that why do this when you can check it with anfoo?.let { ... } else { ... }
, but on the other hand the first seems prettier in most case and makes more sense. Anyone has any insights on this?if(...) { ... } else { ... } - m
menegatti
06/29/2017, 10:44 AMfoo?.let { ... } ?: ... - m
menegatti
06/29/2017, 10:44 AMthe elvis operator works as your else in this scenario - u
uhe
06/29/2017, 12:01 PMI think abusing
to avoid?.let { ... } ?: ...
is a smellif else - u
uhe
06/29/2017, 12:02 PMbecause
may returnletnull➕ 2👍 2