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| author | Allan Wang <me@allanwang.ca> | 2018-04-07 20:23:41 -0400 |
|---|---|---|
| committer | Allan Wang <me@allanwang.ca> | 2018-04-07 20:23:41 -0400 |
| commit | b85fc4f939a443368cea296bfa8439745419d887 (patch) | |
| tree | c9049a69127ea0bd6b43f07bcbe5822145360f2a /core/src/main/kotlin | |
| parent | a0377be622f21b4c6a7d8828505c1e95efab1254 (diff) | |
| download | kau-b85fc4f939a443368cea296bfa8439745419d887.tar.gz kau-b85fc4f939a443368cea296bfa8439745419d887.tar.bz2 kau-b85fc4f939a443368cea296bfa8439745419d887.zip | |
Add iterator firstOrNull
Diffstat (limited to 'core/src/main/kotlin')
| -rw-r--r-- | core/src/main/kotlin/ca/allanwang/kau/kotlin/Streams.kt | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/core/src/main/kotlin/ca/allanwang/kau/kotlin/Streams.kt b/core/src/main/kotlin/ca/allanwang/kau/kotlin/Streams.kt index 0da6d7a..303153f 100644 --- a/core/src/main/kotlin/ca/allanwang/kau/kotlin/Streams.kt +++ b/core/src/main/kotlin/ca/allanwang/kau/kotlin/Streams.kt @@ -15,4 +15,16 @@ inline fun <T, C : MutableIterable<T>> C.kauRemoveIf(filter: (item: T) -> Boolea while (iter.hasNext()) if (filter(iter.next())) iter.remove() return this +} + +/** + * Returns the first element tha matches the predicate, + * or null if no match is found + */ +inline fun <T : Any> Iterator<T>.firstOrNull(predicate: (T) -> Boolean): T? { + while (hasNext()) { + val data = next() + if (predicate(data)) return data + } + return null }
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