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simplify

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This commit is contained in:
Sami Samhuri 2015-12-21 20:30:36 -08:00
parent 543ac54165
commit 7012b60ebb
1 changed files with 6 additions and 6 deletions
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12
Sources/CollectionType.swift
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@ -26,13 +26,13 @@ public extension CollectionType {
public extension CollectionType where Index: RandomAccessIndexType {
/// Returns a random element, or nil if the collection is empty
/// Returns a random element, or nil if the collection is empty.
func sample() -> Generator.Element? {
guard !isEmpty else {
return nil
}
let n = Int(count.toIntMax())
let i = startIndex.advancedBy(Index.Distance(IntMax(randomInt(n) - 1)))
let n = randomInt(Int(count.toIntMax()))
let i = startIndex.advancedBy(Index.Distance(IntMax(n)))
return self[i]
}
@ -44,11 +44,11 @@ public extension CollectionType where Generator.Element: Equatable {
/// identical elements.
func unique() -> [Generator.Element] {
var last: Generator.Element?
return filter({ item -> Bool in
let isUnique: Bool = last == nil || last != item
return filter { item in
let isUnique = last == nil || last != item
last = item
return isUnique
})
}
}
}