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Reimplemented count(where:) #318

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May 13, 2024
Merged

Reimplemented count(where:) #318

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15 changes: 12 additions & 3 deletions Sources/Core/Extensions/Foundation/Collection+PovioKit.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -16,9 +16,18 @@ public extension Collection where Indices.Iterator.Element == Index {
}

public extension Collection {
/// Conditional element count - https://github.com/apple/swift-evolution/blob/master/proposals/0220-count-where.md
func count(where clause: (Element) -> Bool) -> Int {
lazy.filter(clause).count
/// Conditional element count - https://forums.swift.org/t/refresh-review-se-0220-count-where/66235/4
@inlinable
func count(
where predicate: (Element) throws -> Bool
) rethrows -> Int {
try reduce(0) { n, element in
if try predicate(element) {
n + 1
} else {
n
}
}
}
}

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