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dotWasim/CountWhere.swift

Created April 4, 2020 11:16
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add count(where:) to Sequence protocol
Raw
CountWhere.swift
extension Sequence {
func count(where predicate: (Element) throws -> Bool) rethrows -> Int {
try reduce(0) { try predicate($1) ? $0 + 1 : $0 }
}
}
let count = [1,23,4].count(where: { $0 > 2})
print(count)
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