functional programming - What is the Swift equivalent of C#/.NET/LINQ's Enumerable.All method? -

i want function applies given function sequence , returns true iff given function returns true every element of sequence, enumerable.all c#/.net/linq world.

there isn't built-in function this, can add own protocol extension method:

extension sequencetype {     func all(@noescape predicate: (self.generator.element) throws -> bool)         rethrows -> bool {          in self {             if !(try predicate(i)) { return false }         }         return true     } } 

and use on sequence like:

let allpositive = [1, 2, 3].all { $0 > 0 }