Swift filter array of strings

Question

I\'ve had troubles filtering array of keywords (strings) in swift ,My code:

self.filteredKeywords=filter(keywords.allValues, {(keyword:NSString) ->                    


        

Answer 1

[Updated for Swift 2.0]

As NSString is toll-free bridged to Swift String, just avoid the coercions with:

  3> ["abc", "bcd", "xyz"].filter() { nil != $0.rangeOfString("bc") }
$R1: [String] = 2 values {
  [0] = "abc"
  [1] = "bcd"
}

But, if you think allValues aren't strings:

(keywords.allValues as? [String]).filter() { nil != $0.rangeOfString("bc") }

which returns an optional array.