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Start your free trialEnid Tian
7,832 PointsThe Bummer! shows "Try and use a trailing closure for your closure expression" while I did wrote one. Anything wrong?
[1,2,3,4].map({(i:Int) -> Int in return i*2}) [1,2,3,4].map({i in return i*2}) [1,2,3,4].map({i in i*2}) [1,2,3,4].map({$0 * 2}) [1,2,3,4].map() {$0 * 2} [1,2,3,4].map{$0 * 2}
func doubleValue(i: Int) -> Int {
return i * 2
}
let doubler = doubleValue
let doubledValues = [1,2,3,4].map(doubler)
[1,2,3,4].map({(i:Int) -> Int in return i*2})
[1,2,3,4].map({i in return i*2})
[1,2,3,4].map({i in i*2})
[1,2,3,4].map({$0 * 2})
[1,2,3,4].map() {$0 * 2}
[1,2,3,4].map{$0 * 2}
1 Answer
David Papandrew
8,386 PointsYou have the correct answer in your code, the only issue is that the challenge wants you to replace the "doubleValue" function call in the doubledValues statement.
So just add the trailing closure in this manner and you will pass the challenge:
let doubledValues = [1,2,3,4].map { $0 * 2 }