Shortest code to create an array of random numbers in swift?

Question

I want to create an array of random numbers (Int, Int32)

I tried the following:

map(1...1000) { arc4random() } 

but it returns the following error:

error: type 'ClosedInterval<T>' does not conform to protocol 'SequenceType'

What am I doing wrong?

---

For some reason, minor tweaking of my first attempts seems to work just fine

map(1...1000) { $0 - $0 + arc4random() }

Now the problem is that I don’t understand why this customized work and why the initial approach is not ...

Any ideas?

Answer 1

Swift wants to infer types, but it can handle so much ambiguity until it surrenders.

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, , ClosedInterval SequenceType, , ... - Range ClosedInterval. Range, Swift - Range ClosedInterval. , , , , .

, $0 - $0, , :

let a  = map(1...100) { _ in arc4random() }

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