[Solved] pick an element in a dynamic array without repetition in Swift

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If you want to include 0*constant:

let arr = Array(0..<size).map { $0 * constant }

If you don’t want to (i.e., start at 1*constant):

let arr = Array(1..<size).map { $0 * constant }

If you don’t want to multiply by a constant (or the constant is 1):

let arr = Array(0..<size)

solved pick an element in a dynamic array without repetition in Swift