Welcome!
This Swift template gives an example of using Collections
// Collecitons
/*#################################*/
// Create an array of all odd squares of 1-20 using map and filter
let oneToTen = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20]
var oddSquares = oneToTen.map { $0 * $0 }.filter { $0 % 2 != 0 }
print(oddSquares)
Advanced usage
If you want a more complex example (external libraries, viewers...), use the Advanced Swift template
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