Created
May 19, 2020 19:48
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| var numbers = Array(1...15) | |
| // Find the indices of all the even numbers | |
| let indicesOfEvens = numbers.subranges(where: { $0.isMultiple(of: 2) }) | |
| // Perform an operation with just the even numbers | |
| let sumOfEvens = numbers[indicesOfEvens].reduce(0, +) | |
| // sumOfEvens == 56 | |
| // You can gather the even numbers at the beginning | |
| let rangeOfEvens = numbers.moveSubranges(indicesOfEvens, to: numbers.startIndex) | |
| // numbers == [2, 4, 6, 8, 10, 12, 14, 1, 3, 5, 7, 9, 11, 13, 15] | |
| // numbers[rangeOfEvens] == [2, 4, 6, 8, 10, 12, 14] |
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