Created
August 23, 2020 06:17
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| let cast = ["Vivien", "Marlon", "Kim", "Karl"] | |
| let lowercaseNames = cast.map { $0.lowercased() } | |
| // 'lowercaseNames' == ["vivien", "marlon", "kim", "karl"] | |
| let letterCounts = cast.map { $0.count } | |
| // 'letterCounts' == [6, 6, 3, 4] |
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