Swift ↓ちゃんとできてるなぁ。
var a = [2, 3, 5] var b = a a.withUnsafeMutableBufferPointer { $0.baseAddress!.pointee = -1 } print(a) // [-1, 3, 5] print(b) // [2, 3, 5]
var a = [2, 3, 5] var b = a a.withUnsafeBufferPointer { UnsafeMutablePointer(mutating: $0.baseAddress!).pointee = -1 } print(a) // [-1, 3, 5] print(b) // [-1, 3, 5]