arrays.swift

  2> class C {
  3.     var a = 1
  4. }
  5> var arr1 = [C()]
arr1: [C] = 1 value {
  [0] = {
    a = 1
  }
}
  6> var arr2 = arr1
arr2: [C] = 1 value {
  [0] = {
    a = 1
  }
}
  7> arr2[0].a = 2
  8> arr1
$R0: [C] = 1 value {
  [0] = {
    a = 2
  }
}
  9>