I presume that this is somewhat accurate: https://rosettacode.org/wiki/Deepcopy#Perl_6
On 11 July 2017 at 19:56, Gabor Szabo <szab...@gmail.com> wrote: > Hi, > > I wonder what does .clone do and how can I create a deep copy or deep > clone of an array? > > Reading https://docs.perl6.org/type/Array#method_clone I don't > understand what does it do as the example there works without clone as > well: > > suggest I'd need a > >> my @a = (1, 2, 3) > [1 2 3] >> my @b = @a; > [1 2 3] >> @a[1] = 42 > 42 >> @b.append(100) > [1 2 3 100] >> dd @a > Array @a = [1, 42, 3] > Nil >> dd @b > Array @b = [1, 2, 3, 100] > Nil > > > On the other hand if I have a deeper data structure, then even .clone > does not help. > > >> my @x = {a => 1}, {b => 2}; > [{a => 1} {b => 2}] >> my @y = @x.clone > [{a => 1} {b => 2}] >> @x[0]<a> = 42 > 42 >> dd @x > Array @x = [{:a(42)}, {:b(2)}] > Nil >> dd @y > Array @y = [{:a(42)}, {:b(2)}] > Nil > > So I wonder what does .clone do and how could I make a deep copy (deep > clone) of the whole data structure I have in @x. > > regards > Gabor
