[Perl] How do I handle and manipulate data structures like linked lists or stacks in Perl?

In Perl, you can handle and manipulate data structures like linked lists or stacks using arrays and references. Here's a brief explanation of how you can work with these data structures:

  1. Linked Lists:

    • In Perl, you can implement a linked list by using an array of references where each reference points to the next element in the list.

    • To create a linked list, you can create an array and assign references to each element of the array using the [] syntax.

    • Example:

      1my @linked_list = (
      2    { value => 1, next => undef },
      3    { value => 2, next => undef },
      4    { value => 3, next => undef }
      5);
      
    • In the example above, @linked_list represents a linked list with three elements, each containing a value and next pointer.

  2. Stacks:

    • In Perl, you can implement a stack using a regular array and performing operations like push and pop.

    • To push an element onto the stack, you can use the push function, and to pop an element from the stack, you can use the pop function.

    • Example:

      1my @stack = ();
      2
      3# Push elements onto the stack
      4push @stack, 1;
      5push @stack, 2;
      6push @stack, 3;
      7
      8# Pop elements from the stack
      9my $value = pop @stack;
      
    • In the example above, @stack represents a stack, and you can push elements onto it using push and pop elements from it using pop.

These are just basic examples to get you started with linked lists and stacks in Perl. Depending on your requirements, you may need to implement additional functionality like inserting at a specific position, deleting elements, etc.