Linked List Recursion.

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Presentation transcript:

Linked List Recursion

Recursion Recursion recipe Base case: “Oh I know the answer” General case: “I know who to ask for the answer” OR “I know part of the answer and who to ask about the rest”

LL Base Cases Linked Lists base case options: Have a link to last node current->next == nullptr Have an element to work with Have a nullptr Gracefully handles empty list

LL General Case Have a pointer, and 1+ nodes off next Work with current Recursive call to current->next

Functions Recursive print: https://goo.gl/hMmVVX

Functions Recursive get length: https://goo.gl/hMmVVX nullptr base case gives right answer for empty list https://goo.gl/hMmVVX

Functions Recursive getLast https://goo.gl/hMmVVX Makes no sense on empty list https://goo.gl/hMmVVX