How to delete a node with a given key/value from linked list data structure
This function deletes a node with a specific key from the linked list. It first checks if the list is empty. If it is, it prints an error message and terminates. It then checks if the head node contains the key. If it does, it deletes the head node. If not, it traverses the list to find the node that contains the key and deletes it. In all valid cases, the length of the list is decreased by one. If the list becomes empty after the deletion or if the deleted node was the tail node, it also updates the tail appropriately.
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