Function prepend [src]

Insert a new node at the beginning of the list. Arguments: new_node: Pointer to the new node to insert.

Prototype

pub fn prepend(list: *DoublyLinkedList, new_node: *Node) void

Parameters

list: *DoublyLinkedListnew_node: *Node

Source

  pub fn prepend(list: *DoublyLinkedList, new_node: *Node) void {
    if (list.first) |first| {
        // Insert before first.
        list.insertBefore(first, new_node);
    } else {
        // Empty list.
        list.first = new_node;
        list.last = new_node;
        new_node.prev = null;
        new_node.next = null;
    }
}  