Linked list questions

[Derrick Lewis]

How do i keep a linked list sorted? How do i remove if more than 10 items?

from node import node
 
probe = head
count = 0
while probe != None:
    count += 1
    probe = probe.next
return count
 
def insert(newName, newScore, head):
    probe.next.score = newScore
    if head is None:
        head = newNode
    else:
        probe = head
        while probe.next != None:
                probe = probe.next
                probe.next = newNode
    return head
 
def printStructure(newName, newScore):
    probe = head
    while probe != None:
        print "Name: ", probe.name,
        print "Score: ", probe.score
        probe = probe.next
 
def main():
    head  = None
 
    head = insert("She-RA", 1088, head)
    printStructure(head)
 
    #Add ten nodes to the beginning of the linked structure
    head = insert("He-MAN", 32464, head)
    head = insert("Doc-Ock", 143322, head)
    head = insert("Spidey", 6416, head)
    head = insert("Superman", 63438, head)
    head = insert("Arceus", 92515, head)
    head = insert("Batman", 11986, head)
    head = insert("Homer", 26712, head)
    head = insert("F-ZERO", 833849, head)
    insert("Dlew58", 999999, head)
    print "Top Ten"
    printStructure(head)
if __name__ == "__main__":
    main()
 

[dwblas]

A linked list is not sorted, it is linked in some order. So if you have records with the values 'A', 'C', 'E', 'G', 'H' in the linked list and you wanted to add 'B', the next record number would then be 6, so record number 1 would point to 6 instead of 2, and record 6 would point to the second record to keep them in order.

How do i remove if more than 10 items?

It depends on if you are talking about memory or a file on disk. Generally you mark it as deleted, and simply remove the link to it, so the record that points to it would point to the record that it used to point to. Practically speaking, regenerating the linked list isn't necessary every time a record is deleted but is done after some threshold is reached. To regenerate the linked list, you would copy the records in the original list to a new memory location or file without copying the deleted records.