On 11/9/2012 8:19 PM, Stephan Hennig wrote:

What is the advantage of this to the naive

   local n = head
   while n do
     ...
     n = n.next
   end

convenience

Regarding traverse_id

Again, what is the advantage of this to the naive

   local n = head
   while n do
     if n.id == <id> then
       ...
     end
     n = n.next
   end

speed, as in jumps over (successive) nodes that don't match id and it saves at least one function call per lookup.

Anyhow, it all depends on the kind of code you write. In practice node lists are relatively small so you can choose the loop method that you like most. So, when you manipulate the list, the method that you call 'naive' is often the most suitable.

Hans

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