Linklist.prevlink
From OpenEUO
Calling Pattern
Call
local k = sl.linklist() -- later local r = k.prevlink(a)
Arguments
a is a number
Results
r is a number
Example Usage
local k = sl.linklist() local j = k.inserta(0,'one') local j0 = j j = k.inserta(j,'two') j = k.inserta(j,'three') print(k.value(k.prev(j)))
--> two
Description
Calling prevlink returns the pseudo-index of the link preceding the valid link with pseudo-index a. If the list is empty, if a is the head of the list, or if a is otherwise an invalid pseudo-index, prevlink returns 0.
