View source for Linklist.swap

== Calling Pattern ==
Call
 local k = sl.linklist()
 -- later
 local r,s = k.swap(a,b)

Arguments
 a is a number
 b is a number

Results
 r is a number
 s 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')
 k.swap(j0,j)
 print(k.value(k.head()))

 --> three

== Description ==

Calling swap reverses the values associated with valid link pseudo-indices a and b. For all successful calls, swap returns the [[tuple]] b,a.  If the list is empty or a (or b) is otherwise an invalid pseudo-index, swap returns 0.  

== See Also ==

* [http://www.easyuo.com/openeuo/wiki/index.php/Simplelib simplelib]

* [[deque]]

* [[linklist]]
* [[linklist.head]]
* [[linklist.insertafter]]
* [[linklist.insertbefore]]
* [[linklist.length]]
* [[linklist.nextlink]]
* [[linklist.prevlink]]
* [[linklist.removelink]]
* [[linklist.returntable]]
* [[linklist.setvalue]]
* [[linklist.tail]]
* [[linklist.value]]