Am 10.11.2012 12:29, schrieb Hans Hagen: > On 11/10/2012 11:58 AM, Stephan Hennig wrote: >> Am 09.11.2012 22:10, schrieb Hans Hagen: >>> On 11/9/2012 9:22 PM, Stephan Hennig wrote: >>> >>>> That is, >>>> >>>> node.insert_after(nil, N, x) >>>> >>>> is not a short-cut for inserting after N, but returns x as new head? >>> >>> no, it returns n as head as well as x: >>> >>> head, current = node.insert_after(nil,current,x) >>> >>> boils down to >>> >>> head = current >>> current = x >> >> >> But this is in contrast to what the manual says. >> >> | If head is initially nil, it will become new. > > new == assigned
Or 42? I still think there's a contradiction. Let's go with abstract variable names. Assuming a function a, b = f(x,y,z) Now, I interpret what you said above as If x is nil (see above) then a becomes y. Whereas the LuaTeX manual says | If head is initially nil, it will become new. To translate that to our example If x is nil, then a becomes z. Where's my error? >>> head, current = node.insert_after(head,current,x) >>> >>> becomes: >>> >>> head = head or current or x >>> current = x >> >> All valuable additions to the manual ... > > it's not a 'how to mess with linked lists, more a reference manual -) Hans, do you think a function signature is enough documentation? What's in a name? Best regards, Stephan Hennig
