On 07/04/11 09:06, Paul Isambert wrote: > > Problem 2: -- A question, rather.
Missed this, earlier. > The manual says you're in charge of ensuring that in > "node.insert_after(H, N, x)", N is in the list denoted by H. The thing > is, H doesn't seem to matter at all, unless it's nil: Actually H is also useful if N is nil (that is a tail-append the list that starts at H), but it is true that H is generally unused. > So what's the need to denote the list where the insertion occurs if it > is ignored? In other words, couldn't node.insert_after and associates > work with only two arguments? It could, but the above two cases are both useful sometimes in code running inside loops. Best wishes, Taco
