Iterators/vectors (was: [Biocorba-l] BSANE and bioCORBA)

[Antoine van Gelder]

On 31 May 2001 23:39:19 +0100, Martin Senger wrote:
>   Although I thing that it is not big issue I feel that implementation
> with 'out' parameter and returning boolean is easier and also it saves one
> network call.
>    I do not like raising any Exception as a "normal" behaviour - that
> makes the codeclumsy and less readable.

Iterator patterns that return bool are much cleaner as it allows for
code such as:

Object obj;
while (someIterator.next(&obj)) {
  obj.dostuff();
}

Instead of:

while (someIterator.has_more()) {
  Object obj = someIterator.theObject();
}

Which is heavier on both network calls and object constructor calls.

Or even worse if I understood Brad correctly:

try {
  while (someIterator.hasNext()) {
    SomeObj obj = someIterator.the_object();  
  }
} catch (SomeException) {
  // extremely cpu expensive way of ending a loop adding huge
  // overhead to even the simplest algorithm not to mention
  // the pain you cause in terms of memory management for
  // c++ developers.
}

 - a