Looking for an equivalent to recursion within a for lo

Dear List Members:

I have run into a situation where I must increment a counter.  This can be
worked around using recursion and calling a template. However, I need to
increment the counter while I iterate through a node-set.  This would
normally just be a matter of adding another parameter to the template call,
but I have to increment the counter based on a condition while iterating
through the node-set.

The pseudo-code for this particular situation would be something like this:

function process-list-conditionally(list L)
{
  if (not-empty(L))
	for-each(L)
	  if (true)
	 	increment-counter
	  otherwise
		counter
}

Does anyone have any suggestions for how this might be accomplished?  I've
found myself running into recursion within a for loop, which is not
possible.

Thanks for any suggestions.
Erika

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