in XML:TWIG, how to stop parsing once find the interested element

Question

I only want to parse an interested element of xml (e.g. see below: class element with name equals to math) and I want to stop once the first element hitting this condition i

Answer 1

It seems what you're looking for are XML::Twig's finish_print and finish_now :

finish_print

Stops twig processing, flush the twig and proceed to finish printing the document as fast as possible. Use this method when modifying a document and the modification is done.

finish_now

Stops twig processing, does not finish parsing the document (which could actually be not well-formed after the point where finish_now is called). Execution resumes after the Lparse> or parsefile call. The content of the twig is what has been parsed so far (all open elements at the time finish_now is called are considered closed).