Web Scraping With Ruby
Introduction to web scraping with Ruby. How to handle http connections, parse html files for data, best practices, tips and an example project.
Counting selection can be a very powerful feature in XPath when parsing web scraped HTML pages.
Selection count can be used to navigate complex trees where parsing by attributes or values is not possible.
For this count()
function can be used. See these interactive examples:
The count()
function is a great way to navigate bare HTML trees that otherwise might appear unparsable.