Ruby-删除h3标签替换为章节编号序列

Question

Ruby - Hi, I have max 200 html h3 headings in a html document. I am deleteing all, with characters between the two tags, using x.gsub(/\<h3\>(.*)\<\/h3\>/, '<h3>Chapter </h3>') . My problem is: I need to insert the individual chapter numbers 1, 2, 3 and so on. Is this possible using a hash or some other way?

Answer 1

You could do this...

# Establish a counter
i = 0
x.gsub( %r{<h3>(.+?)</h3>}i ){ |match| i+=1; "Chapter #{i}" }

The %r{...} is another way of defining a RegExp literal ( /.../ ), it helps here, so you don't need to escape the slash; looks a bit cleaner...