Extract a substring from a string in Ruby using a regular expression

Question

How can I extract a substring from within a string in Ruby?

Example:

String1 = \" \"

I want to extract

Answer 1

" "[/.*<([^>]*)/,1]
=> "substring"

No need to use scan, if we need only one result.
No need to use Python's match, when we have Ruby's String[regexp,#].

See: http://ruby-doc.org/core/String.html#method-i-5B-5D

Note: str[regexp, capture] → new_str or nil