Question

I have the following:

titles = []
url = []

titles.each do |link|
  if link[:href] =~ 'http://www.google.com'
    url.push(link[:href])
  end
end

But I keep getting a TypeError:

TypeError: type mismatch: String given

P.S. I am trying to use Nokogiri to parse the links returned from a particular URL. If anyone has any links, aside from the Nokogiri tutorial/wiki, about how to best do that, please let me know.

Answer 1

The =~ operator is used for matching Regexp, not strings.

Match—If obj is a Regexp, use it as a pattern to match against str,and
returns the position the match starts, or nil if there is no match.
Otherwise, invokes obj.=~, passing str as an argument. The default =~
in Object returns nil.

http://ruby-doc.org/core-1.9.3/String.html#method-i-3D-7E

This would work, assuming you want to check if http://www.google.com is included in the string :

titles = []
url = []

titles.each do |link|
    if link[:href] =~ /http:\/\/www.google.com/
       url.push(link[:href])
    end
end