ruby_weird.rb

main » DESIRED_CLASS
/price|product-price/i
main » node.attributes.values.map(&:to_s).first =~ DESIRED_CLASS
0
main » node.attributes.values.map(&:to_s).first =~ /price/
0
main » node.attributes.values.map(&:to_s).first == /price/
false
main » node.attributes.values.map(&:to_s).first == "price"
true
main » node.attributes.values.map(&:to_s).first
"price"
main » node.attributes.values.map(&:to_s).first.match(DESIRED_CLASS)
#<MatchData "price">