# File activesupport/lib/active_support/core_ext/string/starts_ends_with.rb, line 6
 6:         def self.append_features(base)
 7:           if '1.8.7 and up'.respond_to?(:start_with?)
 8:             base.class_eval do
 9:               alias_method :starts_with?, :start_with?
10:               alias_method :ends_with?, :end_with?
11:             end
12:           else
13:             super
14:             base.class_eval do
15:               alias_method :start_with?, :starts_with?
16:               alias_method :end_with?, :ends_with?
17:             end
18:           end
19:         end

    # File activesupport/lib/active_support/core_ext/string/starts_ends_with.rb, line 27
27:         def ends_with?(suffix)
28:           suffix.respond_to?(:to_str) && self[-suffix.length, suffix.length] == suffix
29:         end

    # File activesupport/lib/active_support/core_ext/string/starts_ends_with.rb, line 22
22:         def starts_with?(prefix)
23:           prefix.respond_to?(:to_str) && self[0, prefix.length] == prefix
24:         end