diff options
Diffstat (limited to 'activesupport/lib/active_support/core_ext/symbol/to_proc.rb')
-rw-r--r-- | activesupport/lib/active_support/core_ext/symbol/to_proc.rb | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/core_ext/symbol/to_proc.rb b/activesupport/lib/active_support/core_ext/symbol/to_proc.rb new file mode 100644 index 0000000000..520369452b --- /dev/null +++ b/activesupport/lib/active_support/core_ext/symbol/to_proc.rb @@ -0,0 +1,14 @@ +class Symbol + # Turns the symbol into a simple proc, which is especially useful for enumerations. Examples: + # + # # The same as people.collect { |p| p.name } + # people.collect(&:name) + # + # # The same as people.select { |p| p.manager? }.collect { |p| p.salary } + # people.select(&:manager?).collect(&:salary) + # + # This is a builtin method in Ruby 1.8.7 and later. + def to_proc + Proc.new { |*args| args.shift.__send__(self, *args) } + end unless :to_proc.respond_to?(:to_proc) +end |