While this is cool, you can also just do `some_enum.sum` (also works with string concacts) One thing that is cool about the .to_proc shorthand though is, for

While this is cool, you can also just do `some_enum.sum` (also works with string concacts) One thing that is cool about the .to_proc shorthand though is, for example, you have a method def square_it(x); x * 2; end; people tend to write an enumeration that uses it like items.map {|i| square_it i } but you can actually write it like this items.map(&method(:square_it)) So not only can you write shorthands to methods on the object itself, you can write shorthands to other methods and "automagically" pass the item as its argument. Nifty stuff.