Class: Ramaze::Struct

Makes it possible to access the keys directly by their name, not only their index. The original Struct#values_at tries to call #to_int on the arguments. in Ruby < 1.9 this would lead to a quite unintuitive IndexError, while in 1.9 it will say outright that it cannot convert Symbol into Integer. I think this is neither useful nor expected, so we extend Struct#values_at to recognize valid members of the Struct passed into the method and return their values in the same order, just like Hash#values_at.

Example:

 Point = Struct.new(:x, :y)
 point = Point.new(15, 10)

 # Old behaviour:
 point.values_at(0, 1)
 # => [15, 10]
 point.values_at(0..1)
 # => [15, 10]
 point.values_at(:y, :x)
 # => IndexError: offset 20697 too large for struct(size:2)

 # Added new behaviour:
 point.values_at(:y, :x)
 # => [10, 15]