class Array

def to(position)

%w().to(0) # => %w()
%w( a b c d ).to(10) # => %w( a b c d )
%w( a b c d ).to(2) # => %w( a b c )
%w( a b c d ).to(0) # => %w( a )

Returns the beginning of the array up to +position+. 
def to(position)
  self[0..position]
end