class Array

def to(position)

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

Returns the beginning of the array up to +position+. 
def to(position)
  first position + 1
end