Specs: describe "Array" do describe "sum_numbers" do it "sums consecutive numbers" do [1,2,3].sum_numbers.should eq(6) end it "sums random numbers" do [5,23,4].sum_numbers.should eq(32) end end end describe "String" do describe "camel_case" do it "leaves first word lowercase" do "test".camel_case.should eq("test") end it "should lowercase first …

Loop's: Each Method

class String 
  
      def camel_case
          # "this is A TEST"
         array_of_words = self.split
         # ["this","is","A","TEST"]
         array_of_words.each do |foo|
           # "this"
           foo.capitalize!
           # "This"
         end
         # ["This", "Is", "A", "Test"]
         array_of_words.first.downcase!
         # ["this", "Is", "A", "Test"]
         array_of_words.join  # "thisIsATest"
      end
end

p "test".camel_case
p [0,1,2,3].sum_numbers

p ["apple", "banana", "orange"].add_index