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Rails - Basic Steps IV

Controls Structures

  • If
             if  expression
                code
             end
  • if- else

             if  expression
                code
             elsif  expression2
                code
             else
                code
             end


  • until
             until expression do
                  code
             end
  • for
             for var in collection
                  code
             end
  • while
             while condition do
                  code
             end

Hashes

  • Ex:  phone = {'home'=>1, 'home2'=>2}
  • Better way:  phone = {:home=>1, :home2=>2}
  • Methods
    • phone[:home]
    • phone.key(1)
    • phone.key?(:home)
    • phone.value?(1)


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