' irb(main):024:0> "x".to_int NoMethodError: undefined method `to_int' for "x":String from (irb):24 from /usr/bin/irb:12:in `

' Kind regards robert -- remember.guy do |as, often| as.you_can - without end http://blog.rubybestpractices.com/ --20cf30050e8a994c9404d917a634 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable

On Fri, Mar 29, 2013 at 5:38 PM, Joel Pearson <= ;lists@ruby-forum= .com> wrote:

Sometimes it's best to let the errors occur, there'= ;s already a certain
amount of error-handling in Ruby.

Anyway, this should do what you want:

def Add_two_numbers(x,y)
[x,y].each { |num|
fail ArgumentError, "#{num} is not a number" unless num.is_a? Fix= num
}
x + y
end=A0

Better use Integer for the test because Fi= xnums turn to Bignums from a certain number on. =A0Using #to_int or Integer= () is a simpler approach as it includes the exception throwing code with a = meaningful error message already:

irb(main):023:0> Integer("x")

ArgumentError: invalid value for Integer(): "x"<= /div>

=A0 =A0 =A0 =A0 from (irb):23:in `Integer'

=A0 =A0 =A0 =A0 from (irb):23

=A0 =A0 =A0 =A0 from /usr/bin/irb:12:in `<main>'= ;

irb(main):024:0> "x".to_int

No= MethodError: undefined method `to_int' for "x":String

=A0 =A0 =A0 =A0 from (irb):24

=A0 =A0 =A0 =A0 from /usr/bin/irb:12:in `<main>'

K= ind regards

robert

--
remember.guy do |as, often| as.you_can - without end<= br>http://blog.rubybestpract= ices.com/

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