[Pharo-users] Can it do this way ?

[Roelof Wobben via Pharo-users]

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Hello,

I have now a challenge where I have to validate a ISBN number.

Can I do something like this on the class side :

(string isEmpty)
   ifTrrue: [ ^ false]
  ifFalse:  [ digits:= something.
                   controlDigit := something.
                   self validateISBNNumber]

where on the validateISBNNumber I use the instance variables digits and controlDigit to validate the ISBN number on the instance side.

Roelof

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