duck typing
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duck typing
(programming)A term coined by Dave Thomas for a kind of
dynamic typing typical of some programming languages, such
as Smalltalk, Ruby or Visual FoxPro, where a
variable's run-time value determines the operations that
can be performed on it.
The term comes from the "duck test": if it walks like a duck and quacks like a duck, it must be a duck.
Duck typing considers the methods to which a value responds and the attributes it posesses rather than its relationship to a type hierarchy. This encourages greater polymorphism because types are enforced as late as possible.
http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/100511.
The term comes from the "duck test": if it walks like a duck and quacks like a duck, it must be a duck.
Duck typing considers the methods to which a value responds and the attributes it posesses rather than its relationship to a type hierarchy. This encourages greater polymorphism because types are enforced as late as possible.
http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/100511.