regardless of whether or not CF is duck typed or dynamic, the dynamic languages I've used have all had this ability. Say you have an cfc that expects a vehicle, you send it a bike and you send it a car, both are vehicles, but both behave differently in some aspects. They may both have a 'go', but only the car will have 'checkFuelLevel'. Which would be the bigger performance hit, using a try catch block or just checking the type or class of an object?
On 6/6/07, Jake Pilgrim <[EMAIL PROTECTED]> wrote: > You don't want to do that in Coldfusion - it is unnecessary and is actually a > performance hit as well. Read up on 'duck typing' - Sean Corfield has a nice > powerpoint that outlines this concept. You have to remember that Coldfusion > does not enforce strict typing; Coldfusion is not Java!! The basic idea is > that if you pass in a value (be it a string, query, object, whatever) and it > works within your code, it is of the correct type (if it walks like a duck, > quacks like a duck, it's a duck!). If you pass in a numeric value to a > function that is expecting a string, it's going to work. If you pass in an > object with properties x, y, and z to a function expecting an object with > properties x, y, and z it's going to work. If you were to restrict your > function to only accept objects with a type of cfc.exampleObj, you are > unnecessarily restricting the possible input of your function as well as > creating a performance loss by making your function check the object's type > in the first place! > > As defined by Wikipedia - http://en.wikipedia.org/wiki/Duck_typing > > Jake Pilgrim > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| ColdFusion MX7 and Flex 2 Build sales & marketing dashboard RIAâs for your business. Upgrade now http://www.adobe.com/products/coldfusion/flex2?sdid=RVJT Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:280320 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
