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Is it possible at all to create eventlisteners (i.e. when the value changes) for a variable of type string, int, bool, etc.?
I haven’t seen this in any programming language so far, except for some Collections (like ArrayCollection in Flex), which use events to detect changes in the collection.
If not possible at all, why not? What’s the reason for this? Are there any best practices to achieve the same sort of functionality? And what about extending functionality with databinding?
I guess this sort of functionality is not added in any framework/runtime since it would create a big overhead (think on how many times you modify a variable holding a primitive type within the average application) while being not used under normal circunstances.
Anyway, in .NET at least (and I guess that in other OO environments as well), you can define properties, which are accessed as normal variables but can have associated code that reacts when its value is read or modified.