On Wednesday, September 28, 2016 10:57:01 Rob Allan wrote: > But even > then, in most OO languages, this is implemented through strongly-typed > interfaces - so that if you tried to "publish" a message that wasn't > defined, you would get a compile error. Most OO languages - Smalltalk, C++ > C#, etc - are strongly typed and have robust compile-time checking, so you > can't just accidentally type the wrong name in a method call or property > access, and get no error.
For the record: although Smalltalk has "strong" types (i.e. you cannot extend
an object without changing its class), it is not statically checked! Variables
can store any type and it determines whether an object does have a message
during runtime. The better Smalltalk compilers do warn you (just warn, no
error) about messages that do not exist anywhere, so you have some safety
against typos.
OO does not require static checking - in fact polymorphy is much more powerful
in dynamic languages, like Smalltalk or PHP.
Also: Javascript is not an OO language: you are supposed to have classes, not
prototypes, for OO.
Konrad
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