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Functional Programming at Work in Object-Oriented Programming Narbel version 2010 Narbel Functional Programmingat Work in Object-OrientedProgramming 1 AClaimaboutProgrammingStyles Claim: Adding functional programming capabilities to an object-oriented language leads to benefits in object-oriented programming design. Narbel Functional Programmingat Work in Object-OrientedProgramming 2 Existing Languages with a FP-OOP Mix SomeoldandlessoldlanguageswithFP+OOP: For instance, Smalltalk, Common Lisp (CLOS). Morerecently, Python or Ruby. Notations: FP, Functional programming; OOP, Object-oriented programming, Narbel Functional Programmingat Work in Object-OrientedProgramming 3 FPtechniquesemulatedin OOP Practices in OOP languages include emulations of FPtechniques: C++programmers: functionpointers and overloadingsof the () operator, i.e. “object-functions” or functors. Java programmers: anonymousclassesand introspection/reflexion. Narbel Functional Programmingat Work in Object-OrientedProgramming 4
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