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Not only that but, since the constraint is not enforced at compile time, it is possible that at one point the method It is merely the default collection interface, the least number of keystrokes. The implementer of this method almost certainly did not mean to communicate that the List should be Have to read through the implementation, read possibly existent and possibly accurate Javadocs or write exploratory To know that the method is respecting that functional paradigm, I would Methods like these give me new appreciation for the functional programming constraint

Preffered users removed? Assuming that my intention is to have a list of all users and a list with preferred usersĮxcluded, there really would be no way to know whether it is safe to pass in the list of all users or whether we Public List removePreferredUsers (List list)ĭoes the method modify the list I give it? Is the returned list a new list or the same list but now with Take for example the following ambiguous signature in Java. In the next post I will compare immutability with regard to objects in Java andĪlthough decisions regarding immutability are often less business decisions than architectural ones, stating themĮxplicitely in the language does allow one to reason about code and understand the intention in software muchīetter. With regard to collections, is also an important design decision which is buried in the implementation in Java but are In this post I will discuss how immutability, in particular In Java but which is a first class concept in Kotlin. In the last post Iįocused on nullability as a key business and architectural decision which, regretablly, has no top level expression Python Dictionaries Access Items Change Items Add Items Remove Items Loop Dictionaries Copy Dictionaries Nested Dictionaries Dictionary Methods Dictionary Exercise Python If.Else Python While Loops Python For Loops Python Functions Python Lambda Python Arrays Python Classes/Objects Python Inheritance Python Iterators Python Polymorphism Python Scope Python Modules Python Dates Python Math Python JSON Python RegEx Python PIP Python Try.In the previous post I explained that the reason our team made the jump to Kotlin was primarily because of Kotlin'sĪbility to express business and architectural decisions in a much clearer way than Java can.