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What is the concept of erasure in generics in Java?
... @Rogerio: No, the objects won't have different generic types. The fields know the types, but the objects don't.
– Jon Skeet
Dec 28 '09 at 8:55
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Convert a Python list with strings all to lowercase or uppercase
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Do you know the reason behind why a list comprehension is faster than map?
– Nixuz
Nov 26 '09 at 6:05
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Backup/Restore a dockerized PostgreSQL database
... solution is to use a data container. I didn't get the point of it before, now I do.
This data container allows to restore the data before starting the postgres container. Thus, when the postgres server starts, the data are already there.
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Simple conversion between java.util.Date and XMLGregorianCalendar
... of of it by simply representing time fields as primitive long in my POJO.
Now the generation of my WS client code handle everything correctly and no more XML-to-Java crap. And of course dealing with millis on the Java side is simple and painless.
KISS principle rocks!
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What are the basic rules and idioms for operator overloading?
...erator
The function call operator, used to create function objects, also known as functors, must be defined as a member function, so it always has the implicit this argument of member functions. Other than this, it can be overloaded to take any number of additional arguments, including zero.
Here'...
What are the benefits of Java's types erasure?
...T. The fact that T is an abstract, unbounded type parameter means that we know nothing about this type, therefore are prevented from doing anything special for special cases of T.
e.g. say I have a List xs = asList("3"). I add an element: xs.add("q"). I end up with ["3","q"].
Since this is paramet...
Sorting 1 million 8-decimal-digit numbers with 1 MB of RAM
...l of the values stored in the incessant stream of ICMP requests, and VALUE now contains the maximum integer. Pick some threshold T >> 1000000. Set COUNTER to zero. Every time you receive an ICMP packet, increment COUNTER and send the contained integer I back out in another echo request, unless...
What exactly is the meaning of an API? [closed]
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@user166390 wikipedia entry on api is now pretty bad...I write apis and that entry actually confused me. good thing you quoted what you did, as it has somehow gotten much worse apparently.
– eric
Dec 30 '14 at 14:37
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Differences between Ant and Maven [closed]
...hat they are used to automate the building of Java projects, but I do not know where to start from.
9 Answers
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Functional, Declarative, and Imperative Programming [closed]
...ty is broken at the interrupt abstraction layer. You don't really need to know this. To make RT expressions, you call pure functions.
Derivative attributes of RT
Any other attribute cited for declarative programming, e.g. the citation from 1999 used by Wikipedia, either derives from RT, or is shared...