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Does the JVM prevent tail call optimizations?
...irements could in theory be supported, but it would probably require a new bytecode (see John Rose's informal proposal).
There is also more discussion in Sun bug #4726340, where the evaluation (from 2002) ends:
I believe this could be done nonetheless, but it is not a small task.
Currently, t...
Can TCP and UDP sockets use the same port?
...level (OSI model level 4). So TCP has its own ports, which are interpreted by the TCP stack; UDP has its own ports, which are interpreted by the UDP stack. So to say, ports are not shared between UDP and TCP; it just happens that both protocols have the same definition of "ports" and that in order t...
Why would you ever implement finalize()?
...
Just make sure that an exception is never thrown by finalize(), or the garbage collector will not continue cleanup of that object, and you'll get a memory leak.
– skaffman
Oct 1 '08 at 16:04
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What are paramorphisms?
...dr c n [] = n
Some people call paramorphisms "primitive recursion" by contrast with catamorphisms (foldr) being "iteration".
Where foldr's two parameters are given a recursively computed value for each recursive subobject of the input data (here, that's the tail of the list), para's paramet...
Android Spanned, SpannedString, Spannable, SpannableString and CharSequence
...s the most commonly-used concrete implementation of CharSequence, followed by StringBuilder.
Spanned is a CharSequence with "spans" indicating formatting to apply to portions of the text, where those spans cannot be modified.
Spannable is a Spanned, adding in the ability to modify the spans (to ad...
Running single test from unittest.TestCase via command line
...nfortunately it cannot be used to occasionally run test that is "disabled" by rename
– Alois Mahdal
Apr 15 '13 at 12:29
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Java, Classpath, Classloading => Multiple Versions of the same jar/project
...ndException.
If you have two classes with the same binary name, searchable by the same classloader, and you want to know which one of them you are loading, you can only inspect the way that specific classloader tries to resolve a class name.
According to the java language specification, there is not...
Golang production web application configuration
...t;_logs/stderr.log
Another aspect is deployment. One option is to deploy by just sending binary file of the program and necessary assets. This is a pretty great solution IMO. I use the other option: compiling on server. (I’ll switch to deploying with binary files when I set up a so-called “Con...
What is the purpose of Node.js module.exports and how do you use it?
...yLongInternalName;
// add other objects, functions, as required
followed by:
const m = require('./mymodule');
m.shortName(); // invokes module.myVeryLongInternalName
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What are the First and Second Level caches in Hibernate?
...cache always Associates with the Session object. Hibernate uses this cache by default. Here, it processes one
transaction after another one, means wont process one transaction many
times. Mainly it reduces the number of SQL queries it needs to
generate within a given transaction. That is inste...