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Efficient method to generate UUID String in JAVA (UUID.randomUUID().toString() without the dashes)
...ould like an efficient utility to generate unique sequences of bytes. UUID is a good candidate but UUID.randomUUID().toString() generates stuff like 44e128a5-ac7a-4c9a-be4c-224b6bf81b20 which is good, but I would prefer dash-less string.
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What do two question marks together mean in C#?
Ran across this line of code:
18 Answers
18
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What are WSDL, SOAP and REST?
What is WSDL ? How is it related to SOAP ? Where does REST fit in all of that?
10 Answers
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Is there a way for multiple processes to share a listening socket?
In socket programming, you create a listening socket and then for each client that connects, you get a normal stream socket that you can use to handle the client's request. The OS manages the queue of incoming connections behind the scenes.
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Efficiently test if a port is open on Linux?
From a bash script how can I quickly find out whether a port 445 is open/listening on a server.
14 Answers
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How to use Class in Java?
There's a good discussion of Generics and what they really do behind the scenes over at this question , so we all know that Vector<int[]> is a vector of integer arrays, and HashTable<String, Person> is a table of whose keys are strings and values Person s.
However, what stumps me ...
What is the HEAD in git?
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HEAD is a reference to the last commit in the currently checked-out branch.
There is a small exception to this, which is the detached HEAD. A detached HEAD is the situation you end up in whenever you check out a commit (or tag)...
Git commits are duplicated in the same branch after doing a rebase
... merge will suffice. The Pro Git book that you linked basically explains this exact situation. The inner workings might be slightly different, but here's how I visualize it:
C5 and C6 are temporarily pulled out of dev
C7 is applied to dev
C5 and C6 are played back on top of C7, creating new diffs ...
Performance differences between debug and release builds
...f doesn't alter the emitted IL a great deal in the Release build. Notable is that it no longer emits the NOP opcodes that allow you to set a breakpoint on a curly brace. The big one is the optimizer that's built into the JIT compiler. I know it makes the following optimizations:
Method inlining...
How to nicely format floating numbers to String without unnecessary decimal 0?
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If the idea is to print integers stored as doubles as if they are integers, and otherwise print the doubles with the minimum necessary precision:
public static String fmt(double d)
{
if(d == (long) d)
return String.format("%...