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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)...
How to know if an object has an attribute in Python
Is there a way in Python to determine if an object has some attribute? For example:
14 Answers
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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 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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How can I check if a value is a json object?
My server side code returns a value which is a json object on success and a string 'false' on failure. Now how can I check whether the returned value is a json object?
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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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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 ...
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...
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 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("%...