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Why is creating a Thread said to be expensive?
... executed within the JVM thread in the OS. They are not often used, to my knowledge.
The biggest factor I can think of in the thread-creation overhead, is the stack-size you have defined for your threads. Thread stack-size can be passed as a parameter when running the VM.
Other than that, thread ...
Why is Lisp used for AI? [closed]
...for a very long time. Lisp is still great at tackling a problem you don't know how to solve yet. That description characterises AI perfectly.
Lisp supports symbolic programming well. Old AI was also symbolic. It was also unique in this regard for a long time.
Lisp is very powerful. The code/data dis...
Are table names in MySQL case sensitive?
...u root -p variables | grep table to check that lower_case_table_names is 1 now
You might need to recreate these tables to make it work.
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REST API Authentication
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For e.g. when a user has login.Now lets say the user want to create a forum topic, How will I know that the user is already logged in?
Think about it - there must be some handshake that tells your "Create Forum" API that this current request is from an au...
Is it possible to get CMake to build both a static and shared version of the same library?
...e-use object files for both static and shared target. Especially, general knowledge in SO is still very confusing about it, old/archives don't help to clarify it either, eg. cmake.org/pipermail/cmake/2008-March/020315.html A solid explanation of the status quo is needed. p.s. It wasn't me who downv...
String formatting in Python 3
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Python 3.6 now supports shorthand literal string interpolation with PEP 498. For your use case, the new syntax is simply:
f"({self.goals} goals, ${self.penalties})"
This is similar to the previous .format standard, but lets one easil...
python max function using 'key' and lambda expression
...function, it is equivalent to:
def func(p):
return p.totalScore
Now max becomes:
max(players, key=func)
But as def statements are compound statements they can't be used where an expression is required, that's why sometimes lambda's are used.
Note that lambda is equivalent to what you...
How to reliably guess the encoding between MacRoman, CP1252, Latin1, UTF-8, and ASCII
...n bother with them, or ISO-8859-1, just detect windows-1252 instead.
That now leaves you with only one question.
How do you distinguish MacRoman from cp1252?
This is a lot trickier.
Undefined characters
The bytes 0x81, 0x8D, 0x8F, 0x90, 0x9D are not used in windows-1252. If they occur, then as...
Separation of JUnit classes into special test package?
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@christopheml I agree, that's what I do now.
– Martin
Feb 22 '18 at 12:32
This work...
Select random lines from a file
...lines_78000000000.txt
This gives me a a file with 78 Billion newlines ;-)
Now for the shuf part:
$ time shuf -n 10 lines_78000000000.txt
shuf -n 10 lines_78000000000.txt 2171.20s user 22.17s system 99% cpu 36:35.80 total
The bottleneck was CPU and not using multiple threads, it pinned ...