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How to synchronize a static variable among threads running different instances of a class in Java?
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The reason #3 is the best is that any random bit of code could synchronize on Test.class and potentially spoil your day. Also, class initialization runs with a lock on the class held, so if you've got crazy class initializers you can give yourself headaches. vol...
Calling constructors in c++ without new
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I guess these types of actions are optimized and therefore, do not significantly differ in performance aspects.
– M. Williams
Apr 27 '10 at 16:14
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How to get string width on Android?
... edited Oct 6 '16 at 22:03
Andrii Abramov
7,20566 gold badges4848 silver badges7070 bronze badges
answered Sep 2 '10 at 19:05
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How to COUNT rows within EntityFramework without loading contents?
... Can you tell me why is it different with the SelectMany? I don't understand. I do it without SelectMany but it gets really slow because I have over 20 million records. I tried the answer from Yang Zhang and works great, just wanted to know what the SelectMany does.
– mikesof...
What is tail call optimization?
... space as (fact 3). This is not the case with the non-tail-recursive fact, and as such large values may cause a stack overflow.
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Proper stack and heap usage in C++?
I've been programming for a while but It's been mostly Java and C#. I've never actually had to manage memory on my own. I recently began programming in C++ and I'm a little confused as to when I should store things on the stack and when to store them on the heap.
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'size_t' vs 'container::size_type'
Is there is a difference between size_t and container::size_type ?
3 Answers
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Can I replace groups in Java regex?
I have this code, and I want to know, if I can replace only groups (not all pattern) in Java regex.
Code:
7 Answers
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What should I do if two libraries provide a function with the same name generating a conflict?
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If you control one or both: edit one to change the name and recompile Or equivalently see Ben and unknown's answers which will work without access to the source code.
If you don't control either of them you can wrap one of them up. That is compile another (statically linked!) libr...
What is the difference between the states selected, checked and activated in Android?
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The difference between Checked and Activated is actually quite interesting. Even the Google documentation is apologetic (emphasis below added):
... For example, in a list view with single or multiple selection
enabled, the views in the current selec...