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Why do pthreads’ condition variable functions require a mutex?
I’m reading up on pthread.h ; the condition variable related functions (like pthread_cond_wait(3) ) require a mutex as an argument. Why? As far as I can tell, I’m going to be creating a mutex just to use as that argument? What is that mutex supposed to do?
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Why an interface can not implement another interface?
...ion.
A 100% abstract class is functionally equivalent to an interface but it can also have implementation if you wish (in this case it won't remain 100% abstract), so from the JVM's perspective they are different things.
Also the member variable in a 100% abstract class can have any access qualifi...
How can I run code on a background thread on Android?
I want some code to run in the background continuously. I don't want to do it in a service. Is there any other way possible?
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R cannot be resolved - Android error
...the new Android SDK. I wanted to create a simple application to test drive it.
108 Answers
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Center a DIV horizontally and vertically [duplicate]
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After trying a lot of things I find a way that works. I share it here if it is useful to anyone. You can see it here working: http://jsbin.com/iquviq/30/edit
.content {
width: 200px;
height: 600px;
background-color: blue;
position: absolute; /*Can also be...
What is the difference between const_iterator and non-const iterator in the C++ STL?
What is the difference between a const_iterator and an iterator and where would you use one over the other?
7 Answers
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ERROR 1396 (HY000): Operation CREATE USER failed for 'jack'@'localhost'
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edited Nov 27 '19 at 1:54
Josh Correia
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How do I check if a variable exists?
...' intstead of myVar. If the variable name is not known when the code is written, it will be stored in a string variable at runtime, and the check I posted will also work.
– Ayman Hourieh
May 9 '09 at 13:46
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Why is “import *” bad?
It is recommended to not to use import * in Python.
12 Answers
12
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Difference between Pragma and Cache-Control headers?
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edited Jan 18 '16 at 9:45
Shashank Agrawal
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