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What does the ??!??! operator do in C?
...
if (ErrorHasOccured())
HandleError();
Guru of the Week (deals with C++ but relevant here), where I picked this up.
Possible origin of trigraphs or as @DwB points out in the comments it's more likely due to EBCDIC being difficult (again). This discussion on the IBM developerworks board seems...
How do I sort a vector of pairs based on the second element of the pair?
...
EDIT: using c++14, the best solution is very easy to write thanks to lambdas that can now have parameters of type auto. This is my current favorite solution
std::sort(v.begin(), v.end(), [](auto &left, auto &right) {
return ...
How to “return an object” in C++?
...d value because it's inefficient
Prove it.
Look up RVO and NRVO, and in C++0x move-semantics. In most cases in C++03, an out parameter is just a good way to make your code ugly, and in C++0x you'd actually be hurting yourself by using an out parameter.
Just write clean code, return by value. If ...
Python 3 turn range to a list
...he debates whether the object is filled during the construction (as in the C++ case) or only during the first automatically called method (as in the Python __init__() method) cannot change the basic abstract idea. My view is that the list constructor takes the iterator and fills the list with the re...
What is your favorite C programming trick? [closed]
... __PRETTY_FUNCTION__ in C (GCC) is just another alias for __func__, but in C++ it will get you the full function signature.
– sklnd
Oct 14 '11 at 15:24
...
libpng warning: iCCP: known incorrect sRGB profile
...n uses the Qt Library.
Example
Here is a minimal example I have written in C++ in order to demonstrate how to implement the proposed solution:
QPixmap pixmap;
pixmap.load("badProfileImage.png");
QFile file("goodProfileImage.png");
file.open(QIODevice::WriteOnly);
pixmap.save(&file, "PNG");
The...
Get encoding of a file in Windows
...; directory
duration.h; ASCII C++ program text, with CRLF line terminators
ipch; directory
main.cpp; ASCII C program text, with CRLF line terminators
Precision.txt; ASCII text, with CR...
Return multiple values to a method caller
I read the C++ version of this question but didn't really understand it.
27 Answers
...
Simple explanation of MapReduce?
... the size of the city:
(defparameter *cities*
'((a :people 100000 :size 200)
(b :people 200000 :size 300)
(c :people 150000 :size 210)))
Now you may want to find the city with the highest population density.
First we create a list of city names and population density using MAP:
(map '...
Error “gnu/stubs-32.h: No such file or directory” while compiling Nachos source code
...where before you build (say in your .bashrc).
If you are also compiling C++ code, you will also need the 32 bit stdc++ library. If you see this warning:
.... /usr/bin/ld: cannot find -lstdc++ ....
On Ubuntu you will need to do sudo apt-get install g++-multilib
On CentOS 5 you will need t...