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Unpacking, extended unpacking and nested extended unpacking
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My apologies for the length of this post, but I decided to opt for completeness.
Once you know a few basic rules, it's not hard to generalize them. I'll do my best to explain with a few examples. Since you're talking about evaluating these "by hand," I'll suggest some simple substitution ru...
How to see which plugins are making Vim slow?
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Multiple select statements in Single query
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Xcode Project vs. Xcode Workspace - Differences
... an application or library) is built. They include build settings, such as compiler and linker flags, and they define which files (source code and resources) actually belong to a product. When you build/run, you always select one specific target.
It is likely that you have a few targets that share ...
Enable Vim Syntax Highlighting By Default
... options:
Create an empty vimrc.
Copy vimrc_example.vim as your vimrc (recommended, thanks @oyenamit). You can find vimrc_example.vim in the runtime directory.
The location of the runtime directory varies between operating systems:
On my system (Arch Linux, and Mac, thanks @totophe), it's in /...
What does the M stand for in C# Decimal literal notation?
...were unambiguous (and it may well be, although "1e" ends up with a curious compiler error message suggesting it's out of the range of viable doubles, not that it's syntactically invalid; I suspect that's a bug) it would still be confusing. "c" would possibly make sense without causing any confusion,...
std::vector performance regression when enabling C++11
... also pass the -flto flag to gcc 4.7.2), the results are identical:
(I am compiling your original code, with container.push_back(Item());)
$ g++ -std=c++11 -O3 -flto regr.cpp && perf stat -r 10 ./a.out
Performance counter stats for './a.out' (10 runs):
35.426793 task-clock ...
How to drop into REPL (Read, Eval, Print, Loop) from Python code
...arbitrary point in its execution, even if the script was launched from the command line?
6 Answers
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Why doesn't c++ have &&= or ||= for booleans?
...forming C++ code.
1 Admittedly this is a rather big caveat as Angew’s comment illustrates:
bool b = true;
b &= 2; // yields `false`.
The reason is that b & 2 performs integer promotion such that the expression is then equivalent to static_cast<int>(b) & 2, which results in ...