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Why is enum class preferred over plain enum?
..., human }; // another enum class
void fun() {
// examples of bad use of plain enums:
Color color = Color::red;
Card card = Card::green_card;
int num = color; // no problem
if (color == Card::red_card) // no problem (bad)
cout << "bad" << endl;
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How to find and return a duplicate value in array
...ds test cases, etc.
If you need an even faster solution, maybe try C instead.
And here is the gist comparing different solutions: https://gist.github.com/naveed-ahmad/8f0b926ffccf5fbd206a1cc58ce9743e
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Why .NET String is immutable? [duplicate]
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Instances of immutable types are inherently thread-safe, since no thread can modify it, the risk of a thread modifying it in a way that interferes with another is removed (the reference itself is a different matter).
Similarly, the fact that aliasing can't produce changes ...
Why can't variables be declared in a switch statement?
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Arsen Khachaturyan
5,90933 gold badges3232 silver badges3434 bronze badges
answered Sep 18 '08 at 13:17
TJ SeabrooksTJ Seabrooks
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How to convert a data frame column to numeric type?
...ot the most confounding thing, but it can confuse you, especially if you read this before rolling into bed.
Here goes: first two columns are character. I've deliberately called 2nd one fake_char. Spot the similarity of this character variable with one that Dirk created in his reply. It's actually a...
Set active tab style with AngularJS
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A way to solve this without having to rely on URLs is to add a custom attribute to every partial during $routeProvider configuration, like this:
$routeProvider.
when('/dashboard', {
templateUrl: 'partials/dashboard.html',
controller: widgetsController,
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Is it smart to replace boost::thread and boost::mutex with c++11 equivalents?
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There are several differences between Boost.Thread and the C++11 standard thread library:
Boost supports thread cancellation, C++11 threads do not
C++11 supports std::async, but Boost does not
Boost has a boost::shared_mutex for multiple-reader/single-writer locking. The...
Insert a commit before the root commit in Git?
...heckout, you have to replace the first line with this:
git symbolic-ref HEAD refs/heads/newroot
2. Rewrite history to start from this empty commit
You have two options here: rebasing, or a clean history rewrite.
Rebasing
git rebase --onto newroot --root master
This has the virtue of simplici...
Pull request vs Merge request
... requests and merge requests, but a merge/pull request refers to a much broader topic than just these two commands.
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Why is creating a new process more expensive on Windows than Linux?
...ortant role on NT than on Unix as NT, in contrast to Unix, favors multithreading over multiprocessing.
Rob, it is true that fork is relatively cheap when COW is used, but as a matter of fact, fork is mostly followed by an exec. And an exec has to load all images as well. Discussing the performance ...