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What is The Rule of Three?
...antics.
This means that objects are implicitly copied in various contexts,
and we should understand what "copying an object" actually means.
Let us consider a simple example:
class person
{
std::string name;
int age;
public:
person(const std::string& name, int age) : name(name), ag...
Sending files using POST with HttpURLConnection
Since the Android developers recommend to use the HttpURLConnection class, I was wondering if anyone can provide me with a good example on how to send a bitmap "file" (actually an in-memory stream) via POST to an Apache HTTP server. I'm not interested in cookies or authentication or anything com...
Are there other whitespace codes like   for half-spaces, em-spaces, en-spaces etc useful in HTML
...than one space in the font, except for nbsp, where it renders as one space and imposes the non-breaking character. A real shame. There are cases where only a character will do, for instance when padding is being controled or passed to something else with constructs like before:
...
What is the __del__ method, How to call it?
... ends. In particular, unless there are circular references, CPython (the standard Python implementation) will garbage collect immediately.
However, this is an implementation detail of CPython. The only required property of Python garbage collection is that it happens after all references have been...
How to trace the path in a Breadth-First Search?
... return path
# enumerate all adjacent nodes, construct a new path and push it into the queue
for adjacent in graph.get(node, []):
new_path = list(path)
new_path.append(adjacent)
queue.append(new_path)
print bfs(graph, '1', '11')
Another appro...
Override Java System.currentTimeMillis for testing time sensitive code
...commend that instead of messing with the system clock, you bite the bullet and refactor that legacy code to use a replaceable clock. Ideally that should be done with dependency injection, but even if you used a replaceable singleton you would gain testability.
This could almost be automated with se...
Change navbar color in Twitter Bootstrap
...avigation"></nav>
Default color usage
Here are the main colors and their usage:
#F8F8F8: navbar background
#E7E7E7: navbar border
#777: default color
#333: hover color (#5E5E5E for .nav-brand)
#555: active color
#D5D5D5: active background
Default style
If you want to put some custom...
How to remove/delete a large file from commit history in Git repository?
... a DVD-rip into a website project, then carelessly git commit -a -m ... , and, zap, the repo was bloated by 2.2 gigs. Next time I made some edits, deleted the video file, and committed everything, but the compressed file is still there in the repository, in history.
...
Volatile vs. Interlocked vs. lock
...he point of volatile is that multiple threads running on multiple CPUs can and will cache data and re-order instructions.
If it is not volatile, and CPU A increments a value, then CPU B may not actually see that incremented value until some time later, which may cause problems.
If it is volatile, th...
Realistic usage of the C99 'restrict' keyword?
I was browsing through some documentation and questions/answers and saw it mentioned. I read a brief description, stating that it would be basically a promise from the programmer that the pointer won't be used to point somewhere else.
...