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How can I reliably get an object's address when operator& is overloaded?
...conversion and the 2nd one is Function-to-Pointer conversion both having "Exact Match" rank (13.3.3.1.1 table 9).
The reference to function pass through addr_impl_ref, there is an ambiguity in the overload resolution for the choice of f, which is solved thanks to the dummy argument 0, which is an i...
B-Tree vs Hash Table
In MySQL, an index type is a b-tree, and access an element in a b-tree is in logarithmic amortized time O(log(n)) .
5 Answ...
Putting text in top left corner of matplotlib plot
How can I put text in the top left (or top right) corner of a matplotlib figure, e.g. where a top left legend would be, or on top of the plot but in the top left corner? E.g. if it's a plt.scatter(), then something that would be within the square of the scatter, put in the top left most corner.
...
What are the differences between Rust's `String` and `str`?
...tring literal "foo" is a &'static str. The data is hardcoded into the executable and loaded into memory when the program runs.
Inside a heap allocated String: String dereferences to a &str view of the String's data.
On the stack: e.g. the following creates a stack-allocated byte array, and...
How I can I lazily read multiple JSON values from a file/stream in Python?
...ler solution. The secret is to try, fail, and use the information in the exception to parse correctly. The only limitation is the file must be seekable.
def stream_read_json(fn):
import json
start_pos = 0
with open(fn, 'r') as f:
while True:
try:
ob...
Remove .php extension with .htaccess
...ly cannot get this to work. The closest I've come is having it remove the extension, but it points back to the root directory. I want this to just work in the directory that contains the .htaccess file.
...
Remote debugging with Android emulator
...'ve only tried it so far with both). Each subsequent emulator takes the next available even+odd port number tuple (up to around 5580, I think).
For reference, I did the following steps on my local machine:
ssh -NL 5554:localhost:5554 -L 5555:localhost:5555 myuser@remote-server
killall adb; adb d...
Why can't I forward-declare a class in a namespace using double colons?
...ou can't. In C++ language fully-qualified names are only used to refer to existing (i.e. previously declared) entities. They can't be used to introduce new entities.
And you are in fact "reopening" the namespace to declare new entities. If the class Class is later defined as a member of different n...
Catch a thread's exception in the caller thread in Python
...thread_obj.start() returns immediately. The child thread that you spawned executes in its own context, with its own stack. Any exception that occurs there is in the context of the child thread, and it is in its own stack. One way I can think of right now to communicate this information to the parent...