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Is there a max array length limit in C++?
... items than a vector<int> before memory is full. The same counts for raw C-style arrays like int[] and char[].
Additionally, this upper limit may be influenced by the type of allocator used to construct the vector because an allocator is free to manage memory any way it wants. A very odd but ...
What are the different usecases of PNG vs. GIF vs. JPEG vs. SVG?
...images can also be animated and have transparency.
Good for: Logos, line drawings, and other simple images that need to be small. Only really used for websites.
JPEG - Lossy / Direct
JPEGs images were designed to make detailed photographic images as small as possible by removing informati...
What does FETCH_HEAD in Git mean?
...for alternate ref backends, read them from a file generically in refs_read_raw_ref().
With Git 2.29 (Q4 2020), Updates to on-demand fetching code in lazily cloned repositories.
See commit db3c293 (02 Sep 2020), and commit 9dfa8db, commit 7ca3c0a, commit 5c3b801, commit abcb7ee, commit e5b9421, com...
Is there any use for unique_ptr with array?
...or
Note that vector::reserve is not an alternative here: Is accessing the raw pointer after std::vector::reserve safe?
It's the same reason a C programmer might choose malloc over calloc.
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Fastest way to determine if an integer's square root is an integer
... fast convert-to-long function so integer operations can be applied on the raw bytes.
the 0x5f3759df - (i >> 1); line is a pre-calculated seed value for the approximation function.
the * (float*) &i converts the value back to floating point.
the y = y * ( threehalfs - ( x2 * y * y ) ) lin...
How to iterate over rows in a DataFrame in Pandas
...n make arbitrarily complex things work through the simplicity and speed of raw Python code.
Caveats
List comprehensions assume that your data is easy to work with - what that means is your data types are consistent and you don't have NaNs, but this cannot always be guaranteed.
The first one is more...
A non-blocking read on a subprocess.PIPE in Python
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Absolutely brilliant. Much easier than the raw subprocess module. Works perfectly for me on Ubuntu.
– Cerin
Dec 2 '10 at 12:30
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Using arrays or std::vectors in C++, what's the performance gap?
... a std::array.
Uninitialized memory
Sometimes, using a vector instead of a raw buffer incurs a visible cost because the vector will initialize the buffer at construction, while the code it replaces didn't, as remarked bernie by in his answer.
If this is the case, then you can handle it by using a un...
Why use AJAX when WebSockets is available?
...lelism, error handling, etc). Regarding performance, although from-scratch raw large file transfer speed would be similar, browsers have had years to finely tune caching of web content (much of which applies to AJAX requests) so in practice, switching from AJAX to WebSockets is unlikely to provide m...
When is std::weak_ptr useful?
...tr is a very good way to solve the dangling pointer problem. By just using raw pointers it is impossible to know if the referenced data has been deallocated or not. Instead, by letting a std::shared_ptr manage the data, and supplying std::weak_ptr to users of the data, the users can check validity o...