Why is processing a sorted array faster than processing an unsorted array?
In this C++ code, sorting the data (before the timed region) makes the primary loop ~6x faster: #include <algorithm> #include <ctime> #include <iostream> int main() { // Generate data const unsigned arraySize = 32768; int data[arraySize]; for (unsigned c = 0; c < arraySize; ++c) data[c] = std::rand() % 256; // !!! With this, the next loop runs faster. std::sort(data, data + arraySize); // Test clo
reStructuredText tool support
Salvaging (and extending) the list from an old version of the Wikipedia page: Documentation Primer Cheat Sheet Quick Reference reStructuredText and Sphinx Reference Implementations Although the reference implementation of reStructuredText is written in Python, there are reStructuredText parsers in other languages too. Python - Docutils The main distribution of reStructuredText is the Python Docuti
Why is reading lines from stdin much slower in C++ than Python?
I wanted to compare reading lines of string input from stdin using Python and C++ and was shocked to see my C++ code run an order of magnitude slower than the equivalent Python code. Since my C++ is rusty and I'm not yet an expert Pythonista, please tell me if I'm doing something wrong or if I'm misunderstanding something. (TLDR answer: include the statement: cin.sync_with_stdio(false) or just use
How to parse template languages in Ragel?
Ragel works fine. You just need to be careful about what you're matching. Your question uses both [[tag]] and {{tag}}, but your example uses [[tag]], so I figure that's what you're trying to treat as special. What you want to do is eat text until you hit an open-bracket. If that bracket is followed by another bracket, then it's time to start eating lowercase characters till you hit a close-bracket
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