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Regular Expression Engine Comparison Chart

Many different applications claim to support regular expressions. But what does that even mean?

Well there are lots of different regular expression engines, and they all have different feature sets and different time-space efficiencies.

The information here is just copied from: http://regular-expressions.mobi/refflavors.html

Running Hashcat on Google Cloud's GPU-based VMs

In February 2017, Google announced the availability GPU-based VMs. I spun up a few of these instances, and ran some benchmarks. Along the way, I wrote down the steps taken to provision these VM instances, and install relevant drivers.

Update April 2019: Updated instructions to use instances with the Tesla T4 GPUs.

Copy ChatGPT as Markdown

Copies ChatGPT responses as raw Markdown.

This script can be pased directly in your JavaScript console when on ChatGPT, or pasted to a script in tampermonkey.

It adds a little copy button next to the replies.

AI Coding Agent Guidelines (claude.md)

These rules define how an AI coding agent should plan, execute, verify, communicate, and recover when working in a real codebase. Optimize for correctness, minimalism, and developer experience.

Operating Principles (Non-Negotiable)

Correctness over cleverness: Prefer boring, readable solutions that are easy to maintain.
Smallest change that works: Minimize blast radius; don't refactor adjacent code unless it meaningfully reduces risk or complexity.

	'use strict';

	/**
	* Basic code to parse the values in the "data" attribute in a Google Maps URL to an Array.
	* There will likely still be some work to do to interpret the resulting Array.
	*
	* Based on information from:
	* http://stackoverflow.com/a/34275131/1852838
	* http://stackoverflow.com/a/24662610/1852838
	*/

	# SPECIFIC: Block #submit #validate #process #pre_render #post_render #element_validate #after_build #value_callback parameters

	SecRule REQUEST_FILENAME "(index\.php\|\/$)" "chain,id:003294,t:lowercase,t:none,t:utf8toUnicode,t:urlDecodeUni,t:urldecode,block"
	SecRule REQUEST_METHOD "^(GET\|POST\|HEAD)$" chain
	SecRule ARGS_NAMES\|REQUEST_COOKIES_NAMES "^\#(submit\|validate\|pre_render\|post_render\|element_validate\|after_build\|value_callback\|process)$\|\[(?:\'\|\")?#(submit\|validate\|pre_render\|post_render\|element_validate\|after_build\|value_callback\|process)"

	# GENERIC: Block all parameters starting with #

	SecRule REQUEST_FILENAME "(index\.php\|\/$)" "chain,id:003309,t:lowercase,t:none,t:utf8toUnicode,t:urlDecodeUni,t:urldecode,block"
	SecRule REQUEST_METHOD "^(GET\|POST\|HEAD)$" chain