Search Results for "regular expressions"
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Showing 300 open source projects for "regular expressions"
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Learn Python Regular Expressions
Learn Python Regular Expressions step by step
Understanding Python Regular Expressions is an example-driven guide that teaches regex from beginner concepts through advanced pattern techniques. It primarily covers Python’s standard re module while also introducing the third-party regex package. Early chapters explain anchors, alternation, grouping, escaping, character classes, and quantifiers. Later material explores backreferences, lookarounds, flags, Unicode, common tasks, debugging, and regex pitfalls. -
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sd
Intuitive find & replace CLI (sed alternative)
sd is an intuitive find-and-replace CLI. Painless regular expressions. sd uses regex syntax that you already know from JavaScript and Python. Forget about dealing with quirks of sed or awk - get productive immediately. Non-regex find & replace. No more backslashes or remembering which characters are special and need to be escaped. Find & replace expressions are split up, which makes them easy to read and write. -
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Melody
Melody is a language that compiles to regular expressions
Melody is a language that compiles to regular expressions and aims to be more easily readable and maintainable. All quantifiers can be preceded by lazy to match the least amount of characters rather than the most characters (greedy). -
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RE2/J
linear time regular expression matching in Java
...This makes RE2/J ideal for applications that must handle user-supplied regular expressions securely without the risk of denial-of-service through regex backtracking. While it omits some advanced features like backreferences and certain Java regex options, it supports the vast majority of practical expressions used in production code. RE2/J thus provides a reliable, safe, and scalable alternative for developers. -
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re2
Alternative to backtracking regular expression engines
...In POSIX mode, RE2 accepts standard POSIX (egrep) syntax regular expressions. In Perl mode, RE2 accepts most Perl operators. The only excluded ones are those that require backtracking (and its potential for exponential runtime) to implement. These include backreferences (submatching is still okay) and generalized assertions. The Syntax page documents the supported Perl-mode syntax in detail. -
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grex
A command-line tool and library for generating regular expressions
grex is a library as well as a command-line utility that is meant to simplify the often complicated and tedious task of creating regular expressions. It does so by automatically generating a single regular expression from user-provided test cases. The resulting expression is guaranteed to match the test cases which it was generated from. This project has started as a Rust port of the JavaScript tool regexgen written by Devon Govett. Although a lot of further useful features could be added to it, its development was apparently ceased several years ago. ... -
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Dgraph
The Only Native GraphQL Database With A Graph Backend
...Dgraph is able to do things that other graph DBs can’t. It provides consistent replication, automatic data movement for shard balancing, distributed ACID transactions, as well as native support for full text search, regular expressions and geo search. If you have over 10 SQL tables interconnected via foreign keys, or sparse data that don’t fit neatly into SQL tables; or if you just want a simple and flexible schema, and prioritize speed and performance at scale, Dgraph is the best choice for you. It’s fully equipped with everything you need and more. -
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Fluent Reader
Modern desktop RSS reader built with Electron, React, and Fluent UI
...Does Source only come with snippets? Configure to load full content with Mercury Parser, load webpage in the app, or open externally by default. Find anything you want with the power of regular expressions. Search in both titles and full contents of articles. Mark articles as starred, hidden, or unread and filter as they arrive with custom rules based on regular expressions. -
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uBlacklist
Blocks specific sites from appearing in Google search results
uBlacklist is a Google Search filter for Chrome and Firefox. uBlacklist requires many site permissions on install. They are necessary to support all domains where Google Search is provided (google.com, google.ac, google.ad, ...). You can install uBlacklist from Chrome Web Store, Firefox Add-ons or Mac App Store. To block a site that you are looking at from appearing on the search result page, click the toolbar icon. A "Block this site" dialog will be shown. In recent versions of Chrome, the... -
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Outlines
Structured Outputs
...Instead of repairing malformed responses afterward, it constrains generation to match a requested type or format. Developers can require predefined choices, primitive Python types, Pydantic models, JSON schemas, regular expressions, function signatures, or custom grammars. The same interface works with local models, inference servers, and hosted APIs from several providers. Supported integrations include Transformers, llama.cpp, vLLM, Ollama, OpenAI, and Gemini. It also provides reusable prompt templates and application abstractions for packaging prompts with output constraints. ... -
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Scrapy
A fast, high-level web crawling and web scraping framework
Scrapy is a fast, open source, high-level framework for crawling websites and extracting structured data from these websites. Portable and written in Python, it can run on Windows, Linux, macOS and BSD. Scrapy is powerful, fast and simple, and also easily extensible. Simply write the rules to extract the data, and add new functionality if you wish without having to touch the core. Scrapy does the rest, and can be used in a number of applications. It can be used for data mining, monitoring... -
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find-my-way
A crazy fast HTTP router
...You can set a custom length for parameters in parametric (standard, regex and multi) routes by using maxParamLength option, the default value is 100 characters. If you are using a regex-based route, find-my-way will throw an error if detects potentially catastrophic exponential-time regular expressions (internally uses safe-regex2). According to RFC3986, find-my-way is case-sensitive by default. You can disable this by setting the caseSensitive option to false: in that case, all paths will be matched as lowercase, but the route parameters or wildcards will maintain their original letter casing. -
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Ace Editor
Ace (Ajax.org Cloud9 Editor)
Ace is an embeddable code editor written in JavaScript. It matches the features and performance of native editors such as Sublime, Vim and TextMate. It can be easily embedded in any web page and JavaScript application. Ace is maintained as the primary editor for Cloud9 IDE and is the successor of the Mozilla Skywriter (Bespin) project. -
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Apache Log4j
Apache Log4j 2 is a versatile, feature-rich, efficient logging API
Apache Log4j is a versatile, industrial-grade Java logging framework composed of an API, its implementation, and components to assist the deployment for various use cases. Log4j is used by 8% of the Maven ecosystem and listed as one of the top 100 critical open source software projects. The project is actively maintained by a team of several volunteers and supported by a big community. -
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ecode
Lightweight multi-platform code editor designed for modern hardware
ecode is a lightweight multi-platform code editor designed for modern hardware with a focus on responsiveness and performance. It has been developed with the hardware-accelerated eepp GUI, which provides the core technology for the editor. The project comes as the first serious project using the eepp GUI, and it's currently being developed to improve the eepp GUI library as part of one of its main objectives. -
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PDF4QT
Open source PDF editor
...Basic browsing and lots of other functionalities, such as encryption, reading a document, verification of digital signatures, editing of annotations, searching for text using regular expressions, drawing pages into an image, and much more. Several plug-ins are available. -
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Guidance
A guidance language for controlling large language models
Guidance is an efficient programming paradigm for steering language models. With Guidance, you can control how output is structured and get high-quality output for your use case—while reducing latency and cost vs. conventional prompting or fine-tuning. It allows users to constrain generation (e.g. with regex and CFGs) as well as to interleave control (conditionals, loops, tool use) and generation seamlessly. -
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Automa.jl
A julia code generator for regular expressions
Automa is a regex-to-Julia compiler. By compiling regex to Julia code in the form of Expr objects, Automa provides facilities to create efficient and robust regex-based lexers, tokenizers and parsers using Julia's metaprogramming capabilities. You can view Automa as a regex engine that can insert arbitrary Julia code into its input-matching process, which will be executed when certain parts of the regex match an input. -
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JavaCore
JavaCore is a summary of experience with Java core technologies
...It begins with syntax, data types, object-oriented programming, methods, arrays, exceptions, generics, reflection, annotations, and strings. Advanced material covers regular expressions, encoding, encryption, internationalization, Java 8 features, and the service provider interface. Separate sections explain collections, streams, traditional I/O, NIO, serialization, sockets, and networking. Its concurrency coverage includes threads, locks, atomics, thread pools, concurrent containers, synchronization, and the Java Memory Model. ... -
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FSearch
A fast file search utility for Unix-like systems based on GTK3
...It achieves its high performance by indexing the filesystem and updating that index in real time, so as you create, rename, or delete files the results stay up to date without noticeable lag. The intuitive user interface supports incremental search — where results filter as you type — plus features like regular expressions, case-sensitivity options, and customizable indexing scopes, making it both powerful and accessible. Designed with GTK and written in C, it integrates nicely with desktop environments like GNOME, XFCE, and Cinnamon while still being lightweight and resource-efficient. Developers and power users appreciate FSearch for dramatically reducing the time it takes to find files compared to traditional search tools, especially on large partitions. -
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Quod Libet
Music player and music library manager for Linux, Windows, and macOS
...Quod Libet is a GTK+-based audio player written in Python, using the Mutagen tagging library. It’s designed around the idea that you know how to organize your music better than we do. It lets you make playlists based on regular expressions (don’t worry, regular searches work too). It lets you display and edit any tags you want in the file, for all the file formats it supports. Unlike some, Quod Libet will scale to libraries with tens of thousands of songs. It also supports most of the features you’d expect from a modern media player. -
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Python-programming-exercises
100+ Python challenging programming exercises
...It is designed to help learners practice problem solving through short exercises rather than full applications. The exercises cover fundamentals such as strings, numbers, loops, lists, dictionaries, functions, regular expressions, file handling, classes, generators, and algorithmic thinking. Many problems include both a prompt and a suggested solution, making the repository useful for self-study and interview-style practice. The project is especially helpful for beginners who already know basic syntax and want structured repetition. It can also serve as a compact reference for instructors or mentors who need practical Python exercises. -
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Cariddi
Take a list of domains, crawl urls and scan for endpoints, secrets
...It accepts one or many domains and recursively explores reachable URLs. During crawling, it can identify interesting endpoints, file extensions, tokens, secrets, API keys, and other potentially sensitive patterns. Custom regular expressions let researchers extend secret detection for organization-specific data. Concurrency, delays, timeouts, caching, user-agent controls, and proxy support provide control over how requests are made. Results can be printed directly or written to text and HTML outputs. The tool is mainly intended for bug bounty, reconnaissance, and defensive web-security workflows where broad content discovery is useful. -
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npm-check-updates
Find newer versions of package dependencies
...Filter packages using the --filter option or adding additional cli arguments. You can exclude specific packages with the --reject option or prefixing a filter with !. Supports strings, wildcards, globs, comma-or-space-delimited lists, and regular expressions. Direct dependencies are updated to the latest stable version. -
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learn_python3_spider
Python crawler tutorial series, learning Python crawlers from 0 to 1
...It introduces request capture, browser and mobile traffic inspection, and core scraping libraries such as Requests, BeautifulSoup, Selenium, Appium, and Scrapy. Lessons also cover JSON parsing, regular expressions, concurrency, proxy usage, login handling, and CAPTCHA-related techniques. Data can be stored with CSV, MySQL, or MongoDB examples. More advanced material explores anti-scraping defenses, JavaScript analysis, WebSocket data, and distributed crawlers. The repository includes practical source-code examples for scraping several real-world websites and services.
