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RE2 is a fast, safe, thread-friendly alternative to backtracking regular expression engines like those used in PCRE, Perl, and Python. It is a C++ library.

Expression language and expression evaluation for Go

  • configuration-language
  • expression
  • evaluator
  • go

A vi-like editor based on Plan 9's structural regular expressions

  • text-editor
  • structural-regex
  • modal-editing
  • console-application

Fast, portable, non-Turing complete expression evaluation with gradual typing (Go)

  • golang
  • go
  • cel
  • expression

Trigger functions or evaluate cron expressions in JavaScript or TypeScript. No dependencies. Most features. Node. Deno. Bun. Browser.

  • cron
  • scheduling
  • crontab
  • crontab-syntax

Fast numerical array expression evaluator for Python, NumPy, Pandas, PyTables and more

An open source library for creative expression on the web, desktop, mobile and consoles. Inspired by the classic Flash and AIR APIs.

  • adobe-air
  • adobe-flash
  • cross-platform
  • flash

A set of pure Lua libraries focusing on input data handling (such as reading configuration files), functional programming (such as map, reduce, placeholder expressions,etc), and OS path management. Much of the functionality is inspired by the Python standard libraries.

  • lua
  • luajit
  • penlight
  • lua-library

tiny recursive descent expression parser, compiler, and evaluation engine for math expressions

  • c
  • calculator
  • expression-evaluator
  • math