Parsing a Reverse Polish Expression
Parsing a Reverse Polish Expression launched on May 21, 2022 with 41 votes, #816 of 2,942 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 4 years on.
In plain words
Parsing a Reverse Polish Expression is a tool for evaluating mathematical expressions written in reverse Polish notation, where operators follow their operands rather than preceding them. It is designed for users who need to process or understand RPN-format calculations, commonly used in some calculators and programming contexts. The tool takes RPN input and produces computed results.
written from the facts on this page · September 2026
Does a similar job
all alternatives →
Transductive regular expressions for text editing2025 · github.com · ▲263An extension of regular expressions for text editing, with a grep-like command-line tool. If you, like me, struggle with group logic in regular expressions, you might find it useful. I wanted to do this for a very long time. It is more of a sketch or prototype. I'd really appreciate your feedback!
Using Parsing Expression Grammars to rewrite source code2016 · github.com · ▲63An example of PEG usage. Contribute to sebcat/move-literals development by creating an account on GitHub.
- CDClojure DSL for pattern-matching, parsing and generic programming2012 · scattered-thoughts.net · ▲204
Cronexpr, a Rust library to parse and iter crontab expression2024 · docs.rs · ▲160`cronexpr` is a library to parse and drive the crontab expression.
More life & fun this month
the category →
A free city-building game in your browser. You are the mayor. You know what the city needs. Now get it past the zoning board, the neighbors, the appeals court and the next election.
Life & fun · 3d ago · permit.petercai.com
- IV
Life & fun · 15d ago · tanzaniaeducationproject.org
Turn a phone, tablet or TV into a sign. Type a message and it fills the screen: welcome signs, timers, Wi-Fi passwords and more. No app, no account, free.
Life & fun · 16d ago · bigwords.page
Play a free virtual guitar online with your keyboard or by touch. Slow songs down and see every chord, string and strum. Acoustic, classic, electric and bass.
Life & fun · 9d ago · guitoro.com
Carrier settings from iPhone, Pixel and Galaxy firmware, decoded and compared: APNs, VoLTE, 5G and Wi-Fi Calling per carrier, and what each build changed.
Life & fun · 14d ago · carrierexplode.com
Life & fun · 23d ago · space.bl2.net
Source: Show HN post ↗
Launched alongside, May 2022
the whole month →
Peerlist▲1,049A professional network w/ robust work profiles at its core
Life & fun · 2022 · peerlist.io
Switchboard▲768Hey HN this is Daniel, I'm excited to share Airtop with the community! Airtop enables AI agents to seamlessly browse and automate any website — even ones with complex authentication like MFA or OAuth. Whether you need to scrape, interact with dynamic content, or automate tasks across multiple browsers, Airtop's cloud-based infrastructure makes it scalable and accessible. Why Airtop? — AI-Driven Web Automation: Automate interactions with any site through natural language commands even if they include human-in-the-loop scenarios. — Authentication Ready: Airtop handles websites requiring…
Work · 2022 · airtop.ai
Automagically reverse-engineer REST APIs via capturing traffic - alufers/mitmproxy2swagger
Growth · 2022 · github.com
