NoFlo - Flow-Based Programming for Node.js

Oct 15, 201110 likes5,634 views

Flow-based programming is a programming paradigm that defines applications as networks of black-box processes that exchange data through message passing. These processes can be reconnected without internal changes to form different applications. Flow-based programming was invented in the 1970s and has been used continuously in a major bank since. The paradigm promotes writing programs as text streams that communicate, following the Unix philosophy. Flow-based programming can be used in Node.js apps through the NoFlo library, which allows specifying flows as a DSL and running flows in a web-based interface or for integration with external systems.

http://bergie.iki.fi
henri.bergius@iki.fi

@bergie

Visualized connections between
components

Flow-based programming

“Flow-based programming (FBP) is a programming
paradigm that defines applications as networks of 'black
box' processes, which exchange data across predefined
connections by message passing, where the connections
are specified externally to the processes. These black
box processes can be reconnected endlessly to form
different applications without having to be changed
internally. FBP is thus naturally component-oriented.”
- Wikipedia

“Flow-Based Programming was invented by
John Paul Morrison [from IBM] in the early
1970s, and an early implementation of this
technology has been in continuous production
use at a major Canadian bank since that time.”
- Wikipedia

“This is the Unix philosophy: Write programs
that do one thing and do it well. Write
programs to work together. Write programs
to handle text streams, because that is a
universal interface.”
- Doug McIlroy

“I thought of objects being like biological
cells and/or individual computers on a
network, only able to communicate with
messages (so messaging came at the very
beginning -- it took a while to see how to do
messaging in a programming language
efficiently enough to be useful).”
- Alan Kay

NoFlo - Flow-Based Programming for Node.js

send options 'a, u & x' to command 'ps',
send option 'firefox' to command 'grep'
direct standard output of 'ps' to 'grep'

DSL for specifying flows

send string 'package.json' to source port of Read
send output of Read to Split (by lines)
send output of Split to Count
send output of Count to Display

NoFlo in integration

email External
partners
CouchDB
+
CouchApp
Project NoFlo
Controller
External
systems

github.com/iks/proggis

NoFlo in integration

github.com/iks/proggis

What happens next?
●
Web-based drawing ●
Hook.io support
●
Web-based ●
Component loading
monitoring & debug from NPM

Flow-Based Programming, the book

amzn.com/1451542321

Flow-Based Programming for Node.js

github.com/bergie/noflo

github.com/bergie/noflo

Screenshot: github.com, couple of weeks ago

This document provides an overview of flow-based programming (FBP). FBP is a programming paradigm where applications are defined as networks of black box processes that exchange data through predefined connections. These connections can be redefined without changing the internal processes, allowing for endless reconfiguration. FBP was invented in the 1960s and has seen a resurgence of interest with tools like NoFlo that allow building distributed applications as connected processes. The document discusses several open source FBP implementations and frameworks and provides examples of how FBP has been used to build applications and bioinformatics libraries.

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Ensuring robust, reliable, and repeatable delivery processes is more critical than ever - it's a success factor for your automations and for automation programmes as a whole. In this session, we’ll dive into modern best practices for release management and explore how tools like the UiPathCLI can streamline your CI/CD pipelines. Whether you’re just starting with automation or scaling enterprise-grade deployments, our event promises to deliver helpful insights to you. This topic is relevant for both on-premise and cloud users - as well as for automation developers and software testers alike. 📕 Agenda: - Best Practices for Release Management - What it is and why it matters - UiPath Build Pipelines Deep Dive - Exploring CI/CD workflows, the UiPathCLI and showcasing scenarios for both on-premise and cloud - Discussion, Q&A 👨‍🏫 Speakers Roman Tobler, CEO@ Routinuum Johans Brink, CTO@ MvR Digital Workforce We look forward to bringing best practices and showcasing build pipelines to you - and to having interesting discussions on this important topic! If you have any questions or inputs prior to the event, don't hesitate to reach out to us. This event streamed live on May 27, 16:00 pm CET. Check out all our upcoming UiPath Community sessions at: 👉 https://community.uipath.com/events/ Join UiPath Community Zurich chapter: 👉 https://community.uipath.com/zurich/

Build your own NES Emulator... with KotlinArtur Skowroński

For those who have ever wanted to recreate classic games, this presentation covers my five-year journey to build a NES emulator in Kotlin. Starting from scratch in 2020 (you can probably guess why), I’ll share the challenges posed by the architecture of old hardware, performance optimization (surprise, surprise), and the difficulties of emulating sound. I’ll also highlight which Kotlin features shine (and why concurrency isn’t one of them). This high-level overview will walk through each step of the process—from reading ROM formats to where GPT can help, though it won’t write the code for us just yet. We’ll wrap up by launching Mario on the emulator (hopefully without a call from Nintendo).

With Claude 4, Anthropic redefines AI capabilities, effectively unleashing a ...SOFTTECHHUB

Maxx nft market place new generation nft marketing placeusersalmanrazdelhi

PREFACE OF MAXXNFT MaxxNFT: Powering the Future of Digital Ownership MaxxNFT is a cutting-edge Web3 platform designed to revolutionize how digital assets are owned, traded, and valued. Positioned at the forefront of the NFT movement, MaxxNFT views NFTs not just as collectibles, but as the next generation of internet equity—unique, verifiable digital assets that unlock new possibilities for creators, investors, and everyday users alike. Through strategic integrations with OKT Chain and OKX Web3, MaxxNFT enables seamless cross-chain NFT trading, improved liquidity, and enhanced user accessibility. These collaborations make it easier than ever to participate in the NFT ecosystem while expanding the platform’s global reach. With a focus on innovation, user rewards, and inclusive financial growth, MaxxNFT offers multiple income streams—from referral bonuses to liquidity incentives—creating a vibrant community-driven economy. Whether you ' re minting your first NFT or building a digital asset portfolio, MaxxNFT empowers you to participate in the future of decentralized value exchange. https://maxxnft.xyz/

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Slides for my "Multistream support in the Janus SIP and NoSIP plugins" presentation at the OpenSIPS Summit 2025 event. They describe my efforts refactoring the Janus SIP and NoSIP plugins to allow for the gatewaying of an arbitrary number of audio/video streams per call (thus breaking the current 1-audio/1-video limitation), plus some additional considerations on what this could mean when dealing with application protocols negotiated via SIP as well.

State-Dependent Conformal Perception Bounds for Neuro-Symbolic Verification o...Ivan Ruchkin

A poster presented by Thomas Waite and Radoslav Ivanov at the 2nd International Conference on Neuro-symbolic Systems (NeuS) in May 2025. Paper: https://arxiv.org/abs/2502.21308 Abstract: It remains a challenge to provide safety guarantees for autonomous systems with neural perception and control. A typical approach obtains symbolic bounds on perception error (e.g., using conformal prediction) and performs verification under these bounds. However, these bounds can lead to drastic conservatism in the resulting end-to-end safety guarantee. This paper proposes an approach to synthesize symbolic perception error bounds that serve as an optimal interface between perception performance and control verification. The key idea is to consider our error bounds to be heteroskedastic with respect to the system's state -- not time like in previous approaches. These bounds can be obtained with two gradient-free optimization algorithms. We demonstrate that our bounds lead to tighter safety guarantees than the state-of-the-art in a case study on a mountain car.

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Gihbli AI and Geo sitution |use/misuse of Ai Technologyzainkhurram1111

UiPath Community Zurich: Release Management and Build PipelinesUiPathCommunity

Build your own NES Emulator... with KotlinArtur Skowroński

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State-Dependent Conformal Perception Bounds for Neuro-Symbolic Verification o...Ivan Ruchkin

NoFlo - Flow-Based Programming for Node.js

1. Flow-Based Programming for Node.js

2. http://bergie.iki.fi [email protected] @bergie

3. Call-Return

4. Continuation-Passing Style

5. JavaScript, the Ugly Parts

6. Promises

7. Hooks

8. How to make your code manageable?

9. Clean separation of concerns

10. Visualized connections between components

11. Flow-based programming “Flow-based programming (FBP) is a programming paradigm that defines applications as networks of 'black box' processes, which exchange data across predefined connections by message passing, where the connections are specified externally to the processes. These black box processes can be reconnected endlessly to form different applications without having to be changed internally. FBP is thus naturally component-oriented.” - Wikipedia

12. Flow-based programming

13. “Flow-Based Programming was invented by John Paul Morrison [from IBM] in the early 1970s, and an early implementation of this technology has been in continuous production use at a major Canadian bank since that time.” - Wikipedia

14. Software archeology?

15. “This is the Unix philosophy: Write programs that do one thing and do it well. Write programs to work together. Write programs to handle text streams, because that is a universal interface.” - Doug McIlroy

16. “I thought of objects being like biological cells and/or individual computers on a network, only able to communicate with messages (so messaging came at the very beginning -- it took a while to see how to do messaging in a programming language efficiently enough to be useful).” - Alan Kay

18. send options 'a, u & x' to command 'ps', send option 'firefox' to command 'grep' direct standard output of 'ps' to 'grep'

19. NoFlo components

20. Using NoFlo in your Node.js app

21. Using NoFlo in your Node.js app

22. DSL for specifying flows

23. DSL for specifying flows send string 'package.json' to source port of Read send output of Read to Split (by lines) send output of Split to Count send output of Count to Display

24. NoFlo shell

25. NoFlo in integration email External partners CouchDB + CouchApp Project NoFlo Controller External systems github.com/iks/proggis

26. NoFlo in integration github.com/iks/proggis

27. NoFlo in real world

28. What happens next? ● Web-based drawing ● Hook.io support ● Web-based ● Component loading monitoring & debug from NPM

29. Flow-Based Programming, the book amzn.com/1451542321

30. Flow-Based Programming for Node.js github.com/bergie/noflo

31. github.com/bergie/noflo Screenshot: github.com, couple of weeks ago

NoFlo - Flow-Based Programming for Node.js

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