Duncan McGreggor

Duncan McGreggor

LFE co-maintainer. Distributed systems engineer. Lisper on the BEAM. Creator of the Lykn language.

Vigdís — LFE Friday, LiffyBot reaching into a glowing key-value lattice in a Mead-style command room
tutorials

LFE Friday - maps:get/3

Reopening LFE Friday with the safe map read: maps:get/3 hands back a default instead of crashing on a missing key — plus the one eager-evaluation gotcha to know.

June 19, 2026

tutorials

Graph Theory in LFE: A Knowledge Graph of Erlang Itself

A deep, hands-on tour of graph theory in LFE — built on a real corpus of 1,664 Erlang concept cards, driven by the graffeo library, and unfolded slowly enough to teach the mathematics underneath each query.

June 5, 2026

Vigdís — lichen and moss on ancient stone, oil and digital
languages

Lykn: A Lisp Born from LFE

How fourteen years with Lisp Flavoured Erlang led to a new language — and how that language came home to power lfe.io.

June 4, 2026

Vigdís — LFE news, a busy rotating space-station newsroom
announcements

Welcome to the New LFE Blog

After many years on Jekyll, the LFE blog has moved into the same Cobalt-powered home as lfe.io itself. Here's what changed, what stayed, and what we learned along the way.

June 3, 2026

Vigdís — LFE news, a busy rotating space-station newsroom
announcements

lfe.io 5.0: Rust Tooling, All the Way Down

April 20, 2026

Vigdís — LiffyBot at a Docker console, Mead-style server room
tutorials

Running LFE in Docker, Updated

Significant changes have been made to the LFE Docker support of late, least of which is using the official Erlang Docker images as the base.

May 13, 2019

Vigdís — LFE news, a busy rotating space-station newsroom
news

Catch Up

May 13, 2019

Vigdís — LFE tutorial, a retro-futurist study aboard a spaceship
tutorials

LFE and rebar3

March 25, 2016

Vigdís — LFE tutorial, a retro-futurist study aboard a spaceship
tutorials

Update: Running an LFE YAWS app in Docker

Docker LFE/YAWS sample app has been updated

November 28, 2015

Vigdís — LFE, retro-futurist digital painting
interview

An Interview with Robert Virding on Lisp

September 18, 2015

Vigdís — LFE tutorial, a retro-futurist study aboard a spaceship
tutorials

Distributed LFE

September 18, 2015

Vigdís — LFE, retro-futurist digital painting
site

The LFE Blog Has a New Face

First stages of a refresh for all of the LFE web properties ...

September 18, 2015

Vigdís — LFE, retro-futurist digital painting
design

Towards multi-methods in LFE

Exploring the shape of multi-methods in the LFE library LOS

July 11, 2015

Vigdís — LFE tutorial, a retro-futurist study aboard a spaceship
tutorials

FreeBSD & LFE Images: Docker-like functionality with ezjail

July 8, 2015

Vigdís — LFE tutorial, a retro-futurist study aboard a spaceship
tutorials

DragonFly BSD & LFE

July 8, 2015

Vigdís — LFE tutorial, a retro-futurist study aboard a spaceship
tutorials

Creating LFE Servers with OTP, Part II

Taking the LFE gen_server to the next level

May 28, 2015

Vigdís — LFE tutorial, a retro-futurist study aboard a spaceship
tutorials

Creating LFE Servers with OTP, Part I

Creating a generic OTP server in LFE

May 26, 2015

Vigdís — LFE tutorial, a retro-futurist study aboard a spaceship
tutorials

Prelude to OTP

A look at some examples which motivate the use of OTP

May 25, 2015

Vigdís — LFE tutorial, a retro-futurist study aboard a spaceship
tutorials

What is OTP?

A quick examination of OTP

May 24, 2015

Vigdís — LFE tutorial, a retro-futurist study aboard a spaceship
tutorials

New Series: LFE OTP Tutorials

Kicking off a series of OTP tutorials for LFE hackers

May 23, 2015

Vigdís — LFE, retro-futurist digital painting
formalwear

LFE T-shirts: The Great Unboxing

May 23, 2015

Vigdís — LFE tutorial, a retro-futurist study aboard a spaceship
tutorials

ledis: Using Redis from LFE

April 5, 2015

Vigdís — LFE, retro-futurist digital painting
excerpts

The Hidden Origins of Lisp: The Place of Lisp in the 21st Century

March 27, 2015

Vigdís — LFE, retro-futurist digital painting
excerpts

The Hidden Origins of Lisp: John McCarthy

March 26, 2015

Vigdís — LFE, retro-futurist digital painting
excerpts

The Hidden Origins of Lisp: Alonzo Church

March 25, 2015

Vigdís — LFE, retro-futurist digital painting
excerpts

The Hidden Origins of Lisp: Bertrand Russell

March 24, 2015

Vigdís — LFE, retro-futurist digital painting
excerpts

The Hidden Origins of Lisp: Giuseppe Peano

March 23, 2015

Vigdís — LFE, retro-futurist digital painting
excerpts

The Hidden Origins of Lisp: Introduction

March 22, 2015

Vigdís — LFE, retro-futurist digital painting
update

SICP: the LFE Edition - Update

An update on the LFE edition of SICP and a note about the new preface

March 22, 2015

Vigdís — LFE, retro-futurist digital painting
formalwear

New LFE T-Shirt

If you missed the last LFE T-shirt, you're gonna want to be in line for this one ...

March 20, 2015

Vigdís — LFE news, a busy rotating space-station newsroom
announcements

lfetool 1.5.0 Preview: Overriding Version Pinning

Looking for volunteers to test new lfetool feature

January 9, 2015

Vigdís — LFE news, a busy rotating space-station newsroom
announcements

Coming Soon: LFE Friday!

With Steven Proctor's blessing, LFE will be re-publishing Erlang Thursdays...

January 3, 2015

Vigdís — LFE tutorial, a retro-futurist study aboard a spaceship
tutorials

Scientific Computing on the Erlang VM

Polynomial Curve Fitting with LFE

January 1, 2015

Vigdís — LFE news, a busy rotating space-station newsroom
announcements

Easy Python from LFE/Erlang

The quickest way to use Python from LFE/Erlang

December 27, 2014

Vigdís — LFE, retro-futurist digital painting
archaeology

BYTE, August 1979: The LISP Issue

An exploration of the Ancient LISP code on the cover of BYTE, August 1972

December 15, 2014

Vigdís — LFE news, a busy rotating space-station newsroom
announcements

lutil 0.5.0: Composition, Predicates and Core lutil

New features in lutil 0.4.1

December 14, 2014

Vigdís — LFE news, a busy rotating space-station newsroom
announcements

lfest 0.0.2 Is Released

New Version of lfest Available

December 8, 2014

Vigdís — LFE tutorial, a retro-futurist study aboard a spaceship
tutorials

Running LFE in Docker

LFE Community is working on growing support for Docker

December 7, 2014

Vigdís — LFE news, a busy rotating space-station newsroom
announcements

Usability Update: IErlang Notebook (a la IPython)

Updated project source for IErlang makes it easier to use

December 6, 2014

Vigdís — LFE tutorial, a retro-futurist study aboard a spaceship
tutorials

ErlPort and Python Part II: Making More Calls from LFE

Part II of an Introduction to ErlPort with LFE

December 3, 2014

Vigdís — LFE news, a busy rotating space-station newsroom
announcements

Community Generated Content

Readers, submit your PRs for blog posts!

December 3, 2014

Vigdís — LFE tutorial, a retro-futurist study aboard a spaceship
tutorials

ErlPort: Using Python from Erlang/LFE

A Quick Introduction to ErlPort via LFE

November 21, 2014

Vigdís — LFE news, a busy rotating space-station newsroom
announcements

lfetool v1.2 Is Out!

Notes on the latest interim release of lfetool

August 31, 2014

Vigdís — LFE, retro-futurist digital painting
conferences

Erlang @ OSCON 2014

Updates from the conference ground zero

July 23, 2014

Vigdís — LFE, retro-futurist digital painting
update

LFE Language Summit Review

A report on how the first LFE language 'summit' went

June 10, 2014

Vigdís — LFE, retro-futurist digital painting
history

The Secret History of LFE

A post to the mail list too good to just keep there :-)

May 28, 2014

Vigdís — LFE news, a busy rotating space-station newsroom
news

LFE User Group Meeting: Update

We now have a date and time for the User Group meeting in Stockholm!

May 25, 2014

Vigdís — LFE, retro-futurist digital painting
site

Docs Update: History of Erlang Added

Updated the docs site with a new 'History' section.

May 25, 2014

Vigdís — LFE news, a busy rotating space-station newsroom
news

LFE Sunday Times

LFE Daily moved to weekly release

May 23, 2014

Vigdís — LFE, retro-futurist digital painting
site

Docs Site Overhaul

With the new site, docs pages get better focus.

May 23, 2014

Vigdís — LFE, retro-futurist digital painting
site

LFE Microblog is Open for Business ...

Another web property update

May 22, 2014

Vigdís — LFE, retro-futurist digital painting
site

New LFE Site!

LFE has a new main site

May 22, 2014