An Experiment in Live Collaborative Programming on the Croquet Shared Experience Platform (PX/22) - ‹Programming› 2022

Mon 11 - Thu 14 April 2022

Who

Yoshiki Ohshima, Aran Lunzer, Jenn Evans, Vanessa Freudenberg, Brian Upton, David Smith

Track

Time Zone

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When

Wed 16 Mar 2022 05:30 - 05:45 at PX Online - PX/22 Chair(s): Luke Church, Richard P. Gabriel, Robert Hirschfeld, Hidehiko Masuhara

Abstract

This paper describes our experiences in building a live collaborative programming environment on top of the JavaScript version of the Croquet shared experience platform.

Croquet provides a clean substrate for building real-time collaborative applications. We created an application framework that supports live programming, and used that framework to build the Greenlight collaborative application, then in turn, modified it to do live programming experiments. The environment allows multiple users to modify the running application from within, with changes taking effect immediately.

The experiment was inspired by earlier work including Douglas Engelbart’s oNLine System (NLS) and the Kansas system in Self. Analogically, the system is like the Smalltalk environment made collaborative.

In this paper we explain the Croquet architecture, its library and framework, and the Greenlight application used to make the live programming environment.

The standard version of Greenlight is available at https://croquet.io/greenlight, and the modified demo system is available at https://croquet.io/scripting.

Yoshiki Ohshima

Croquet Studios

Japan

Aran Lunzer

Croquet Corporation

United Kingdom

Jenn Evans

Vanessa Freudenberg

Croquet Corp

United States

Brian Upton

David Smith

Time Zone

The program is currently displayed in (GMT+01:00) Lisbon.

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The GMT offsets shown reflect the offsets at the moment of the conference.

Time Band

By setting a time band, the program will dim events that are outside this time window. This is useful for (virtual) conferences with a continuous program (with repeated sessions).
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Session Program

Wed 16 Mar
Displayed time zone: Lisbon change

	05:00 - 08:00	PX/22PX/22 at PX Online Chair(s): Luke Church University of Cambridge \| Lund University \| Lark Systems, Richard P. Gabriel Dream Songs, Inc. & HPI, Robert Hirschfeld HPI, University of Potsdam, Hidehiko Masuhara Tokyo Institute of Technology

	05:00 15m Talk		Programming in an fMRI Scanner: A Report from the Field PX/22 Steven Tanimoto University of Washington, Seattle, Rob Thompson , Todd Richards , Cheri Yates , Virginia Berninger
	05:15 15m Talk		let chart = ⊥; let song = ♩; // Embedding Visual Languages in Code PX/22 Elliot Evans Polytope
	05:30 15m Talk		An Experiment in Live Collaborative Programming on the Croquet Shared Experience Platform PX/22 Yoshiki Ohshima Croquet Studios, Aran Lunzer Croquet Corporation, Jenn Evans , Vanessa Freudenberg Croquet Corp, Brian Upton , David Smith
	05:45 15m Talk		Calling Cards: Concrete Visual End-User Programming PX/22 Michael Homer Victoria University of Wellington
	06:00 15m Talk		CodeMap: a Graphical Note-Taking Tool Cooperating with an Integrated Development Environment PX/22 Rikito Taniguchi Tokyo Institute of Technology, Hidehiko Masuhara Tokyo Institute of Technology
	06:15 15m Talk		Toward Understanding Task Complexity in Maintenance-based Studies of Programming Tools PX/22 Patrick Rein Hasso Plattner Institute, Tom Beckmann Hasso Plattner Institute, Toni Mattis Hasso Plattner Institute, University of Potsdam, Robert Hirschfeld HPI, University of Potsdam
	06:30 15m Talk		Example Mining - Assisting Example Creation to Enhance Code Comprehension PX/22 Eva Krebs Hasso Plattner Institute (HPI), University of Potsdam, Germany, Patrick Rein Hasso Plattner Institute, Robert Hirschfeld HPI, University of Potsdam
	06:45 15m Talk		A Live Environment to Improve the Refactoring Experience PX/22 Sara Fernandes FEUP, Universidade do Porto, Ademar Aguiar FEUP, Universidade do Porto, André Restivo LIACC, Universidade do Porto, Porto, Portugal
	07:00 15m Talk		Crosscut — Drawing Dynamic Representations PX/22 Szymon Kaliski , Ivan Reese Ink&Switch, Marcel Goethals Ink&Switch
	07:15 45m Other		Open discussion PX/22