Hi Doru,
I've been observing how the graph support in Moose has been developing.
We in IBM Research have implemented a full Pharo implementation of the TinkerPop Blueprints property graph de-facto standard http://www.tinkerpop.com .
I am also completing a Pharo-binding for the Gremlin graph traversal language that I call Glider (What you get when you cross a Gremlin and a Mouse). Its very compact and a bit weird syntactically, but its very powerful. Smells kinda like APL for graphs.
If the community is interested, we could go through the IBM Open Source clearance process in the new year and see if we can contribute.
Regards,
Sam

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Tudor Girba ---12/11/2013 10:22:50 AM---Hi, I put together a little implementation for traversals. It is inspired by an

From: Tudor Girba <tudor@tudorgirba.com>
To: moose-dev <moose-dev@iam.unibe.ch>, Discusses Development of Pharo <pharo-dev@lists.pharo.org>
Date: 12/11/2013 10:22 AM
Subject: [Moose-dev] [ANN] traversal-enabled objects with DeepTraverser
Sent by: moose-dev-bounces@iam.unibe.ch

Hi,

I put together a little implementation for traversals. It is inspired by an original implementation from Mariano. Using DeepTraverser, you can traverse arbitrary graphs by describing the traversal and by specifying the actions you want to perform on the nodes and relations.

The code is available in the Moose image as part of the MooseAlgos subproject, but can also be loaded separately in a Pharo image via:

Gofer new
url: 'http://www.smalltalkhub.com/mc/Moose/DeepTraverser/main';
package: ‘ConfigurationOfDeepTraverser’;
load.
(Smalltalk globals at: #ConfigurationOfDeepTraverser) loadDevelopment.

Just to give you an idea, here are some representative examples:

Number
deep: #subclasses
do: [:each | Transcript show: each; cr].

Number deepCollect: #subclasses.

Number
deep: #subclasses
collect: #name.

Number
deep: #subclasses
do: [:each | Transcript show: each; cr]
relationDo: [ :from :to | Transcript show: from; show: ' <-- '; show: to; cr ].

More details about the usages and a little description of the implementation can be found here:
http://www.humane-assessment.com/blog/traversal-enabled-pharo-objects/

Cheers,
Doru

--
www.tudorgirba.com

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