From: Max Williams <toastkid.williams@...>
Date: 2009-04-14T18:26:36+09:00
Subject: A challenge: generate web colors for tree nodes.

hey all

here's a nice little ruby challenge to welcome everyone back after
easter:

I have a long (about 1100) list of elements (class name Property),
arranged into a tree structure.  I want each node to have its own unique
color, as a web color format string (eg "#112233").  Each has an id, a
parent_id and a name - the color can be generated using any or all of
these, or by some other (consistent) method.

Further requirements:
The color can't be brighter than #aaaaaa.
Properties with the same parent_id should have distinctly different
colors.
The color can be essentially random, but should be consistent - ie if
it's generated using the name then it should only ever change if the
name changes.

I've got a few vague ideas involving SHA1 but i thought i'd throw this
out as a fun ruby task :)  Hopefully i'll post my own idea soon.

cheers
max
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