Externally reference ECMAScript in an SVG file
source: Using Internal & External Scripts, [rit.edu]
<script type="text/ecmascript" xlink:href="scripts/changeCircle.js"/>
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Ruby one-liner to find external IP address across NAT router.
Sometimes you just have to know what your external IP address is when there's a NAT between you and the rest of the world. Say you're in a DHCP environment that's constantly changing your IP, for example. This one-liner gives you your IP address as a string (in this case stored as "my_ip").
my_ip = (require 'open-uri' ; open("http://myip.dk") { |f| /([0-9]{1,3}\.){3}[0-9]{1,3}/.match(f.read)[0].to_a[0] })
