i alarmed alien

i alarmed alien has asked 2 questions and find answers to 15 problems.

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transitive reduction algorithm: pseudocode?

i alarmed alien answers

Regex to extract file extension from URL
What version of XPath is implemented in XML::LibXML?
Collapsible graph in D3.JS: Multiple root points
Add event listener per nodes level on d3 chart
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What are the consequences of using percentage for width,height attributes of an img element?
transitive reduction algorithm: pseudocode?
Change color of selected li option with D3/JavaScript
Unit and integration testing in perl using Test::More - how to capture exit call?
Mason methods scope - override