EXCERPT: Christopher Alexander’s forces

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Software design patterns were derived from the work of architect Christopher Alexander, specifically his book A Pattern Language: Towns, Buildings, Construction. This excerpt (from episode 39) addresses a problem: most software people don't know one of Alexander's most important ideas, that of "forces".

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Mentioned (or that I wish I'd found a way to mention)
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By Anneli Salo - Own work, CC BY-SA 3.0, Wikipedia Commons
EXCERPT: Christopher Alexander’s forces
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