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why functional languages? (here's why)

 
M Easter
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Someone recently asked: why ruby? why functional languages?

Here's a great answer

Without understanding functional programming, you can't invent MapReduce, the algorithm that makes Google so massively scalable. The terms Map and Reduce come from Lisp and functional programming.

http://www.joelonsoftware.com/items/2006/08/01.html
 
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