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Showing posts from July 21, 2013

Look for elegance

Check out nomeata's blog post "On taking the last n elements of a list". There's the obvious

takeLast n = (reverse . take n . reverse)

but all that reversing is a lot of work. The temptation is to think imperative and haul out the heavy artillery... but then he realized how it could be done efficiently and idiomatically. I won't put a spoiler here; read the original.