I’ll chime in that I think Yahoo pipes is a really neat idea. As every decent UNIXhead knows, pipes let you combine small command-line tools easily by routing the output of one tool into the input of another tool. For example “cat census-names | cut -d’,’ -f2 | sort | uniq -c | sort -rg” might take a list of peoples’ names, extract just the last names, sort the list, unique-ify the list and produce a count of how many times each name occurred, then sort by the biggest number.

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