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dyoder/fun-with-do.coffee

Created November 27, 2012 00:44
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Using do to create a rich function
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fun-with-do.coffee
# None of the various "private" functions or data structures used by our robot function are exposed.
# The function just magically returns a robot for the given host.
robot = do ->
_makeRobot = require "robotstxt"
_userAgent = "Mozilla/5.0 (compatible; Googlebot/2.1)"
robots = {}
(host) -> robots[host] ?= _makeRobot "http://#{host}/robots.txt", _userAgent
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