/*
Simple filter hook function. Splits the argument by whitespace,
fetches the 2nd element, converts it to an int and returns true
if it s larger than 5, false otherwise.
*/
(defn uselarge [line]
  (cond (> (atoi (second (resplit line `\s+`))) 5) true false))

/* Register the filter hook */
(addhook %filter %uselarge)