How about this for a start?
(reduce
(fn [m line]
(if (empty? line)
m
(if-let [size (get (re-matches #"([0-9]+)
byte\(null\)each:" line) 1)]
(merge m {:size size})
(if-let [file (get (re-matches #".*(\.[0-9a-zA-Z]+)" line) 1)]
(let [size (:size m)]
(merge-with (fn [[cnt size] _] [(inc cnt) size]) m
{file [0 size]}))
(throw (IllegalStateException.
(str "not sure what to do with \"" line "\"")))))))
{}
(line-seq (reader
"/home/windfall/hacking/sharpening-of-the-saw/test-data/test1.in")))
For your sample data, the above produces:
{".sta" [1 "102"], ".UWL" [2 "14171"], ".ini" [1 "71"], :size "102"}
You'll probably need to drop the :size key from the result map,
convert strings to integers, multiply counts by sizes etc. -- I leave
that to you.
All best,
Michał
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