source: trunk/essentials/sys-apps/gawk/test/longwrds.awk

# From Gawk Manual modified by bug fix and removal of punctuation

# Invoker can customize sort command if necessary.
BEGIN {
        if (!SORT) SORT = "LC_ALL=C sort"
}

# Record every word which is used at least once
{
        for (i = 1; i <= NF; i++) {
                tmp = tolower($i)
                if (0 != (pos = match(tmp, /([a-z]|-)+/)))
                        used[substr(tmp, pos, RLENGTH)] = 1
        }
}

#Find a number of distinct words longer than 10 characters
END {
        num_long_words = 0
        for (x in used) 
                if (length(x) > 10) {
                        ++num_long_words
                        print x | SORT
                }
        print(num_long_words, "long words") | SORT
        close(SORT)
}