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# histsort.awk --- compact a shell history file
# Thanks to Byron Rakitzis for the general idea
#
# Arnold Robbins, arnold@skeeve.com, Public Domain
# May 1993
{
if (data[$0]++ == 0)
lines[++count] = $0
}
END {
for (i = 1; i <= count; i++)
print lines[i]
}