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Old 07-03-2009
vgersh99's Avatar
vgersh99 vgersh99 is offline Forum Staff  
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Join Date: Feb 2005
Location: Boston, MA
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nawk -f an.awk myFile

an.awk:

Code:
{idx1=$1 OFS $2; idx2=$2 OFS $1}
{a[(idx2 in a)?idx2:idx1]++}
END { for (i in a) print i, a[i] }