#               Example 3

#!/bin/sed -f
# swap.sed
#
# sed: swap first two fields in a line of tab-delimited fields
#
# Run this program with the command
#
#   sed -f swap.sed swap.txt
#
# where swap.txt is an input file with tab-delimited fields

s/^\([^	]*\)	\([^	]*\)/\2	\1/

#   Note - each blank is actually a single hard tab "\t"
#       s/^\([^\t]*\)\t\([^\t]*\)/\2\t\1/
