I have a file with 3 columns like this
Col1 Col2 Col3 A B <- C D -> E F ->
I want to swap the entries of the Col1 and Col2 whenever there is
<-
in the third column. I want my output file to be like
Col1 Col2 Col3 B A -> C D -> E F ->
Advertisement
Answer
awk '($3=="<-"){$3=$2;$2=$1;$1=$3;$3="->"}1' <file>
Essentially, if $3=="<-"
, then swap the columns and redefine $3
. Then print.