[SOLVED] How to replace consecutive symbols using only one sed command?

Issue

I have a simple .csv file with lines that holds 't' values. Here is the example:

2ABC;t;t;t;tortuga;fault;t;t;bored

I want to replace them to '1' using sed.

If I make sed "s/;t;/;1;/g" I get the next result:

2ABC;1;t;1;tortuga;fault;1;t;bored

As you can see, consecutive ';t;' have been replaced through one. Yes, I can replace all ';t;' by sed -e "s/;t;/;1;/g" -e "s/;t;/;1;/g" but this is boring.

How can I make the replacement by one sed command?

Solution

If there is something to replace, branch to replace again.

sed ': again; /;t;/{ s//;1;/; b again }'

Overall, parsing cvs with sed is crude. Consider awk.

awk -F';' -v OFS=';' '{ for(i=1;i<=NF;++i) if ($i=="t") $i=1 } 1'

Answered By - KamilCuk

Answer Checked By - Timothy Miller (WPSolving Admin)