regular expression: put $ in [ ]

Question

echo \"tests\"|perl -pe \"s/s[t$]//g\"
Unmatched [ in regex; marked by <-- HERE in m/s[ <-- HERE 5.020000/ at -e line 1, <> line 1.

Can\'t

Answer 1

You have to escape the $ sign, because it is a special character:

echo "tests"|perl -pe "s/s[t\\$]//g"