Bash - create subfolder in each folder

I recently had to add a subfolder to each folder inside a directory in a directory that had more than 100 folders it was a bit tedious to copy paste the folder inside each one of them.Thankfully this can easily done with a bash command :

cd /opt/myfolder
for f in *; do mkdir "$f/myFolder"; done

Angular6 hiding component selector

It's sometimes useful to have angular's component selector not to be rendered in the page, as sometimes this can cause problems with...