http://www.perlmonks.org?node_id=588674


in reply to Re^4: Cleaner way of looping through a file and stripping only certain lines?
in thread Cleaner way of looping through a file and stripping only certain lines?

Similarly, not using "" around the variables is not specific to open. "$var" creates a new variable which is the string representation of the specified variable. It's almost never needed, and it's often undesireable.

In this case, your variable is already a string, and if it wasn't. If it wasn't, it would get converted to a string automatically.

I can think of two uses for "$var":