perl encapsulate single variable in double quotes

Question

In Perl, is there any reason to encapsulate a single variable in double quotes (no concatenation) ?

I often find this in the source of the program I am working on (w

Answer 1

My theory has always been that it's people coming over from other languages with bad habits. It's not that they're thinking "I will use double quotes all the time", but that they're just not thinking!

I'll be honest and say that I used to fall into this trap because I came to Perl from Java, so the muscle memory was there, and just kept firing.

PerlCritic finally got me out of the habit!

It definitely makes your code more efficient, but if you're not thinking about whether or not you want your strings interpolated, you are very likely to make silly mistakes, so I'd go further and say that it's dangerous.