meaning of if ($file !~ /\.tar(\.gz)?$/)

[filipebean]

Hi all,

can you please help me to understand the full meaning of the condition:

 if ($file !~ /\.tar(\.gz)?$/)

does it mean: if $file diferent of .tar or .gz do...

thank you in advance

best regards.

[hdb]

Matches all $file except .tar and .tar.gz endings.

if ( $file !~    # scalar $file tested for not matching
          /\.tar     # an ending of .tar
                  (\.gz)?   # followed by an optional .gz
                       $    # at the end of the name
               /x)

[filipebean]

Hi,

thank you, your answer is clear.

it was the optional part that confused me :(

best regards.