Perl assignment operator question

[Bernie]

So I have searched high and low, Google, Bing, duckduck but no luck.

I was given a set of perl scripts to maintain, in one of the scripts I see the following type of code:

$var //= "";

What is //=

If I look in the book "Programming Perl 4th edition" all it says is that this is an assignment operator, but not what it does.



Any help greatly appreciated.

TIA

 

[_kabal_]

null-coalescing assignment

It means ‘if $var is unassigned, set it to “”’

Like C#’s ??=

 

[Bernie]

null-coalescing assignment

It means ‘if $var is unassigned, set it to “”’

Like C#’s ??=

Thank you so much, it has been driving me mad. Makes sense now.

 

[s0lar]

Woah, memory lane. Perl was my go to back in the day.

Simple and effective.

 

[randomcat]

Woah, memory lane. Perl was my go to back in the day.

Simple and effective.

Not words a would use to describe it