Interpolation in regex

[moroshko]

I have the following program:

#!/usr/bin/perl
use warnings;
use strict;
my $_ = 'Hello$xWorld';
my $x = 'abc';
print /$x/;

The output is nothing

How can I ask Perl not to interpolate $x ?

Thanks in advance !

 

[KevinADC]

It should print:

Can't use global $_ in "my" at script line 4, near "my $_ " Execution of script aborted due to compilation errors.

Your code has other problems too, like this will be interpreted as a regexp:

print /$x/;

Are you trying to learn how to expand variables in single-quoted constructs/program input? Normally perl does not interpolate variables inside of single-quoted constructs, you should use double-quotes. But you can use a regexp or eval to interpolate variables where perl would not normally do that.

Are you a student?


------------------------------------------
- Kevin, perl coder unexceptional!

 

[KevinADC]

OK, I see from another forum that you wanted to literally find the literal expression $x inside of $_. You discovered how to do that. So I just wasted my time helping you above with the same answers you got on another forum that were not even the point of your question.

------------------------------------------
- Kevin, perl coder unexceptional!

 

[moroshko]

Kevin, Thank you very much anyway !
I appreciate your wish to help !!

By the way, I'm not a student.
I have a degree in Math+Computer Science, but I never learned Perl.
Now, I'm learning Perl from internet.
I must admit that I like it very much !!!
Tell me please, do you know another Perl forums in which I can get answers fast ?