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Use \Q and \E
$line =~ s/\Q$var2\E/$var1/;
(In this case you don't need the \E at the end, since it'll end at the end of the regexp anyway, but it's good to know if you do need it later.)

Also, I'm not sure what you mean by "I can't use ' instead of " because of algorytm specific", but if you need to interpolate variables and still not have to quote quotes.

my $line = <<"HTML"; <a href="/{HOST}?action">123</a>:</b><br>[img-smile "58-41" ":)"] HTML chomp $line;
Or you can use qq with just about any delimiter.
my $line = qq#<a href="/{HOST}?action">123</a>:</b><br>[img-smile "58- +41" ":)"]#;

In reply to Re: using variables in regular expr replace by Eimi Metamorphoumai
in thread using variables in regular expr replace by b888

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    [stevieb]: shmem thanks for the 'insight' :P
    [shmem]: good thing that Sun already took "OpenWindows", otherwise I'd not stop to shudder imagining an "OpenWindows" from MS
    [shmem]: more garbage in, more garbage out that would be
    [stevieb]: I found that win10 broke a C# library I was using for one project while enhancing tests for a Perl dist, which breaks other Perl dists, and I'm about to throw my hands up on berrybrew. win2k12 broke one thing, win10 breaks something...
    [stevieb]: ...unrelated which requires replacing a lot of code and a whole lib. I'm about to go nix only ffs
    [shmem]: stevieb: what you're doing sounds afwully complex. Too much for me this evening to provide brighter insight ;-)
    [stevieb]: I don't even own a Windows computer. Both my girl and I have a laptop each with Linux. I'm supporting Windows in some of my projects and I can't even guage whether it's worth it or not.
    [stevieb]: shmem It's something I desired to have years ago, which is why I took over berrybrew. Cross-platform build/test automation locally, or over the network Test::BrewBuild
    [shmem]: sounds good.

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