Re^2: open(), go away with bad way, or fail with the right way?

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Re^3: open(), go away with bad way, or fail with the right way? by karlgoethebier (Abbot) on Jun 01, 2019 at 17:40 UTC
"...This allows things like..." Yes and no: `#!/usr/bin/env perl use strict; use warnings; use feature qw(say);; my $foo = 'Bar': my $foo = $foo x 2; say $foo; __END__` [download] Perl allows it generously but then it complains about `"my" variable $foo masks earlier declaration in same scope at ./foo.pl line 8.`. Iznogoud. But in a block it works flawless - no surprise: `KARL : { my $foo = $foo x 2; say $foo; }` [download] But why the effort? You could say `$foo x= 2;` which results in `BarBar`. If this is what you wanted. What i assume. Best regards, Karl ŤThe Crux of the Biscuit is the Apostropheť `perl -MCrypt::CBC -E 'say Crypt::CBC->new(-key=>'kgb',-cipher=>"Blowfish")->decrypt_hex($ENV{KARL});'`Help	[reply] [d/l] [select]
Re^4: open(), go away with bad way, or fail with the right way? by Anonymous Monk on Jun 01, 2019 at 18:00 UTC
"But why the effort?" It's only a demo. If you read the thread, it would be obvious.	[reply]
Re^5: open(), go away with bad way, or fail with the right way? by karlgoethebier (Abbot) on Jun 01, 2019 at 18:15 UTC
"...only a demo..." Even (or especially) a demo should compile without warnings. And masked variables may lead to pain in the ass (old saying). "...read the thread..." I have read the thread. Best regards, Karl ŤThe Crux of the Biscuit is the Apostropheť `perl -MCrypt::CBC -E 'say Crypt::CBC->new(-key=>'kgb',-cipher=>"Blowfish")->decrypt_hex($ENV{KARL});'`Help	[reply] [d/l]
Re^6: open(), go away with bad way, or fail with the right way? by Anonymous Monk on Jun 01, 2019 at 20:16 UTC
Re^7: open(), go away with bad way, or fail with the right way? by karlgoethebier (Abbot) on Jun 01, 2019 at 23:11 UTC
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Re^3: open(), go away with bad way, or fail with the right way? by Anonymous Monk on May 31, 2019 at 21:38 UTC
It's pretty useful in nested scopes and closures. For instance my $level = $level + 1;	[reply]