scripting - How does use of "my" keyword distiguish the results in perl? -

i dont understand how "my" keyword works here. perl script.

$line = ' sdfaad(asdvfr)';

code1:

if ($tmp = $line =~ /($\s*[^)]+$)/ ) { print $tmp; }

outputs:

1

code2:

if (my ($tmp) = $line =~ /($\s*[^)]+$)/ ) { print $tmp; }

outputs:

(asdvfr)

why 2 outputs different? have utilize of my?

it not my makes difference, scalar/list context. braces around $tmp imposing list context,

if (($tmp) = $line=~ /($\s*[^)]+$)/ ) # braces makes difference, not 'my'

while my declares variable lexical scoped one.

perl scripting pattern-matching output string-matching

Three