72 lines
1.6 KiB
HTML
72 lines
1.6 KiB
HTML
<h2>Comments</h2>
|
|
<pre><code># Single line comment
|
|
=head1 Here There
|
|
Be Pods!
|
|
=cut</code></pre>
|
|
|
|
<h2>Strings</h2>
|
|
<pre><code>q/foo bar baz/;
|
|
q awhy not ?a;
|
|
qw(foo bar baz) q{foo bar baz}
|
|
q[foo bar baz] qq<foo bar baz>
|
|
"foo bar baz" 'foo bar baz' `foo bar baz`</code></pre>
|
|
|
|
<h2>Regex</h2>
|
|
<pre><code>m/foo/ s/foo/bar/
|
|
m zfooz s zfoozbarz
|
|
qr(foo) m{foo} s(foo)(bar) s{foo}{bar}
|
|
m[foo] m<foo> tr[foo][bar] s<foo><bar>
|
|
/foo/i
|
|
</code></pre>
|
|
|
|
<h2>Variables</h2>
|
|
<pre><code>${^POSTMATCH}
|
|
$^V
|
|
$element_count = scalar(@whatever);
|
|
keys(%users) = 1000;
|
|
$1, $_, %!;</code></pre>
|
|
|
|
<h2>Numbers</h2>
|
|
<pre><code>12345
|
|
12345.67
|
|
.23E-10 # a very small number
|
|
3.14_15_92 # a very important number
|
|
4_294_967_296 # underscore for legibility
|
|
0xff # hex
|
|
0xdead_beef # more hex
|
|
0377 # octal (only numbers, begins with 0)
|
|
0b011011 # binary</code></pre>
|
|
|
|
<h2>Full example</h2>
|
|
<pre><code>sub read_config_file {
|
|
my ($class, $filename) = @_;
|
|
|
|
unless (defined $filename) {
|
|
my $home = File::HomeDir->my_home || '.';
|
|
$filename = File::Spec->catfile($home, '.pause');
|
|
|
|
return {} unless -e $filename and -r _;
|
|
}
|
|
|
|
my %conf;
|
|
if ( eval { require Config::Identity } ) {
|
|
%conf = Config::Identity->load($filename);
|
|
$conf{user} = delete $conf{username} unless $conf{user};
|
|
}
|
|
else { # Process .pause manually
|
|
open my $pauserc, '<', $filename
|
|
or die "can't open $filename for reading: $!";
|
|
|
|
while (<$pauserc>) {
|
|
chomp;
|
|
next unless $_ and $_ !~ /^\s*#/;
|
|
|
|
my ($k, $v) = /^\s*(\w+)\s+(.+)$/;
|
|
Carp::croak "multiple enties for $k" if $conf{$k};
|
|
$conf{$k} = $v;
|
|
}
|
|
}
|
|
|
|
return \%conf;
|
|
}</code></pre>
|