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