Html({
title => 'perl version cheat sheet',
- version => 'v1.0',
+ version => '1.3',
keywords => [qw'
perl version feature features comparison
sheet cheat overview summary
});
:>
-<h1>Perl cheat sheets</h1>
+<h1>Perl release summary</h1>
+<p>The most significant features introduced for recent versions of the Perl
+scripting language.
<:
my $info = do 'perl.inc.pl' or die $@ // $!;
+
+say "Depending on desired compatibility you'll want to support a minimum of";
+say join(' or ', map {
+ sprintf '<span title="on %s">v%vd</span>', $info->{$_}->{distrosum}, $_
+} v5.8, v5.20), '.';
+say '</p>';
+
for my $vernum (reverse sort keys %{$info}) {
my $verrow = $info->{$vernum};
- print '<div class="section">'."\n";
- printf '<h2>%vd <small style="position:absolute; margin-left:1em">%s</small></h2><dl>'."\n", $vernum, $verrow->{release};
- printf '<dt>%s<dd>%s', @{$_}, '<br/>' for @{ $verrow->{new} };
- printf '<dt>Unicode</dt><dd>v%s', $_ for $verrow->{unicode} || ();
- print "</dl>\n";
- print "</div>\n\n";
+ defined $verrow->{unstable} and next unless exists $get{v};
+
+ say '<div class="section">';
+ say sprintf '<h2>%vd <small>%s</small></h2>', $vernum, $verrow->{release};
+ say '<dl>';
+ for (@{ $verrow->{new} }) {
+ my ($topic, $desc, $attr) = @{$_};
+ if ($attr) {
+ my $title;
+ if (defined $attr->{experimental}) {
+ $title = 'experimental';
+ }
+ if ($attr->{dropped}) {
+ next unless exists $get{v};
+ $title = sprintf 'removed in %vd', $attr->{dropped};
+ }
+ elsif ($attr->{stable}) {
+ $title .= sprintf ' until %vd', $attr->{stable};
+ }
+ if ($attr->{experimental}) {
+ $title = sprintf '<span title="experimental::%s">%s</span>',
+ $attr->{experimental}, $title;
+ }
+ if ($attr->{feature}) {
+ my $prefix = sprintf '<span title="%s">feature</span>',
+ $attr->{feature};
+ $title = join ', ', $prefix, $title // ();
+ }
+ $desc .= sprintf ' <em class="ex">(%s)</em>', $title;
+ }
+ say sprintf '<dt>%s<dd>%s', $topic, $desc || '<br/>';
+ }
+ say sprintf '<dt>Unicode</dt><dd>v%s', $_ for $verrow->{unicode} || ();
+ say '</dl>';
+ say "</div>\n";
}