Free context software for linux

App::Context is an application framework for web applications, command-line programs, server programs, and web services.

This is the App-Context distribution.

For more information, see the web pages at

http://www.officevision.com/pub/App-Context

The mailing list is described at

http://p5ee.perl.org/mailinglist/

http://lists.perl.org/showlist.cgi?name=p5ee

HOW DO I INSTALL IT?

To install this module, cd to the directory that contains this README file and type the following:

perl Makefile.PL
make
make test
make install

Perl6::Contexts - array and hash variables turn into references to themselves when used in non-numeric scalar context or as function arguments.

SYNOPSIS

my @foo = ( 1 .. 20 );
my $foo = @foo; # same as: my $foo = @foo;
my $foo = 0 + @foo; # unchanged - length of @foo
$obj->some_method(10, 20, @foo); # same as: $obj->some_method(10, 20, @foo);
some_function(10, 20, @foo); # same as: some_function(10, 20, @foo);

Perl6::Contexts makes Perl 5 behave more like Perl 6 with regard to the array and hash variables as used as arguments to operators, method calls, and functions.

This module doesnt add new syntax -- it merely changes the meaning of existing syntax. Using this module to make Perl 5 more like Perl 6 wont go very far towards writing Perl 5 that will run under Perl 6 but it will help you get used to some of the changes.

To run legacy Perl 5 along side Perl 6, check out PONIE or Inline::Pugs.

Contextual::Return is a Perl module to create context-senstive return values.

SYNOPSIS

use Contextual::Return;
use Carp;

sub foo {
return
SCALAR { thirty-twelve }
BOOL { 1 }
NUM { 7*6 }
STR { forty-two }

LIST { 1,2,3 }

HASHREF { {name => foo, value => 99} }
ARRAYREF { [3,2,1] }

GLOBREF { *STDOUT }
CODEREF { croak "Dont use this result as code!"; }
;
}

# and later...

if (my $foo = foo()) {
for my $count (1..$foo) {
print "$count: $foo is:n"
. " array: @{$foo}n"
. " hash: $foo->{name} => $foo->{value}n"
;
}
print {$foo} $foo->();
}

Usually, when you need to create a subroutine that returns different values in different contexts (list, scalar, or void), you write something like:

sub get_server_status {
my ($server_ID) = @_;

# Acquire server data somehow...
my %server_data = _ascertain_server_status($server_ID);

# Return different components of that data,
# depending on call context...
if (wantarray()) {
return @server_data{ qw(name uptime load users) };
}
if (defined wantarray()) {
return $server_data{load};
}
if (!defined wantarray()) {
carp Useless use of get_server_status() in void context;
return;
}
else {
croak q{Bad context! No biscuit!};
}
}

That works okay, but the code could certainly be more readable. In its simplest usage, this module makes that code more readable by providing three subroutines--LIST(), SCALAR(), VOID()--that are true only when the current subroutine is called in the corresponding context:

use Contextual::Return;

sub get_server_status {
my ($server_ID) = @_;

# Acquire server data somehow...
my %server_data = _ascertain_server_status($server_ID);

# Return different components of that data
# depending on call context...
if (LIST) { return @server_data{ qw(name uptime load users) } }
if (SCALAR) { return $server_data{load} }
if (VOID) { print "$server_data{load}n" }
else { croak q{Bad context! No biscuit!} }
}

Contextual returns

Those three subroutines can also be used in another way: as labels on a series of contextual return blocks (collectively known as a context sequence). When a context sequence is returned, it automatically selects the appropriate contextual return block for the calling context. So the previous example could be written even more cleanly as:

use Contextual::Return;

sub get_server_status {
my ($server_ID) = @_;

# Acquire server data somehow...
my %server_data = _ascertain_server_status($server_ID);

# Return different components of that data
# depending on call context...
return (
LIST { return @server_data{ qw(name uptime load users) } }
SCALAR { return $server_data{load} }
VOID { print "$server_data{load}n" }
DEFAULT { croak q{Bad context! No biscuit!} }
);
}

The context sequence automatically selects the appropriate block for each call context.

DocBook to LaTeX/ConTeXt Publishing project is splitted in two instances working on the same principles. Both instances are intended to produce DVI, PostScript, PDF documents from DocBook SGML or XML sources, by converting first to a high level set of TeX macros.

Even if close, each instance is provided as an independent package and works alone. The available instances are:

dblatex

Publishing is done by using LaTeX.

dbcontext

Publishing is done by using ConTeXt.

coComment! is a Firefox extension that allows you to activate coComment! from the right-click context menu and reduces your onscreen movement time so that you dont have to move all the way from the comment text box to the Bookmarks and then back to the Submit button.

TextMarker! is a Firefox extension that allows you to highlight text selections via keyboard and context menu. Also allows for the highlighted text to be copied individually or all. 3 highlighter colours are available that can be customised.

Longdesc allows you to view images longdesc tag from the contex menu.

"Adds View Image Longdesc: ..." to the image context menu
(obviously only if the image element does have a longdesc attribute set).