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Perl 6 - an Introduction

Perl 6 - an Introduction. Presented by jonasbn Yet Another Perl Monger <jonasbn@io.dk>. Larry Wall. Damian Conway. From Apocalypse to Exegesis. Larry Wall. The inventor of Perl Processes RFCs Writes Apocalypses (1-5). Damian Conway. Inventor of many fantastic modules

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Perl 6 - an Introduction

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  1. Perl 6 - an Introduction Presented by jonasbn Yet Another Perl Monger <jonasbn@io.dk>

  2. Larry Wall Damian Conway From Apocalypse to Exegesis

  3. Larry Wall • The inventor of Perl • Processes RFCs • Writes Apocalypses (1-5)

  4. Damian Conway • Inventor of many fantastic modules • Writes Exegesises (3-5)

  5. This Talk • This talk will evolve around the content of Apocalypse 3 VERY much the corresponding Exegesis 3 • Will mostly be about syntax (variables, operators, functions, arrays and hashes) • So lets start with something we know…

  6. Hello World of Perl6! #!/usr/bin/perl use warnings; use strict; print "Hello World of Perl6!\n";

  7. Variables • $_ is a lexical variable • $?, $!, $@ and $^E consolidated into $! • @ARGV changes name to @ARGS

  8. String Concatenation Operator • String concatenation changes from .= to _= $fullname = getFirstname _ getLastname;

  9. The New Dereferencing Operator .

  10. Binary Default Operator // my $debug //= $param{‘debug’} // 0;

  11. Arrays • The ($#) operator referring to the length of an array disappears, or is changed to @array.end or the Perl 6 semi-infinite list @array[1..] • Maybe @array[1..INF]

  12. Arrays #!/usr/bin/perl use Perl6::Variables; my @array = ('Egon', ’Benny', ’Keld'); for (my $i = 0; $i < (scalar @array); $i++) { print "@array[$i]\n"; }

  13. Hashes #!/usr/bin/perl use Perl6::Variables; my %hash = ( 'Fy' => 'Bi', 'Keld' => 'Dirk', 'Pallesen' => 'Pilmark' ); foreach my $key (keys %hash) { print "$key og %hash{$key}\n"; }

  14. Functions • Named parameters • $f is a scalar • $v is an optional scalar • *@array is a list (* == list context asterisk), where @array would be an array or array reference sub func ($f ; $v, *@array) {

  15. Named Parameters Again • Perl 5 (=>) is just a comma • Perl 6 (=>) is an constructor $d = setName(first => ‘Jonas’, last => ‘N.’); sub setName( $pair_ref1, $pair_ref2) { …

  16. Open Function • Open no longer takes a BAREWORD

  17. Enough Talk • We have now briefly touched Perl 6 • Perl 6 is still under development • Perl 6 has a long way to go • Many Apocalyptic writings and Exegesises will follow

  18. Getting Started on Perl 6 • Download Bundle::Perl6 from CPAN • Read the Exegesises

  19. References • ‘And Now for something completely similar’, Article by Damian Conway. SysAdmin, March 2002 Vol. 11, Number 3. • Apocalypse 1, Larry Wall • Exegesis 3, Damian Conway

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