Re^5: Perl Moose syntax

These are all exactly equivalent:

has   'friends' => ( is => 'rw',   isa => 'Array',   default => () );
has    friends  => ((is => 'rw'), (isa => 'Array'), (default => ()));
has    friends  =>   is => 'rw',   isa => 'Array',   default => ();
has    friends  =>   is =>  rw =>  isa =>  Array =>  default => ();
has   "friends",    "is",  "rw",  "isa",  "Array",  "default",  ();
has qw/friends       is     rw     isa     Array     default/,  ();
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Moose has just chosen to write things the way they do, but you're free to choose any of the above, whichever is clearest to you - that's a lot of freedom! It's just a matter of taste, and arguing about it is just like arguing about whether your sandwich tastes better depending on if it's sliced diagonally, horizontally or vertically ;-)

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Re^6: Perl Moose syntax by choroba (Cardinal) on Dec 28, 2014 at 15:12 UTC
Which is, by the way, exactly equivalent to `has qw< friends is rw isa Array default >;` [download] لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ	[reply] [d/l]
Re^7: Perl Moose syntax by Anonymous Monk on Dec 28, 2014 at 15:23 UTC
Just keeping it analogous to OP's example. Test code was this: $ perl -wMstrict -MData::Dump=pp sub has { print pp(@_),"\n" } has 'friends' => ( is => 'rw', isa => 'Array', default => () ); has friends => ((is => 'rw'), (isa => 'Array'), (default => ())); has friends => is => 'rw', isa => 'Array', default => (); has friends => is => rw => isa => Array => default => (); has "friends", "is", "rw", "isa", "Array", "default", (); has qw/friends is rw isa Array default/, (); __END__ ("friends", "is", "rw", "isa", "Array", "default") ("friends", "is", "rw", "isa", "Array", "default") ("friends", "is", "rw", "isa", "Array", "default") ("friends", "is", "rw", "isa", "Array", "default") ("friends", "is", "rw", "isa", "Array", "default") ("friends", "is", "rw", "isa", "Array", "default") [download]	[reply] [d/l]