Re: [Fwd: [Fwd: Re: what is going on here?]]
On 2009 Jan 11, at 3:50, Richard Hainsworth wrote:
To be precise - why the ':' after the sort?
'%players.sort' calls the 'sort' method/sub on the hash '%players'.
'{.value}' runs '.value' on $_ at some point. But when?
So once again, what is the ':' doing? How else could this code be
written?
I think I have this right: perl5 has indirect object syntax, which is
ambiguous (the parse of a program can change by whether perl5 had
previously seen a sub by that name).
In perl6, the colon is required to signify an indirect object, even if
there are no following parameters.
--
brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allb...@kf8nh.com
system administrator [openafs,heimdal,too many hats] allb...@ece.cmu.edu
electrical and computer engineering, carnegie mellon universityKF8NH
[Fwd: [Fwd: Re: what is going on here?]]
thanks for the response, but i was really looking for a bit more detail.
To be precise - why the ':' after the sort?
'%players.sort' calls the 'sort' method/sub on the hash '%players'.
'{.value}' runs '.value' on $_ at some point. But when?
So once again, what is the ':' doing? How else could this code be written?
Hal Wigoda wrote:
the first line creates a hash,
the second line sorts the hash values into an array.
the third loops thru the array values printing one array member per line
On Jan 10, 2009, at 2:26 PM, Richard Hainsworth wrote:
Could someone help me understand what is going on in the following
snippet?
my %players = {'william'=>2, 'peter'=>3,'john'=>1,'mary'=>5};
my @ranking = %players.sort: { .value };
for @ranking {.say};
I cut and pasted from Patrick's blog on sorting and played around to
get an array.
But ... I dont understand what is being passed to @ranking.
More precisely, I dont understand the meaning of the ':' after '.sort'
Where is this behaviour described? I looked in WITCH under :
but couldnt really understand it :(
