December 2004

Discussions Analytics Info

Search Discussions

19 discussions - 249 posts

Newest Active Popular

19
specifying the key Type for a Hash

A6 included examples of syntax for specifying the type of the key for a hash: my %pet is Hash(keytype = Str, returns = Cat) None of the synopses have anything like this. S6 talks about the types of ...

Abhijit Mahabal
Dec 3, 2004 at 10:24 pm
Dec 10, 2004 at 1:22 pm
17
S05 question

I'm reviewing the updated S05 (2 Dec 2004) and ran across this in the "Hypothetical Variables" section: # Pairs of repeated captures can be bound to hashes: / %<options := [ (<ident ) = (\N+) ]* / ...

Patrick R. Michaud
Dec 7, 2004 at 7:11 pm
Dec 10, 2004 at 5:56 pm
15
Auto My?

Considering that "proper" and common usage, not to mention strictures, dictates a heavy insistence on 'my'. I will thus assume that creation of lexical variables with 'my' far out numbers the ...

Rod Adams
Dec 18, 2004 at 8:53 pm
Dec 21, 2004 at 2:08 pm
12
Classes with several, mostly unused, attributes

Consider a class (e.g., the hypothetical Geometry::Triangle) that can have several attributes (side1, side2, side3, angle1, ang_bisector1, side_bisector, altitude1 and so forth), most of which will ...

Abhijit Mahabal
Dec 10, 2004 at 4:05 pm
Dec 16, 2004 at 8:18 pm
12
iterators and functions (and lists)

hm.. consider that: perl5: open $fh, 'file'; $first_line = <$fh ; @remaining = <$fh ; perl6: $fh = open 'file'; $first_line = $fh(); @remaining = $fh(); I thought about parallels between arrays and ...

Alexey Trofimenko
Dec 4, 2004 at 5:04 pm
Dec 10, 2004 at 3:16 pm
9
state vs my

for 1..10_000_000 { my ($a,$b,$c) = ... ... } vs. for 1..10_000_000 { state ($a,$b,$c) = ... ... } latter looks like it would run faster, because no reallocation envolved here. I've read an advice ...

Alexey Trofimenko
Dec 4, 2004 at 3:31 am
Dec 10, 2004 at 2:52 pm
9
Python is not Java...but will Perl 6 be?

From http://dirtsimple.org/2004/12/python-is-not-java.html "In Java, you have to use getters and setters because using public fields gives you no opportunity to go back and change your mind later to ...

John Siracusa
Dec 3, 2004 at 7:07 pm
Dec 4, 2004 at 12:41 am
5
<flip flop> xx Inf

What happens to the flip flop operator? Will .. in scalar context remain the same? What comes in place of ...? (An adverb?) Juerd

Juerd
Dec 4, 2004 at 12:11 am
Dec 10, 2004 at 12:39 pm
5
Container method calls

Howdy, While browsing the updated synopses, I noticed a problem with how scalar container methods are called. Currently, both value methods and container methods are shown in the synopses as being ...

Ashley Winters
Dec 4, 2004 at 12:01 pm
Dec 6, 2004 at 7:42 pm
4
strictness and fully qualified global vars

in perl5 C<use strict doesn't save us from typo bugs in code like use strict; print $OtherPackage::erroneuos_name; in perl5 C<our $var auotovivifies ${__PACKAGE__ . "::"}{var} glob at compile time, ...

Alexey Trofimenko
Dec 29, 2004 at 3:55 am
Jan 4, 2005 at 6:56 pm
1
Perl 6 Summary for 2004-12-06 through 2004-12-20

Perl 6 Summary for 2004-12-06 through 2004-12-20 All~ The observant among you might notice that I missed last week's summary. With the hubbub and confusion of the holidays, I blame ninjas, in ...

Matt Fowles
Dec 21, 2004 at 2:52 am
Dec 21, 2004 at 5:53 am
1
Undeclared attributes

Attributes are declared with C<has , but also have a unique signil C<$. . So is it strictly necessary to declare them? Or rather, is it C<no strict ly necessary -- i.e. is the following legal? no ...

Dave Whipp
Dec 10, 2004 at 5:25 pm
Dec 10, 2004 at 6:55 pm
1
Is object representation "per class" or "per object"?

According to S12, it is possible to supply the object layout to bless(), like so: $object = $class.bless(:CREATE[:repr<P6opaque ] :k1($v1) :k2($v2)) But in the section "Introspection", "layout" is a ...

Abhijit Mahabal
Dec 7, 2004 at 5:33 pm
Dec 8, 2004 at 11:42 pm
1
Lexical scope of parametric declaration blocks

In S12, I see examples like: role Pet[Type $petfood = TableScraps] { method feed (::($petfood) $food) {...} } I assume that means lexicals declared as part of a parametric specialization declaration ...

Ashley Winters
Dec 7, 2004 at 11:40 pm
Dec 8, 2004 at 4:55 am
1
Perl 6 Summary for 2004-11-29 through 2004-12-06

Perl 6 Summary for 2004-11-29 through 2004-12-06 All~ Last week I asked for help identifying the source of a quotation. One friendly soul suggested Alan J. Perlis, but could not find an actual ...

Matt Fowles
Dec 7, 2004 at 2:36 am
Dec 8, 2004 at 3:11 am
1
slight discrepancy between S2 and S7

S2: my $foo = 42; say %MY::<$foo ; # prints "42" S6: Perl5ish subroutine declarations ... sub say { print qq{"@_"\n}; } # args appear in @_ Because C<print has no final newline, I would expect C<say ...

Stéphane Payrard
Dec 6, 2004 at 7:27 pm
Dec 6, 2004 at 7:45 pm
1
temp $var;

my $var="foo"; { temp $var; say $var; } would it be undef or "foo"? if the former, how could I make $var to contain a copy of original content? using analogy with my $x = $x, that's not going to ...

Alexey Trofimenko
Dec 4, 2004 at 3:01 am
Dec 4, 2004 at 3:10 am
1
Yet more on angle quotes

How equivalent are << and «? Does use of one idiom imply the closing quote is the same. ie are the following allowed, prohibited or what? <<list of words» «list of words Just thinking... Richard -- ...

Richard Proctor
Dec 3, 2004 at 9:31 pm
Dec 3, 2004 at 10:23 pm
0
Re: [CVS ci] class refactoring 1 - Integer

[ From p6i ] Patrick R. Michaud writes: Well, IAAL. :-) In particular, xor is analogous, operatorwise, to the junctive one(). one() represents its single true value when it evaluates to true in ...

Luke Palmer
Dec 10, 2004 at 8:44 pm
Dec 10, 2004 at 8:44 pm