On Sun, 11 Oct 2020, Tobias Boege wrote:
> On Sat, 10 Oct 2020, William Michels via perl6-users wrote:
> > then proceed to process the function call. As it is my understanding that
> > Raku incorporates a lot of different programming paradigms (imperative,
> > object-orie
On Sat, 10 Oct 2020, William Michels via perl6-users wrote:
> So I guess the first question I have is whether the 'auto-joining' of array
> elements is specc'ed or not.
>
I did not find anything that explicitly requires @array.split() to force
@array into a string, but there are tests in
On Sun, 30 Aug 2020, ToddAndMargo via perl6-users wrote:
> >- You are calling .lines on the value of .IO.open which is an
> > IO::Handle. IO::Handle.lines does not take a named argument
> > :chomp, so passing one is useless.
>
> That explains it.
>
> Bu:
>
On Sat, 29 Aug 2020, ToddAndMargo via perl6-users wrote:
> Hi All,
>
> I am trying to figure out how to use line with :$chomp.
> Now what am I doing wrong?
>
>
> $ alias p6
> alias p6='perl6 -e'
>
> $ p6 'say "Lines.txt".IO.open.lines(:chomp)[3,2];'
> (Line 3 Line 2)
>
> $ p6 'say
On Fri, 28 Aug 2020, ToddAndMargo via perl6-users wrote:
>https://docs.raku.org/type/IO::Path#method_lines
>
>(IO::Path) method lines
>
>Defined as:
>
>method lines(IO::Path:D: :$chomp = True, :$enc = 'utf8', :$nl-in =
> ["\x0A", "\r\n"], |c --> Seq:D)
>
>Opens the
On Thu, 27 Aug 2020, ToddAndMargo via perl6-users wrote:
> To pick out particular lines:
>$ cat Lines.txt | raku -e '.say for lines()[3,2,5]'
>Line 3
>Line 2
>Line 5
>
> If it is, it is buried somewhere.
>
> And what goes inside the ()? That may seem like a dumb
> remark
On Wed, 26 Aug 2020, Tobias Boege wrote:
> Observe:
>
> > 1 ...^ 20
> (1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19)
>
> > 1 ... ^20 # actually C«1 ... (0..19)»
> (1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19)
>
> The documentation [1] sta
On Wed, 26 Aug 2020, William Michels via perl6-users wrote:
> > They can be pretty great, especially when combined with the magic op=
> > operators that (in essence) know about identity elements. I've done a few
> > challenges on the Code Golf Stackexchange site where I wanted an infinite
> >
On Wed, 12 Aug 2020, Stuart Hungerford wrote:
> Hi,
>
> I'm working with roles where the mixing-in classes and roles need to
> have some mixin-specific notion of equality. So I have an Equality
> role that can also be
> mixed in as needed:
>
> role Equality {
> method equal(Equality:D) of
On Mon, 20 Jul 2020, Gianni Ceccarelli wrote:
> Aside:
>
> ``(sub (Int $ --> Int) {}) ~~ Walkable`` is false, because
> ``:(Int $ --> Int) ~~ :(Numeric $ --> Numeric)`` is false, which is
> correct because function subtypes should be contravariant in the parameter
> types and covariant in the
On Mon, 20 Jul 2020, Theo van den Heuvel wrote:
> Hi gurus,
>
> after looking at the documentation on Sub, Signature and the raku type
> system I find myself unable to constrain the types of functions in the way I
> think I need.
>
> The situation: I have a function, let's call in 'walker',
On Thu, 09 Jul 2020, Tobias Boege wrote:
> Now, there are effective ways to represent algebraic numbers like 9 ** (1/3)
> in such a way that you can do arithmetic with them, but I'm not aware of any
> implementation of that available to Raku. For someone with enough tuits,
> I think
On Thu, 09 Jul 2020, Aureliano Guedes wrote:
> Hi all,
>
> A quick question.
>
> This is expected?
>
> raku -e 'say 9 ** (1/3)'
> 2.080083823051904
>
>
> Why do I'm asking this?
> I know about the computational floating problem and I also know that the
> Raku deal with rational whenever it is
On Mon, 22 Jun 2020, Aureliano Guedes wrote:
> Thank you for the clarification.
>
> There is a method to set Rat precision at the scope of the program to apply
> to all *.Rat() cases?
>
I don't know, based on a quick search in the documentation, of any global
setting. The hacky solution would
On Mon, 22 Jun 2020, Aureliano Guedes wrote:
> Hi all,
>
> First, I'm naive in Raku. Then let's go to my question.
>
> I'm trying to figure out why we got so different results here:
>
> > e.Rat()**(pi.Rat()*i)
> -0.9902-1.3942922582021257e-07i
> > e**(pi*i)
>
On Mon, 22 Jun 2020, Elizabeth Mattijsen wrote:
> BEGIN trait_mod:(, :tighter(:<*>));
>
> comes to mind, but that doesn't seem to do the trick.
>
My guess: tighter and looser are only consulted by the parser
in contexts where 'any' was recognized as an *operator*.
On Mon, 22 Jun 2020, Joseph Brenner wrote:
> Patrick R. Michaud wrote:
>
> > The "any" function is just like any other function taking an arbitrary list
> > of arguments (including user-defined functions). As such it parses with
> > lower precedence than comparison operators -- so "eq" binds
On Sun, 24 May 2020, Elizabeth Mattijsen wrote:
> Hmmm... it appears we need to numerify the match to get numeric comparison
> semantics, so we put a "+" before the match:
>
> $ raku -e 'my @x=.sort: { +m/ \d+ $/ }; for @x { say $_;
> }'
> a1
> a2
> a5
> a123
> a133
>
So I think this would be
On Sun, 24 May 2020, ToddAndMargo via perl6-users wrote:
> On 2020-05-24 02:24, Elizabeth Mattijsen wrote:
> > dd .sort: { m/ \d+ $/ }
> >
>
> Hi Elizabeth,
>
> This seems to work:
>
>$ raku -e 'dd .sort: { m/ \d+ $/ };'
>("a5", "a6", "a33", "a111").Seq
>
>
> But I can't figure out
On Thu, 14 May 2020, ToddAndMargo via perl6-users wrote:
> Hi All,
>
> 1) how do I get 40 or more digits out of sqrt?
>
Meaningful digits? Not possible as sqrt uses limited precision. I think
the IEEE 754 doubles that I would suspect to be used internally are capped
way below 40 significant
On Fri, 08 May 2020, David Santiago wrote:
> I also noticed that although my data string is defined as
> CArray[uint8], when i loop through the array, the values are signed
> ints:
>
> say $_ for $ed.data[0..10];
>
> output:
>
> -98
There is an old open bug report about this:
On Sun, 19 Apr 2020, yary wrote:
> How would one do s/(.+),(.+)/$1,$0/ using .subst ?
> -y
You can pass a code block as the second argument which assembles the
replacement text. The block is evaluated anew for every substitution
and it has access to the latest captures:
say .subst(/(.*) ','
On Sun, 19 Apr 2020, yary wrote:
> Question from today's Raku meetup. This works in a way I expect
>
> > 'fosdffgg'.subst(/f+/,"( "~ * ~" )", :g);
> ( f )osd( ff )gg
>
> This one, $0 gets the single f each time
>
> > 'fosdffgg'.subst(/(f+)/,"( $0 )", :g);
> ( f )osd( f )gg
>
> Bug or
On Sun, 05 Apr 2020, Joseph Brenner wrote:
> I find in Raku that (as expected) I can use an object as a hash key:
>
> class Rutabaga { method color { say "purple (and white)"; } }
>
> my $obj = Rutabaga.new
> my %vegeout;
> %vegeout{ $obj } = "this works";
>
> And for something
On Tue, 31 Mar 2020, ToddAndMargo via perl6-users wrote:
> Hi All,
>
> Windows 10-1909 Pro
>
> raku -v
> This is Rakudo version 2020.01 built on MoarVM version
> 2020.01.1 implementing Perl 6.d.
>
> Running my program I get this at a call to
> a sub in a module:
>
> operand type 160 does
On Wed, 26 Feb 2020, ToddAndMargo via perl6-users wrote:
> > > $ p6 'say (99/70).base-repeating();'
> > > (1.4 142857)
> > >
> > > means that 142857 also repeats (it does not), but
> > > that it is best it can figure out with the precision
> > > it has?
> > >
> >
> > What are you talking about?
On Wed, 26 Feb 2020, Todd Chester via perl6-users wrote:
> Hi Tobias,
>
> I am confused as to as to what you mean by numerator and
> denominator.
>
Rational numbers can always be written as the ratio of two integers:
a/b with b non-zero. One calls a the numerator and b the denominator.
In Raku
On Thu, 20 Feb 2020, ToddAndMargo via perl6-users wrote:
> > > On Fri, 21 Feb 2020 at 13:31, ToddAndMargo via perl6-users
> > > mailto:perl6-users@perl.org>> wrote:
> > >
> > > $ perl6 -e 'say sqrt(2).base-repeating();'
> > > No such method 'base-repeating' for invocant of type 'Num'
> >
On Wed, 19 Feb 2020, Paul Procacci wrote:
> >> Is there a test to see if a number is irrational
> There is no such thing as an irrational number in computing.
>
> Surely there are "close approximations", but that's the best any computer
> language can currently do.
>
It all depends on
On Mon, 03 Feb 2020, ToddAndMargo via perl6-users wrote:
> Hi All,
>
> Did Larry put a sneaky way to tell how many bytes
> a UInt/Int is using?
>
The number of bits required to store an Int is, for positive numbers,
the same as the index of their most significant bit, which is available
via
On Sat, 01 Feb 2020, Paul Procacci wrote:
> Hey ladies/gents,
>
> How would one go about defining a subset of a Hash who's key's and values
> are both constrained by something
>
> I've read https://docs.perl6.org/type/Hash and it does make mention of
> constraining keys and values, but not
On Tue, 28 Jan 2020, ToddAndMargo via perl6-users wrote:
> This all came up when I tried to match
>
> RegSetValueExW(
> _In_ HKEY hKey,
> _In_opt_ LPCWSTR lpValueName,
> _Reserved_ DWORD Reserved,
> _In_ DWORD dwType,
>
On Tue, 28 Jan 2020, Simon Proctor wrote:
> So some recent conversations covered the Range method on numeric types like
> Int
>
> So Int.Range gives the range of valid values -Inf^..^Inf which is neat.
>
> Then I thought I'd try UInt.Range and got 0..^Inf
>
> Ah Ha! Thinks I. I have a plan.
On Sat, 25 Jan 2020, ToddAndMargo via perl6-users wrote:
> Hi All,
>
> Anyone have a workaround to my stolen uint's?
>
> > constant DWORD := uint32;
> (uint32)
>
> > subset StrOrDword where Str | DWORD;
> (StrOrDword)
>
> > sub x( StrOrDword $item ) {
> * say "$item is a " ~ $item.^name;
On Mon, 20 Jan 2020, ToddAndMargo via perl6-users wrote:
> Hi All,
>
> Now what am I doing wrong?
>
> my $v = 0b00101101 ^ 0b1001; say $v.base(2);
> one(101101, 1001)
>
> It should be
> 100100
>
Please examine the output you get. Does the spurious "one" in there not
make you
On Sun, 19 Jan 2020, ToddAndMargo via perl6-users wrote:
> RFE: Please add the following examples to routine +^
> https://github.com/Raku/doc/issues/3177
>
> Now I wait and see what kind of reception I get. It
> will be nice to contribute to the docs, rather than
> just always griping about them
On Sat, 18 Jan 2020, ToddAndMargo via perl6-users wrote:
>
> > Would you be so kind to post this as an issue in the documentation, so
> > we can pick up on it?
> >
> > Thanks!
> >
> > JJ
>
> Would you mind posting back the link to it, so I can
> get on the following list?
On Fri, 17 Jan 2020, ToddAndMargo via perl6-users wrote:
> Hi All,
>
> https://docs.raku.org/routine/+$CIRCUMFLEX_ACCENT
>
> (Operators) infix +^§
>
> multi sub infix:<+^>($a, $b --> Int:D)
>
> Integer bitwise XOR operator: Coerces both arguments to Int and does a
> bitwise XOR (exclusive OR)
On Sat, 18 Jan 2020, JJ Merelo wrote:
> The example works perfectly, and it does because it's a string literal
> which is already 0 terminated. Let's use this code instead of the one that
> I used in my other mail about this (which you probably didn't read anyway):
>
> 8< 8< 8<
>
> What does
On Thu, 02 Jan 2020, ToddAndMargo via perl6-users wrote:
> Hi All,
>
> “He who asks is a fool for five minutes, but he who
> does not ask remains a fool forever.”
> ― Mark Twain
>
> This would be my five minutes. I will live.
>
> How do I do a 32 bit unsigned integer (cardinal)?
On Tue, 31 Dec 2019, Marc Chantreux wrote:
> hello,
>
> 2020 describes itself as it is composed by
>
> 2 0
> 0 1
> 2 2
> 0 3
>
> perfect golf excuse! I have :
>
> sub is_autobiographic (\x) {
> my \s = x.Str;
> my @r = s.comb;
> my %appearance_of;
>
On Sat, 14 Dec 2019, ToddAndMargo wrote:
> What am I doing wrong here?
>
> > multi prefix:<√> (Cool:D $x) { $x.sqrt }
> :<√>
>
> > say √2
> ===SORRY!===
> Argument to "say" seems to be malformed
> --> say⏏ √2
> Bogus postfix
If this is inside the REPL, it's not your fault. It's a known
On Fri, 13 Dec 2019, Brad Gilbert wrote:
> There should probably be a way to require a minimum version of the compiler.
>
> use rakudo v2019.07;
>
As I understand it, this would do something quite different from `use v6`,
which is probably your point(?). A single Raku compiler would strive
On Mon, 09 Dec 2019, perl6-users-h...@perl.org wrote:
> Date: Sun, 8 Dec 2019 17:45:22 -0800
> From: ToddAndMargo via perl6-users
> To: perl6-users
> Subject: My keeper on "contains"
>
> 8< ...
>
> Case insensitive contains:
> $ p6 'if "2018 Jul 7".fc.contains( "jul".fc ) {say "Yes";}'
>
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