AA
d2: 1
AB
d2: 2
...
By Geoffrey, I think I almost have it!
Thanks!
From: yary
Sent: Tuesday, September 1, 2020 6:16 PM
To: Andy Bach
Cc: William Michels ; perl6-users
Subject: Re: print particular lines question
Every time $ shows up, it is a differe
context.
> Methods .^name, .raku, .gist, or .say can be used to stringify it to
> something meaningful.
> in block at -e line 1
> ...
> AA
>
> but the named doesn't
> raku -e 'for -> $alpha { for (1..14) { state $sv = $alpha; say
> $sv; $sv++; printf("d: %
ine 1
...
AA
but the named doesn't
raku -e 'for -> $alpha { for (1..14) { state $sv = $alpha; say $sv;
$sv++; printf("d: %s\n", $sv ) } }'
AA
d: AB
AB
d: AC
____
From: William Michels
Sent: Tuesday, September 1, 2020 5:30 PM
To: Andy Bach
Cc: y
ot;, $.raku ) } }'
> ===SORRY!=== Error while compiling -e
> Variable $.raku used where no 'self' is available
> at -e:1
> --> v = $alpha)++; printf("d: %s\n", $.raku⏏ ) } }
> expecting any of:
> term
>
> So I'm missing something about "$", I think
>
>
>
&g
m
So I'm missing something about "$", I think
________
From: William Michels via perl6-users
Sent: Tuesday, September 1, 2020 3:17 PM
To: yary
Cc: perl6-users
Subject: Re: print particular lines question
I tried combining Larry's code and Yary's c
Yes, because INIT and BEGIN happen before runtime, and $alpha is set at
runtime! Hence my original BEGIN example using a constant to set the first
value.
Another reason to prefer "state" over those phasers... unless you want a
counter over the lifetime of the process, which is valid.
-y
On
I tried combining Larry's code and Yary's code, variously using
"state" or "INIT" or "BEGIN". This is what I saw:
~$ raku -e 'for -> $alpha { for (1..14) { print (state $ =
$alpha)++ ~ " " } }'
AA AB AC AD AE AF AG AH AI AJ AK AL AM AN NN NO NP NQ NR NS NT NU NV
NW NX NY NZ OA
~$ raku -e 'for
Thanks, that's cool, and shows me something I was wondering about
On Tue, Sep 1, 2020 at 11:36 AM Larry Wall wrote:
> If you want to re-initialize a state variable, it's probably better to make
> it explicit with the state declarator:
>
> $ raku -e "for { for (1..2) { say (state $ =
On Mon, Aug 31, 2020 at 05:05:53PM -0700, yary wrote:
: I like this better for alpha counter
:
: raku -e "for (1..4) { say (BEGIN $ = 'AAA')++ }"
:
: with BEGIN, the assignment of AAA happens once. With the earlier ||= it
: checks each time through the loop.
: -y
Careful with that, though,
Nope $_ is the "default topic" if you want to use the jargon. It has a
name, the underscore character.
$ is a nameless variable, jargon is "anonymous scalar"
$_ is different specialness from $
-y
On Mon, Aug 31, 2020 at 5:13 PM ToddAndMargo via perl6-users <
perl6-users@perl.org> wrote:
> On
On 2020-08-31 17:03, yary wrote:
anonymous variable
Would be safe thinking it had the same properties as `$_`?
I like this better for alpha counter
raku -e "for (1..4) { say (BEGIN $ = 'AAA')++ }"
with BEGIN, the assignment of AAA happens once. With the earlier ||= it
checks each time through the loop.
-y
On Mon, Aug 31, 2020 at 5:03 PM yary wrote:
> Not even a reset- every time there's a $ by itself
Depends where in your code the $++ is.
It may play as global or as local.
raku -e 'for 1..3 {say $++}; say $++'
On Mon, Aug 31, 2020 at 9:03 PM ToddAndMargo via perl6-users <
perl6-users@perl.org> wrote:
>
> > adn
>
> fixed
>
--
Aureliano Guedes
skype: aureliano.guedes
contato: (11)
Not even a reset- every time there's a $ by itself it is a new/different
anonymous variable. So it is only useful where it is never referred to
anywhere else.
$ raku -e "for (1..4) { say $++, ' , ', ++$; say 'again- ',$;}"
0 , 1
again- (Any)
1 , 2
again- (Any)
2 , 3
again- (Any)
3 , 4
adn
fixed
On 2020-08-31 16:57, ToddAndMargo via perl6-users wrote:
On 2020-08-31 16:53, ToddAndMargo via perl6-users wrote:
On Mon, Aug 31, 2020, 4:20 PM ToddAndMargo via perl6-users
mailto:perl6-users@perl.org>> wrote:
On 2020-08-31 05:53, Brian Duggan wrote:
> On Monday, August 24, Curt
On 2020-08-31 16:53, ToddAndMargo via perl6-users wrote:
On Mon, Aug 31, 2020, 4:20 PM ToddAndMargo via perl6-users
mailto:perl6-users@perl.org>> wrote:
On 2020-08-31 05:53, Brian Duggan wrote:
> On Monday, August 24, Curt Tilmes wrote:
>> $ cat Lines.txt | raku -e '.say for
On Mon, Aug 31, 2020, 4:20 PM ToddAndMargo via perl6-users
mailto:perl6-users@perl.org>> wrote:
On 2020-08-31 05:53, Brian Duggan wrote:
> On Monday, August 24, Curt Tilmes wrote:
>> $ cat Lines.txt | raku -e '.say for lines()[3,2,5]'
>
> The -n flag is an option here
Answering my own question, the operator sets the type of $. That's what
gradual typing is all about!
$ seq 5 | raku -ne "say $++"
0
1
2
3
4
$ seq 5 | raku -ne "say $ ~= 'Hi' "
Hi
HiHi
HiHiHi
HiHiHiHi
HiHiHiHiHi
$ seq 5 | raku -ne "say $++, $ ~= ' Hi' "
0 Hi
1 Hi Hi
2 Hi Hi Hi
3 Hi
Basically :
$ raku -e 'my $a = 1; say ++$a; say $a'
2
2
$ raku -e 'my $a = 1; say $a++; say $a'
1
2
On Mon, Aug 31, 2020 at 8:36 PM yary wrote:
> $ by itself is an anonymous variable, putting ++ after starts it at 0 (hmm
> or nil?) and increments up.
>
> By putting the plus plus first, ++$, it
$ by itself is an anonymous variable, putting ++ after starts it at 0 (hmm
or nil?) and increments up.
By putting the plus plus first, ++$, it will start at 1, thanks to
pre-increment versus post increment
On Mon, Aug 31, 2020, 4:20 PM ToddAndMargo via perl6-users <
perl6-users@perl.org> wrote:
On 2020-08-31 05:53, Brian Duggan wrote:
On Monday, August 24, Curt Tilmes wrote:
$ cat Lines.txt | raku -e '.say for lines()[3,2,5]'
The -n flag is an option here too:
raku -ne '.say if $++ == 3|2|5' Lines.txt
Brian
Hi Bill,
Works beatifically! And no bash pipe!
$ raku -ne '.say
rom: William Michels
Sent: Monday, August 31, 2020 10:28 AM
To: Brian Duggan
Cc: Andy Bach ; perl6-users
Subject: Re: print particular lines question
How would P5 handle line numbers > 10 ? Not getting back line #11 with
the P5 examples below:
$ raku -ne '.say if ++$ == 3|2|5|11' test_lin
Thanks Yary! So that means Brian's answer in Raku can use the
smartmatch operator instead of the "==". Good to know!
~$ raku -ne '.say if ++$ ~~ 3|5|11' test_lines.txt
Line 3
Line 5
Line 11
On Mon, Aug 31, 2020 at 8:47 AM yary wrote:
>
> Aww don't you remember Raku's earliest(?) contribution to
Aww don't you remember Raku's earliest(?) contribution to Perl? I was so
happy when this arrived, and sad over its subsequent neglect
perl -ne 'no warnings "experimental"; print if $. ~~ [3,5,11]' line0-10.txt
-y
On Mon, Aug 31, 2020 at 8:28 AM William Michels via perl6-users <
How would P5 handle line numbers > 10 ? Not getting back line #11 with
the P5 examples below:
$ raku -ne '.say if ++$ == 3|2|5|11' test_lines.txt
Line 2
Line 3
Line 5
Line 11
~$ perl -ne 'print if $. =~ /\b[3 2 5 11]\b/' test_lines.txt
Line 1
Line 2
Line 3
Line 5
~$ perl -ne 'print if $. =~
On Monday, August 31, Andy Bach wrote:
> > raku -ne '.say if $++ == 3|2|5' Lines.txt
>
> OT, maybe, but is
> perl -ne 'print if $. =~ /\b[325]\b/' Lines.txt
>
> or
> perl -ne 'print if $c++ =~ /\b[436]\b/' Lines.txt
>
> the best you can do in P5?
I can't think of anything better :-)
Brian
st 31, 2020 7:53 AM
To: Curt Tilmes
Cc: perl6-users
Subject: Re: print particular lines question
On Monday, August 24, Curt Tilmes wrote:
> $ cat Lines.txt | raku -e '.say for lines()[3,2,5]'
The -n flag is an option here too:
raku -ne '.say if $++ == 3|2|5' Lines.txt
Brian
On Monday, August 24, Curt Tilmes wrote:
> $ cat Lines.txt | raku -e '.say for lines()[3,2,5]'
The -n flag is an option here too:
raku -ne '.say if $++ == 3|2|5' Lines.txt
Brian
Dear Tobias (and Sean), I opened a Github issue:
https://github.com/rakudo/rakudo/issues/3881
On Wed, Aug 26, 2020 at 12:12 PM Tobias Boege wrote:
> 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
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] states that the C«...» infix is
On Wed, Aug 26, 2020 at 10:33 AM Tobias Boege wrote:
>
> 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
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
> >
> 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
> sequence like this:
>
> 0, 1, -2, 3, -4, 5, -6, ...
>
> It took
On 2020-08-24 20:30, ToddAndMargo via perl6-users wrote:
On Mon, Aug 24, 2020 at 11:08 PM ToddAndMargo via perl6-users
wrote:
On 2020-08-24 19:35, ToddAndMargo via perl6-users wrote:
Hi All,
I seems I should know how to do this, but
I am drawing a blank.
$ cat Lines.txt | raku -ne 'say
> On Aug 25, 2020, at 4:13 PM, yary wrote:
>
> > Now, does anyone have a simpler way than using the ".map" above?
>
> There were a few in the thread!
>
> Here's my golfing, unlike the others, this preserves the order of the lines
> (which may or may not be desired)
>
> raku -ne '.say if
,3].join(qq~\n~); "
>>> Line 2
>>> Line 8
>>> Line 4
>>> Use of Nil in string context
>>> in block at -e line 1
>>> Use of Nil in string context
>>> in block at -e line 1
>>> Line 11
>>>
>>> and,
On Tue, Aug 25, 2020 at 2:31 PM Andy Bach
wrote:
> Pretty cool - I didn't know about the bare "$" as a magic state var.
>
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
ers ; Parrot Raiser <1parr...@gmail.com>;
ToddAndMargo ; Andy Bach ;
Curt Tilmes
Subject: Re: print particular lines question
> Now, does anyone have a simpler way than using the ".map" above?
There were a few in the thread!
Here's my golfing, unlike the others, this preserve
in block at -e line 1
>>
>> a
>>
>> Andy Bach, BS, MSCMECFA
>> Systems Mangler
>> Internet: andy_b...@wiwb.uscourts.gov
>> Voice: (608) 261-5738, Cell: (608) 658-1890
>>
>> "The three great problems of computer science:
>> compi
ne' errors".
> https://martinfowler.com/bliki/TwoHardThings.html
>
> --
> *From:* Andy Bach
> *Sent:* Tuesday, August 25, 2020 12:18 PM
> *To:* Parrot Raiser <1parr...@gmail.com>
> *Cc:* perl6-users ; ToddAndMargo <
> toddandma..
_
From: Andy Bach
Sent: Tuesday, August 25, 2020 12:18 PM
To: Parrot Raiser <1parr...@gmail.com>
Cc: perl6-users ; ToddAndMargo
Subject: Re: print particular lines question
On Win10
C:\>type lines.txt | "\Program Files (x86)\rakudo\bin\raku.exe" -ne "say
lines()[1
f computer science:
compiler complexity and 'off-by-one' errors".
https://martinfowler.com/bliki/TwoHardThings.html
From: Parrot Raiser <1parr...@gmail.com>
Sent: Tuesday, August 25, 2020 11:22 AM
To: Andy Bach
Cc: perl6-users ; ToddAndMargo
Subjec
(608) 658-1890
>
> Every man has the right to an opinion but no man
> has a right to be wrong in his facts. Nor, above all,
> to persist in errors as to facts. Bernard Baruch
>
> ________
> From: ToddAndMargo via perl6-users
> Sent: Monday, August 24, 2
errors as to facts. Bernard Baruch
From: ToddAndMargo via perl6-users
Sent: Monday, August 24, 2020 9:35 PM
To: perl6-users
Subject: print particular lines question
Hi All,
I seems I should know how to do this, but
I am drawing a blank.
$ cat Lines.txt | raku -ne 's
On Mon, Aug 24, 2020 at 11:08 PM ToddAndMargo via perl6-users
wrote:
On 2020-08-24 19:35, ToddAndMargo via perl6-users wrote:
Hi All,
I seems I should know how to do this, but
I am drawing a blank.
$ cat Lines.txt | raku -ne 'say $_;'
Line 1
Line 2
Line 3
Line 4
Line 5
Line 6
Line 7
Line 8
$ cat Lines.txt | raku -e '.say for lines()[3,2,5]'
On Mon, Aug 24, 2020 at 11:08 PM ToddAndMargo via perl6-users
wrote:
>
> On 2020-08-24 19:35, ToddAndMargo via perl6-users wrote:
> > Hi All,
> >
> > I seems I should know how to do this, but
> > I am drawing a blank.
> >
> > $ cat Lines.txt |
On 2020-08-24 19:35, ToddAndMargo via perl6-users wrote:
Hi All,
I seems I should know how to do this, but
I am drawing a blank.
$ cat Lines.txt | raku -ne 'say $_;'
Line 1
Line 2
Line 3
Line 4
Line 5
Line 6
Line 7
Line 8
Line 9
Line 10
Line 11
I want to print liens 1, 3, and 7.
Assigning
Hi All,
I seems I should know how to do this, but
I am drawing a blank.
$ cat Lines.txt | raku -ne 'say $_;'
Line 1
Line 2
Line 3
Line 4
Line 5
Line 6
Line 7
Line 8
Line 9
Line 10
Line 11
I want to print liens 1, 3, and 7.
Assigning `my @x=$_.lines` puts everything into $x[0]
Many thanks,
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