> I noted it over on the survey, but the things I would
> like to see upcoming are
>
> 1) documentation that is written for both the beginner
> and the advanced user. Currently, it is only written
> for the advanced user, who does not need it. The
> documentation should eventual be on par with Per
On 2020-08-25 16:18, William Michels via perl6-users wrote:
Reposting this from Rakudo Weekly News:
2020.34 Another Survey Time [by liztormato]
"It's that time of the year again! Time for the yearly Raku User
Survey! Please fill in the survey so that the Raku Community can
better tweak the Raku
Reposting this from Rakudo Weekly News:
2020.34 Another Survey Time [by liztormato]
"It's that time of the year again! Time for the yearly Raku User
Survey! Please fill in the survey so that the Raku Community can
better tweak the Raku experience. Kudos to JJ Merelo for organizing
this once again
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 $+
Funny, I didn't see anyone compute an offset. Could you point it out?
I'm interested.
Anyway, I golfed it a little bit with a whatever-star. Below you can
preserve or rearrange the order of returned lines (#1, and #2). And
you offset using whatever value you'd like (#3):
#1
~$ raku -e '$*IN.lines
On Tue, Aug 25, 2020 at 2:31 PM Andy Bach
wrote:
> Pretty cool - I didn't know about the bare "$" 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 S
> this preserves the order of the lines (which may or may not be desired)
raku -ne '.say if $++ == any 6,3,1' line0-10.txt
So there is no "$."/current input line # built-in? I started with
# cat /tmp/lines.txt | perl -ne 'print if $. == 1 or $. == 3 or $. == 7'
but couldn't find a $. raku-ism
> 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 $++ == any 6,3,1' line0-10.txt
-y
On Tue, Aug 25, 2020 at 12:03 PM
If Todd wants to print lines containing "Line 1", "Line 3", and "Line 7",
he's going to have to correct for zero-indexing:
user@book:~$ raku -e '$*IN.lines[ 1,3,7 ].join("\n").put;' < Lines.txt
Line 2
Line 4
Line 8
#Below: subtracting one from (1,3,7) gives the return he wants:
user@book:~$ raku
Ah, I see, the -n reads a line and then my lines on $*IN starts with the next
one
C:\> type lines.txt | "\Program Files (x86)\rakudo\bin\raku.exe" -e "my @x =
$*IN.lines(); say @x[0,1,7,3]; "
(Line 0 Line 1 Line 7 Line 3)
and so $*IN is the default for lines()
C:\> type lines.txt | "\Program F
On Win10
C:\>type lines.txt | "\Program Files (x86)\rakudo\bin\raku.exe" -ne "say
lines()[1,7,3]; "
(Line 2 Line 8 Line 4)
(Line 11 Nil Nil)
C:\>type lines.txt | "\Program Files (x86)\rakudo\bin\raku.exe" -ne "say
lines()[1,7,3].join(qq~\n~); "
Line 2
Line 8
Line 4
Use of Nil in string conte
That will golf a little (and improve it) to:
$ raku -e '.say for lines()[3,2,5]' lines.txt
but you have to remember that it's zero-based. I used the first sample
file and got
Line 4
Line 3
Line 6
"The three great problems of computer science: compiler complexity and
'off-by-one' errors".
On 8/
> Assigning `my @x=$_.lines` puts everything into $x[0]
Trying this on windows
C:\> raku.exe -e "my @x = 'lines.txt'.IO.lines; say @x[1,7,3].join(qq~\n~); "
Line 1
Line 7
Line 3
or
C:\> raku.exe -e " say 'lines.txt'.IO.lines[1,7,3].join(qq~\n~); "
Line 1
Line 7
Line 3
a
Andy Bach, BS, MSCME
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