First part of my previous email on this thread! Re-read this bit
> First, you were looking at the docs for Path's "lines", but you are
> using a string "lines" and those docs say
>
> multi method lines(Str:D: $limit, :$chomp = True)
> multi method lines(Str:D: :$chomp = True)
>
> Files get "nl-in" due to the special case of text files having various
> line endings to tweak.
>
> Strings already have "split" and "comb" for all the flexibility one may
> need there, and what you're playing with is more naturally
> dd $_ for $x.split("\t"); # "a","b", ... removes \t
> dd $_ for $x.split(/<?after \t>/); "a\t","b\t", ....
and restating the above: "string".lines is different a different method
from "File.txt".IO.lines, which is also different from
"File.txt".IO.open.lines . Yes that's confusing but there are reasons for
all that which make sense when one thinks about them a while.
So if you want to split a string, use split!
If you want to experiment a text file's line endings with "lines", do that
experiment with a file! Which was the 2nd part of my previous email
> dd $_ for 'line0-10.txt'.IO.lines(:nl-in["i","\n"], :!chomp)[0..3];
> "Li"
> "ne 0\n"
> "Li"
> "ne 1\n"
-y
On Mon, Aug 31, 2020 at 5:12 PM ToddAndMargo via perl6-users <
perl6-us...@perl.org> wrote:
> On 2020-08-30 08:42, yary wrote:
> > You were close!
> >
> > First, you were looking at the docs for Path's "lines", but you are
> > using a string "lines" and those docs say
> >
> > multi method lines(Str:D: $limit, :$chomp = True)
> > multi method lines(Str:D: :$chomp = True)
> >
> > Files get "nl-in" due to the special case of text files having various
> > line endings to tweak.
> >
> > Strings already have "split" and "comb" for all the flexibility one may
> > need there, and what you're playing with is more naturally
> > dd $_ for $x.split("\t"); # "a","b", ... removes \t
> > dd $_ for $x.split(/<?after \t>/); "a\t","b\t", ....
> >
> > Now back to the Path lines, which DOES let you specify line endings
> >
> > methodlines(IO::Path:D::$chomp=True, :$enc='utf8', :$nl-in= ["\x0A",
> > "\r\n"], |c-->Seq:D)
> >
> > $ cat line0-10.txt
> > Line 0
> > Line 1
> > Line 2
> > ...
> >
> > let's pretend that the letter "i" is a line ending.
> > named arguments can be conveniently written colon pairs :-)
> >
> > my $nl-in="i"; dd $_ for 'line0-10.txt'.IO.lines(:$nl-in)[0..3];
> > "L"
> > "ne 0\nL"
> > "ne 1\nL"
> > "ne 2\nL"
> >
> > How about splitting on either "i" or "\n", and not chomping
> >
> > my $nl-in=("i","\n"); dd $_ for 'line0-10.txt'.IO.lines(:$nl-in,
> > :!chomp)[0..3];
> > "Li"
> > "ne 0\n"
> > "Li"
> > "ne 1\n"
> >
> > To put in line endings without having a variable of the same name as the
> > naed arg, use the full form of the colon pair
> > dd $_ for 'line0-10.txt'.IO.lines(:nl-in["i","\n"], :!chomp)[0..3];
> > "Li"
> > "ne 0\n"
> > "Li"
> > "ne 1\n"
> >
> >
> >
> > -y
>
> Hi Yary,
>
> Now what am I doing wrong?
>
> p6 'my $x="a\tb\tc\td\t"; dd $x; for $x.lines(:nl-in["\t", 0x09],
> :!chomp) {dd $_};'
>
> Str $x = "a\tb\tc\td\t"
>
> "a\tb\tc\td\t"
>
> :'(
> -T
>
