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=begin React :component<HeaderCol> :id<menu> 
=para L<Documentation|/doc/introduction>
=para L<Modules| /mods>
=para L<Examples| file:../examples/index.podlite>
=para L<Download |file:../download/index.podlite>
=para L<About|file:../about/index.podlite>
=para 🔍 K<⌘K>/K<ctrl-K>
=end React


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# This handy table was partially borrowed from
# https://metacpan.org/pod/Lingua::Conjunction
my constant %language =
    af => Map.new((  :last,  con => 'en',  dis => 'of'    )),
    da => Map.new((  :last,  con => 'og',  dis => 'eller' )),
    de => Map.new((  :last,  con => 'und', dis => 'oder'  )),
    en => Map.new((  :last,  con => 'and', dis => 'or'    )),
    es => Map.new((  :last,  con => 'y',   dis => 'o'     )),
    fi => Map.new((  :last,  con => 'ja',  dis => 'tai'   )),
    fr => Map.new(( :!last,  con => 'et',  dis => 'ou'    )),
    it => Map.new((  :last,  con => 'e',   dis => 'o'     )),
    la => Map.new((  :last,  con => 'et',  dis => 'vel'   )),
    nl => Map.new((  :last,  con => 'en',  dis => 'of'    )),
    no => Map.new(( :!last,  con => 'og',  dis => 'eller' )),
    pt => Map.new((  :last,  con => 'e',   dis => 'ou'    )),
    sw => Map.new((  :last,  con => 'na',  dis => 'au'    )),
;

my sub conjunction (
    *@els,
    Str:D  :$lang                     = 'en',
    Str:D  :$sep is copy              = ',',
    Str:D  :$alt                      = ';',
    Str:D  :$con                      = %language{ $lang }<con>,
    Str:D  :$dis                      = %language{ $lang }<dis>,
    Bool:D :$last                     = %language{ $lang }<last>,
    Str:D  :$type where any(<and or>) = 'and',
    Str:D  :$str                      = '|list|',
--> Str:D) is export {
    my $sep-word := $type eq 'and' ?? $con !! $dis;
    $sep = $alt if @els.grep(/$sep/);

    my $list = do given @els.elems {
        when 0 { ''                       }
        when 1 { @els[0]                  }
        when 2 { @els.join(" $sep-word ") }
        default {
            @els[0..*-2].join("$sep ")
            ~ "{$last ?? $sep !! ''} $sep-word @els[*-1]";
        }
    }

    $str
      .subst(
        / '[' (<-[|]>*) '|' (<-[\]]>*) ']'/,
        { @els.elems == 0 || @els.elems > 2 ?? $1 !! $0 }, :g
      )
      .subst('|list|', $list, :g)
}



Lingua::Conjunction - Convert lists into linguistic conjunctions and fill them into a template


=begin code :lang<raku>

use Lingua::Conjunction;

say conjunction <chair>; # chair
say conjunction <chair spoon>; # chair and spoon
say conjunction <chair spoon window>; # chair, spoon, and window

# "Tom, a man; Tiffany, a woman; and GumbyBRAIN, a bot"
say conjunction 'Tom, a man', 'Tiffany, a woman', 'GumbyBRAIN, a bot';

# These are reports for May, June, and August
say conjunction <May June August>, :str('These [is|are] report[|s] for |list|');

# "Jacques, un garcon; Jeanne, une fille et Spot, un chien"
say conjunction 'Jacques, un garcon', 'Jeanne, une fille', 'Spot, un chien',
    :lang<fr>;

=end code


Provides a way to make it easy to prepare a string containing a list of items,
where that string is meant to be read by a human.


=begin code :lang<raku>

say conjunction <chair spoon>;
say conjunction <May June August>, :str('Report[|s] for |list|'),
    :lang<fr>, :!last, :sep<·>, :alt<°>, :con<aaand>, :dis<ooor>, :type<or>;

=end code


Returns a string with the given list of items joined based on the
configuration specified by the named arguments, which are as follows:


Specifies an alternative separator to use when at least one of the items
contains C<sep> separator. B<Defaults to> C<;> (a semicolon).


Short for B<con>junction. The term to use when joining the last item
to the previous one, when C<type> argument is set to value C<and>.
B<By default> is set based on value of C<lang> argument.


Short for B<dis>junction. The term to use when joining the last item
to the previous one, when C<type> argument is set to value C<or>.
B<By default> is set based on value of C<lang> argument.


Takes a string representing the code of the language to use. This will
pre-set C<con>, C<dis>, and C<last> arguments. B<Defaults to> C<en>.
Currently supported languages and the defaults they pre-set are as follows
(language is the first two-letter key on the left; that's what you'd
specify as C<lang> argument):


table_head

table_row

table

=begin table
lang | last  | con | dis |
-----|-------|-----|-----|
af   | True  | en  | of
da   | True  | og  | eller
de   | True  | und | oder
en   | True  | and | or
es   | True  | y   | o
fi   | True  | ja  | tai
fr   | False | et  | ou
it   | True  | e   | o
la   | True  | et  | vel
nl   | True  | en  | of
no   | False | og  | eller
pt   | True  | e   | ou
sw   | True  | na  | au
=end table


Specifies whether to use C<sep> when joining the penultimate and last elements
of the list, when the number of elements is more than 2. In English, this
is what's known as L<Oxford Comma|https://en.wikipedia.org/wiki/Serial_comma>.
B<By default> is set based on value of C<lang> argument.


The primary item separator to use. B<Defaults to> C<,> (a comma).


Specifies a template to use when generating the string. You can use
special sequence C<[|]> (e.g. C<octop[us|i]>) where string to the left of
the C<|> will be used when the list contains just one item and the string to
the right will be used otherwise. The other special sequence is
C<|list|> that can will be replaced with the "conjuncted" items of the list.
B<Defaults to> C<|list|>.


Takes either value C<and> or value C<or>. Specifies whether words
specified by C<con> or by C<dis> arguments should be used when joining the
last two elements of the list.


This module was inspired by Perl's
L<Lingua::Conjunction|https://metacpan.org/pod/Lingua::Conjunction> and
and L<List::ToHumanString|https://metacpan.org/pod/List::ToHumanString>.
Some of the internal data was shamelessly ~~stolen~~ borrowed from
L<Lingua::Conjunction|https://metacpan.org/pod/Lingua::Conjunction>'s guts.


The rest is by Zoffix Znet (http://zoffix.com/)


This library is free software; you can redistribute it and/or modify it under the Artistic License 2.0.


Conjunction

my role Containing does Iterator {
    has Iterator $!iterator   is built;
    has Any      $!needle     is built;
    has          $!ignorecase is built;
    has          $!ignoremark is built;
#    has int      $!linenr  is built;  # XXX natives don't work in roles

    method is-lazy() { $!iterator.is-lazy }
}

my class Contains does Containing {
    has Callable $!produce is built;
    has int      $!linenr  is built;

    method pull-one() {
        my $iterator := $!iterator;
        my $needle   := $!needle;

        ++$!linenr
          until (my $line := $iterator.pull-one) =:= IterationEnd
             || $line.contains($needle);

        $line =:= IterationEnd ?? IterationEnd !! $!produce($!linenr, $line)
    }
}

my class Contains::im does Containing {
    has Callable $!produce is built;
    has int      $!linenr  is built;

    method pull-one() {
        my $iterator   := $!iterator;
        my $needle     := $!needle;
        my $ignorecase := $!ignorecase;
        my $ignoremark := $!ignoremark;

        ++$!linenr
          until (my $line := $iterator.pull-one) =:= IterationEnd
             || $line.contains($needle, :$ignorecase, :$ignoremark);

        $line =:= IterationEnd ?? IterationEnd !! $!produce($!linenr, $line)
    }
}

my class Contains::kv does Containing {
    has int $!linenr is built;
    has Str $!line;

    method pull-one() {
        my $iterator   := $!iterator;
        my $needle     := $!needle;
        my $ignorecase := $!ignorecase;
        my $ignoremark := $!ignoremark;

        with $!line -> $line {
            $!line := Str;
            $line
        }
        else {
            ++$!linenr
              until (my $line := $iterator.pull-one) =:= IterationEnd
                 || $line.contains($needle, :$ignorecase, :$ignoremark);

            if $line =:= IterationEnd {
                IterationEnd
            }
            else {
                $!line := $line;
                $!linenr
            }
        }
    }
}

my class Grep does Containing {
    has Callable $!produce is built;
    has int      $!linenr  is built;

    method pull-one() {
        my $iterator := $!iterator;
        my &lookup   := $!needle;

        ++$!linenr
          until (my $line := $iterator.pull-one) =:= IterationEnd
             || lookup($line);

        $line =:= IterationEnd ?? IterationEnd !! $!produce($!linenr, $line)
    }
}

my class Grep::kv does Containing {
    has int $!linenr is built;
    has Str $!line;

    method pull-one() {
        my $iterator := $!iterator;
        my &lookup   := $!needle;

        with $!line -> $line {
            $!line := Str;
            $line
        }
        else {
            ++$!linenr
              until (my $line := $iterator.pull-one) =:= IterationEnd
                 || lookup($line);

            if $line =:= IterationEnd {
                IterationEnd
            }
            else {
                $!line := $line;
                $!linenr
            }
        }
    }
}

my sub produce($p, $k) {
    $p
      ?? -> $linenr, $line { Pair.new: $linenr, $line }
      !! $k
        ?? -> $linenr, $ { $linenr }
        !! -> $, $line { $line }
}

proto sub lines-containing(|) is export {*}
multi sub lines-containing(
  Iterator:D $iterator,
  Any:D      $needle,
  :$p, :$k, :$kv, :$v,
  :i(:$ignorecase), :m(:$ignoremark),
  :offset($linenr) = 0
--> Seq:D) {
    Seq.new: Callable.ACCEPTS($needle) && !Regex.ACCEPTS($needle)
      ?? $kv
        ?? Grep::kv.new(
             :$iterator, :$needle, :$linenr
           )
        !! Grep.new(
             :$iterator, :$needle, :produce(produce($p, $k)), :$linenr
           )
      !! $kv
        ?? Contains::kv.new(
             :$iterator, :$needle, :$ignorecase, :$ignoremark, :$linenr
           )
        !! $ignorecase || $ignoremark
          ?? Contains::im.new(
               :$iterator, :$needle, :produce(produce($p, $k)), :$linenr
               :$ignorecase, :$ignoremark
             )
          !! Contains.new(
               :$iterator, :$needle, :produce(produce($p, $k)), :$linenr
             )
}
multi sub lines-containing(Seq:D $seq, Any:D $needle, *%_ --> Seq:D) {
    lines-containing($seq.iterator, $needle, |%_)
}
multi sub lines-containing(@lines, Any:D $needle, *%_ --> Seq:D) {
    lines-containing(@lines.iterator, $needle, |%_)
}
multi sub lines-containing(
        %map,
  Any:D $needle,
  :$p, :$k, :$kv, :$v, :i(:$ignorecase), :m(:$ignoremark), :$offset = 0
--> Seq:D) {
    my &producer := produce($p, $k);

    # NOTE: this depends on a hash producing keys and values in the
    # same order if the hash is unchanged
    my @keys = %map.keys;
    lines-containing(
      %map.values.iterator, $needle, :p, :$ignorecase, :$ignoremark, :$offset
    ).map: {
        producer @keys.AT-POS(.key), .value
    }
}
multi sub lines-containing(Any:D $source, Any:D $needle, *%_ --> Seq:D) {
    lines-containing($source.lines.iterator, $needle, |%_)
}



Lines::Containing - look for lines containing a given needle


=begin code :lang<raku>

use Lines::Containing;

# lines with an "a"
.say for lines-containing("foo\nbar\nbaz", "a")  # bar␤baz␤

# lines ending on "r", with their line number
.say for lines-containing("foo\nbar\nbaz", / r $/, :kv);  # 1␤bar␤

# line numbers of lines starting with "f", starting at 1
.say for lines-containing("foo\nbar", *.starts-with("b"), :k, :offset(1));  # 2␤

=end code


Lines::Containing exports a single subroutine C<lines-containing> that can
either take a C<Seq> or C<Iterator> producing lines, an array with lines,
a C<Hash> (or C<Map>) with lines as values, or any other object that supports
a C<lines> method producing lines (such as C<Str>, C<IO::Path>, C<IO::Handle>,
C<Supply>) as the source to check.


As the second parameter, it takes either a C<Cool> object, a regular
expression, or a C<Callable> as the needle to search for.


It returns a (potentially lazy) C<Seq> of the lines that contained the
needle.


Additionally, it supports the following named arguments:


Produce C<Pair>s with the line number (or the key in case of a C<Hash>) as
the key.


Produce line numbers only, or keys only in case of a C<Hash>.


Produce line number (or key in case of a C<Hash>) and line alternately.


Ignore case (only if the needle is a C<Str>).


Ignore mark (only if the needle is a C<Str>).


The line number of the first line in the source (defaults to B<0>).


Source can be located at: https://github.com/lizmat/Lines-Containing .
Comments and Pull Requests are welcome.


If you like this module, or what I’m doing more generally, committing to a
L<small sponsorship|https://github.com/sponsors/lizmat/>  would mean a great
deal to me!


Containing

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=begin React :component<HeaderCol> :id<footer>  
=begin nested :!nested
=item1 B<Language>
    =item2 L<Get started|file:../getting-started/getting-started.podlite>
    =item2 L<Why Raku?|/doc/language/faq#Why-should-I-learn-Raku-What's-so-great-about-it>
    =item2 L<Try Raku|https://glot.io/new/raku>
    =item2 L<Raku cheat sheet|https://github.com/Raku/mu/blob/master/docs/Perl6/Cheatsheet/cheatsheet.txt>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<Raku on Exercism|https://exercism.org/tracks/raku>
    =item2 L<Wikipedia|https://en.wikipedia.org/wiki/Raku_(programming_language)>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>

=end nested
=begin nested :!nested

=item1 B<L<Documentation|/doc>>
    =item2 L<Getting started, Migration guides from other languages, & Tutorials | file:../doc/introduction.podlite>
    =item2 L<Language References|file:../doc/reference.podlite>
    =item2 L<Type Reference| file:../doc/types.podlite>
    =item2 L<Miscellaneous| file:../doc/miscellaneous.podlite>
    =item2 L<FAQs (Frequently Asked Questions)|/doc/language/faq>
    =item2 L<Community|/doc/language/community>
    =item2 L<The list of all documents|file:../doc/index.podlite>

=item1 B<Resources>
    =item2 L<The Raku Guide|https://raku.guide/>
    =item2 L<Books |https://perl6book.com/>
    =item2 L<Rosetta Code | https://www.raku.org/community/rosettacode>

=end nested
=begin nested :!nested

=item1 B<Resoures>
    =item2 L<Download | file:../download/index.podlite>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
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=item1 B<Learning>
    =item2 L<The Raku Guide|https://raku.guide/>
    =item2 L<Wikibook |https://en.wikibooks.org/wiki/Raku_Programming>
    =item2 L<Books |https://perl6book.com/>
    =item2 L<Rosetta Code | https://www.raku.org/community/rosettacode>
    =item2 L<Learn Raku in Y minutes|https://learnxinyminutes.com/docs/raku/>
    =item2 L<Golfing |https://github.com/AlexDaniel/raku-golf-cheatsheet>
=end nested
=begin nested :!nested

=item1 B<Explore>
    =item2 L<Raku Blog Aggregator|https://planet.raku.org/>
    =item2 L<Rakudo Weekly|https://rakudoweekly.blog/>
    =item2 L<The Weekly Challenge |https://perlweeklychallenge.org/>
    =item2 L<Raku Advent Calendar|https://raku-advent.blog/>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>

=end nested
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README

NAME

SYNOPSIS

DESCRIPTION

AUTHOR

COPYRIGHT AND LICENSE

Lines::Containing v0.0.1

Authors

License

Dependencies

Test Dependencies

Provides

Documentation