in reply to Returning an array in a specific way for csv

Could you be more specific what you want the output to look like? Also, how would the code know when to break apart the input - is it just each "X1" marker that the code encounters, or is it something else like "BEGIN_TAG"? To put that a different way, what should the output for this input look like? (How do I post a question effectively?)

BEGIN_TAG
X1 a b
c d
X1 e f
g h
BEGIN_TAG
X1 i j
k l
X1 m n
o p

[download]

As for the data structure, as one possibility I'd suggest you have a look at "Hashes of Arrays" in perldsc.

Update: For CSV input and output, I'd very strongly recommend Text::CSV.

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Re^2: Returning an array in a specific way for csv
by Arengin (Novice) on Mar 13, 2017 at 16:03 UTC
    I need it to be like 
    test test test; no no no no; yes yes yes
test test testtes test test; no no no no no nono non no nono nonono no
+ no  no; hi hi hi hi hi hi hi hi hi hi hi hi

    [download]
    Like
    X1; X2; X3
    X1; X2; X3

    The BEGIN_TAG is the recuring tag that splits the output lines.
[reply]
[d/l]

      That doesn't answer my question as to what the output for the input I showed should look like.

      #!/usr/bin/env perl
use warnings;
use strict;

my @data;
my %tags;
my $cur_tag;
while (<DATA>) {
    chomp;
    if (/^BEGIN_TAG/)
        { push @data, {} }
    elsif ( my ($tag,$line) = /^(X\S+)\s+(.+)$/ ) {
        $data[-1]{$tag} .= " NewRec " if exists $data[-1]{$tag};
        $data[-1]{$tag} .= $line;
        $tags{$tag}++;
        $cur_tag = $tag;
    }
    elsif ($cur_tag) {
        $data[-1]{$cur_tag} .= " NewLine ".$_;
    }
}

use Text::CSV;
my $csv = Text::CSV->new({binary=>1,auto_diag=>2,eol=>"\n",
    sep_char=>";",always_quote=>1,blank_is_undef=>1});
$csv->print(select, [sort keys %tags]);
for my $row (@data) {
    my @vals = map { $row->{$_} } sort keys %tags;
    $csv->print(select, \@vals);
}

__DATA__
BEGIN_TAG
X1 a b
X2 one two
X4 foo
X1 c d
X3 test
BEGIN_TAG
X1 e f
g h
X2 three four
X4 bar
quz baz
X2 five
six

      [download]

      Output

      "X1";"X2";"X3";"X4"
"a b NewRec c d";"one two";"test";"foo"
"e f NewLine g h";"three four NewRec five NewLine six";;"bar NewLine q
+uz baz"

      [download]
[reply]
[d/l]
[select]
        Except for the first output line which I got rid of it is exactly what I wanted. Thank you very much.
[reply]

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