in reply to putting commas separated values into a new file line by line

To create a new file, use open. 
open my $out, '>', 'new_file' or die $!;

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If you just need to output the string, you can replace commas by newlines: 

my $runTest = 'sydney,delhi,NY,Russia';
print {$out} $runTest =~ tr/,/\n/r;

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Use say instead of print if you want a newline after Russia.

If you want to store the lines in an array, use split: 

my @lines = split /,/, $runTest;

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BTW, Sydney, Delhi, and NY are cities, while Russia is a country.

map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

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Re^2: putting commas separated values into a new file line by line
by Anonymous Monk on Aug 11, 2020 at 16:58 UTC

    i don't understood completely, i just want to have those command line passed values that are further stored under $runTest in a new file as line by line

    got below error while running the script

    Bareword found where operator expected at ./fileTest.pl line 10, near "tr/,/\n/r"

    syntax error at ./fileTest.pl line 10, near "tr/,/\n/r"

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      What Perl version are you using?

      map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]
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[d/l]
        perl v5.10.1
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