Using perl (v5.24.0) I am reading a file line by line processing each line in while loop.

As I have newlines at the end of each line in the file, I want to remove those newlines from every line I read in. But when I am using chomp, something I didn't expect is happening. I am not able to find why it's happening but I suspect the way I am reading the file might be responsible for it.

#!$HOME/localperl/bin/perl use strict; use warnings; use diagnostics; my $file = "test1.csv"; open(my $fh, "<", $file) or die "Could not open file '$file' $!\n"; my @local; print "Before while \@local: @local\n"; while (my $line = <$fh>) { print "Before chomp \$line: $line\n"; #chomp($line); print "After chomp \$line: $line\n"; push @local, $line; print "After push \@local: @local\n"; } print "After while \@local: @local\n"; close $fh;

Contents of test1.csv:

12.2(17d)SXB11 5.10 Generic_118855-15 XYZ 7.1

When I run the code with chomp commented out, I get following output

Before while @local: Before chomp $line: 12.2(17d)SXB11 After chomp $line: 12.2(17d)SXB11 After push @local: 12.2(17d)SXB11 Before chomp $line: 5.10 Generic_118855-15 After chomp $line: 5.10 Generic_118855-15 After push @local: 12.2(17d)SXB11 5.10 Generic_118855-15 Before chomp $line: XYZ 7.1 After chomp $line: XYZ 7.1 After push @local: 12.2(17d)SXB11 5.10 Generic_118855-15 XYZ 7.1 After while @local: 12.2(17d)SXB11 5.10 Generic_118855-15 XYZ 7.1

Now, as I want to remove the newline from end of each line, when I uncomment chomp, I get:

Before while @local: Before chomp $line: 12.2(17d)SXB11 After chomp $line: 12.2(17d)SXB11 After push @local: 12.2(17d)SXB11 Before chomp $line: 5.10 Generic_118855-15 After chomp $line: 5.10 Generic_118855-15 5.10 Generic_118855-15(17d)SXB11 Before chomp $line: XYZ 7.1 After chomp $line: XYZ 7.1 XYZ 7.1neric_118855-15(17d)SXB11 XYZ 7.1neric_118855-152(17d)SXB11

What am I ignoring here that is causing this behavior? I want to add each line as an array element in the @local after removing newlines. Please forgive me if I am missing something very obvious.


In reply to [SOLVED]: Problem when using chomp on line read from file. by Perl300

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