Hi, I have to print the particular column from file. I have tried the below code

my @header=qw/studentrecord primary_ins primary_ins_type/;
my @wanted_fields = @header;
open(DATA, "sample_1.csv") or die "Could not open file $!";
my @fields = split /,/, <DATA>;
chomp @fields;
while (<DATA>) {
    chomp;
    my %row;
    @row{@fields} = split /,/;
    my @wanted_data = map {$row{$_}} @wanted_fields;
    print join(",", @wanted_data), "\n";
}
[download]

The above code is working fine if I give the field name in the header array(@header). But when I try to get the header value from file and assign that to @header, is not working properly.

open (FH, "< sample_1_header.csv") or die "Can't open file for read: $
+!";
my @header=<FH>;
my $i=0;
foreach(@header)
{
my @array=$header[$i];
print @array;
my @wanted_fields = @array;
open(DATA, "sample_1.csv") or die "Could not open file $!";
my @fields = split /,/, <DATA>;
chomp @fields;
#print Dumper \@fields;

while (<DATA>) {
    chomp;
    my %row;
    @row{@fields} = split /,/;
    my @wanted_data = map {$row{$_}} @wanted_fields;
    print join(",", @wanted_data), "\n";
}
$i++;
}
[download]

And throws the below error. Use of uninitialized value $wanted_data[0] in join or string at samp_1.pl line 39, <DATA> line 98. Let me know your thoughts on this.

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