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Dear Monks,
after some experience in parsing the csv files with split & join I try to use the modul Text::CSV_XS now. I get a problem while trying to print the file if I use getline_hr.
A bit of case history. I need to modify some values in some columns. These columns have always the same name (header) but the are at the different positions in the different csv files. I must therefore access these columns by names.
The first script below works - because I take every column by name and combine them later. This cannot be a solution because as said the required columns can be at different positions in the different files and the number of columns can be different too.
use strict; use warnings; use 5.010; use Text::CSV_XS; my $csv = Text::CSV_XS->new( { binary => 1, sep_char=>';' } ) or die " +Cannot use CSV: ".Text::CSV->error_diag(); my @fields = ('ID', 'NAME','INDICATOR','VALUE','CI_LOW', 'CI_HIGH'); $csv->print( \*STDOUT, \@fields ); say ''; $csv->column_names( $csv->getline( *DATA ) ); while ( my $hr = $csv->getline_hr( *DATA ) ) { my @nr = @{$hr}{'ID'}; s/12/Sun/g for @nr; s/17/Moon/g for @nr; my @name = @{$hr}{'NAME'}; my @ind = @{$hr}{'INDICATOR'}; my @val = @{$hr}{'VALUE'}; my @low = @{$hr}{'CI_LOW'}; my @high = @{$hr}{'CI_HIGH'}; if ($csv->combine ( @nr, @name, @ind, @val, @low, @high)) { print $csv->string, "\n"; } else { print "combine () failed on argument: ", $csv->error_input, "\n"; } } __DATA__ ID;NAME;INDICATOR;VALUE;CI_LOW;CI_HIGH 12;Name1;01;95;89;100 12;Name1;02;75;50;92 12;Name1;03;89;82;96 12;Name2;01;99;98;100 12;Name2;02;95;90;100 12;Name2;03;22;12;32 17;Name1;01;93;83;95 17;Name1;02;78;62;96 17;Name1;03;37;17;57
If I try it the other way the script shows an error:
use strict; use warnings; use 5.010; use Text::CSV_XS; my $csv = Text::CSV_XS->new( { binary => 1, sep_char=>';' } ) or die " +Cannot use CSV: ".Text::CSV->error_diag(); my @fields = ('ID', 'NAME','INDICATOR','VALUE','CI_LOW', 'CI_HIGH'); $csv->print( \*STDOUT, \@fields ); say ''; # $csv->column_names( $csv->getline( *DATA ) ); while ( my $hr = $csv->getline_hr( *DATA ) ) { # my @nr = @{$hr}{'ID'}; s/12/Sun/g for @{$hr}{'ID'}; s/17/Moon/g for @{$hr}{'ID'}; $csv->print (*STDOUT, $hr) or $csv->error_diag; } __DATA__ ID;NAME;INDICATOR;VALUE;CI_LOW;CI_HIGH 12;Name1;01;95;89;100 12;Name1;02;75;50;92 12;Name1;03;89;82;96 12;Name2;01;99;98;100 12;Name2;02;95;90;100 12;Name2;03;22;12;32 17;Name1;01;93;83;95 17;Name1;02;78;62;96 17;Name1;03;37;17;57
The error message is: Expected fields to be an array ref at ...
It is correct since by using geline_hr it is hash reference not array reference.
I tried it the way as [%$hr] - but no success.
Your help is very much appreciated!
Thanks in advance.
VE

In reply to How to print after using getline_hr (Text::CSV_XS)? by vagabonding electron

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