Greetings, I'm reading in a file containing a single column (representing column names in a table) I.e, FIELD1 FIELD2 FIELDN (each on a separate line) I would like to pass the file into an array and apply work to the array values such that the end result would be a single line 'FIELD1','FIELD2','FIELDN' to be passed in a data base query. I've tried working outside of perl via my $table_fieldname_array=`cat $column_list|xargs|sed -e 's/ /'"'"','"'"'/g'`; which writes the contents of the file as FIELD1','FIELD2','FIELDN which I then attempt to concatenate in perl with (' and ') However the trailing ') ends up on a separate line. My question is two fold; 1 how can i concatenate my string with(' and ') without the ') appearing on a separate line? 

# work around

my $column_list=foofile.txt
my $table_fieldname_list=`cat $column_list|xargs|sed -e 's/ /'"'"','"'
+"'/g'`;

print "see what it looks like: $table_fieldname_list\n";
$table_fieldname_list= "('" . $table_fieldname_list;
$table_fieldname_list = $table_fieldname_list . "')";
print "concatenatd table list $table_fieldname_list\n";

# ends up 
#('FIELD1','FIELD2','FIELDN
#  ')

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2, what might be the perl only solution to read in a file to an array and convert contents of the array to a single line in quotes and separated by ,? 

# Perl code that can be enhanced?
my $column_list=foofile.txt
open (my $fh,"<","$column_list")
 or die "cannot open < $column_list: $!";
my @table_fieldname_array = <$fh>;

# see what it looks like print "field array @table_fieldname_array\n";

# do something to the array for example
foreach my $attr_name (@table_fieldname_array ) {
        $field_list .= $attr_name . ",";
    }
print "the result is the array on separate lines with a trailing , ...
+not useful yet @table_fieldname_array\n";

[download]

In reply to wrap contents of an array in single quotes separated by comma by perl197

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