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--- notes:perl_cheat_sheet [2026/06/12 10:00]
114.119.135.121 old revision restored (2026/05/23 13:29)
+++ notes:perl_cheat_sheet [2026/06/13 14:55] (current)
47.245.90.216 old revision restored (2026/06/04 13:11)
@@ Line 92: / Line 92: @@
     print "It was $_ that I saw!\n";
 }</code>
+  * ''print'' takes list of items and sends all to STDOUT (unseparated). ''print @array;'' vs ''print "@array";'' <code perl>print <>;          # source code for 'cat'
+print sort <>;     # source code for 'sort'</code>
+  * C-like printf function %g for number auto-format,%10s, %-10d etc.<code perl>my @items = qw( wilma dino pebbles );
+my $format = "The items are:\n" . ("%10s\n" x @items);
+printf $format, @items;
+printf "The items are:\n".("%10s\n" x @items), @items;
+</code>
+  * Filehandles can be barewords (upper-cased) or variables. Special filehandles are : STDIN, STDOUT, STDERR, DATA, ARGV, and ARGVOUT .<code perl>open CONFIG, '<dino';  # < is optional
+open BEDROCK, '>fred' || die "Cannot open fred: $!";
+open LOG, '>>:encoding(UTF-8)','logfile'; # for perl >= 5.6
+open BEDROCK, '>:crlf', $file_name; # DOS-formatted output
+binmode STDOUT, ':encoding(UTF-8)';</code>
 ===== User Subroutines =====

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