I am a bit ashamed to be confused by this, but here is my problem:

I am looping through some work, and want to print out a status indicator of '.'. Every 10 iterations through the loop I want to print the decade, every 100 iterations I want to print a newline+tab.

The following just prints blanks:

 perl -e 'my $i=0;for (1..456) {print (($i%100)?"":"\n\t"),(($i%10)?".":(int(($i%100)/10)));$i++;};print "\n";'

OUTPUT:

If I change the print LIST to print;print; like this, it works:

perl -e 'my $i=0;for (1..456) {print (($i%100)?"":"\n\t");print (($i%10)?".":(int(($i%100)/10)));$i++;};print "\n";'

OUTPUT:

	0.........1.........2.........3.........4.........5.........6.........7.........8.........9.........
	0.........1.........2.........3.........4.........5.........6.........7.........8.........9.........
	0.........1.........2.........3.........4.........5.........6.........7.........8.........9.........
	0.........1.........2.........3.........4.........5.........6.........7.........8.........9.........
	0.........1.........2.........3.........4.........5.....

The first bit of code is using print to print a list (comma-separated) I think. I think I have all the parens in the correct places to make the order of operation correct, but perl must be applying some other strange order of operation rule that I don't understand.

FYI: perl 5.10.0 on Ubuntu 9.10

In reply to print list, comma not working? by fzellinger

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