Re^2: printing 20 characters in a line.


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Re^2: printing 20 characters in a line.

by heidi (Sexton)

on Nov 14, 2008 at 05:11 UTC ( [id://723563]=note: print w/replies, xml )

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in reply to Re: printing 20 characters in a line.
in thread printing 20 characters in a line.

I got it... how is this one???

#!/usr/bin/perl
my $str="30 30 36 33 36 36 36 33 36 34 26 24 21 17 17 23 27 27 31 31 3
+4 33 33 33 36 36 37 38 38 38 38 38 35 40 34 34 34 31 37 36 37 37 40 4
+0 49 40 40 40 40 40 40 40 40 33 30 30 30 30 30 42 45 45 45 45 45 49 4
+2 42";
@s=split(/ /,$str);
for($i=1;$i<=scalar(@s);$i++) {
print "$s[$i] ";
if($i%20==0) {
print "\n";
}
}
print "\n";
[download]

simple uh.. y didnt i think abt it when i tried first :)

Comment on Re^2: printing 20 characters in a line. Download Code

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Re^3: printing 20 characters in a line.
by ikegami (Patriarch) on Nov 14, 2008 at 06:06 UTC

You skip the first element.
You print an extra element (undef) at the end. use warnings; would have caught that.
The use of scalar there is unnecessary.
You really should use use strict;.
for (my $i=0; $i<@s; $i++)
is a rather complex way of saying
for my $i (0..$#s)

I had a bug in mine too (leading space)

#!/usr/bin/perl
use strict;
use warnings;
my $str = "30 30 36 33 36 36 36 33 36 34"
        ." 26 24 21 17 17 23 27 27 31 31"
        ." 34 33 33 33 36 36 37 38 38 38"
        ." 38 38 35 40 34 34 34 31 37 36"
        ." 37 37 40 40 49 40 40 40 40 40"
        ." 40 40 40 33 30 30 30 30 30 42"
        ." 45 45 45 45 45 49 42 42";
my @str = split(/ /, $str);
my $nl = 1;
for my $i (0..$#str) {
   if    ($i == 0     ) { $nl = 0;              }
   elsif ($i % 20 == 0) { $nl = 1; print("\n"); }
   else                 { $nl = 0; print(" ");  }
   print($str[$i]);
}
print("\n") if !$nl;
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Tested.

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