Re^3: Enlarging scalars

use strict; use warnings; 
{
  print "using exterior values\n"; 
  my $y=1; 
  my $z=1; 
  my $hoeveel=5; 
  for (my $i=1; $i <= $hoeveel; $i++) {
     $y = $y + 155;
     $z = $z +1;
     print "$y $z\n"; 
  };
}

{
  print "using localizing interior values\n"; 
  my $y=1; 
  my $z=1; 
  my $hoeveel=5; 
  for (my $i=1; $i <= $hoeveel; $i++) {
     my $y = $y + 155;
     my $z = $z +1;
     print "$y $z\n"; 
  };
}
[download]

Result

using exterior values
156 2
311 3
466 4
621 5
776 6
using localizing interior values
156 2
156 2
156 2
156 2
156 2
[download]

Comment on Re^3: Enlarging scalars Select or Download Code

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Re^4: Enlarging scalars by WisDomSeeKer34 (Sexton) on Jun 12, 2017 at 13:44 UTC
I did what you did and left out the "my" but it didn't work. I get the same values for $y and $z. Look where the $y and $z scalars are located. They are in the $a scalar. The values in the $a scalar needs to be changed.	[reply]
Re^5: Enlarging scalars by talexb (Chancellor) on Jun 12, 2017 at 13:53 UTC
You'll probably hear this a couple of times .. but telling us that a solution "didn't work" isn't a useful description of what did work. Re-declaring new `$x` and `$y` variables makes local copies of those variables. Removing the `my` removes that issue, and should have solved the issue that you were having. Show us the new code that "doesn't work" and we'll help you again -- but please, in future :) tell us more than just something "doesn't work". Alex / talexb / Toronto Thanks PJ. We owe you so much. Groklaw -- RIP -- 2003 to 2013.	[reply] [d/l] [select]
Re^5: Enlarging scalars by Corion (Patriarch) on Jun 12, 2017 at 13:52 UTC
Yes - huck solved one of your problems, but there are many problems in your code. See {choroba]s advice, or alternatively think about when Perl interpolates `$z` (and the other variables) into your string. Printing your string `$a` at the various steps might help you understand when interpolation happens. Perl interpolates strings at the time of mention, so by first calculating `$z` and then assigning to `$a` you should be able to solve the other problem.	[reply] [d/l] [select]
Re^5: Enlarging scalars by huck (Prior) on Jun 12, 2017 at 13:51 UTC
Well of course the values in $a get captured when the assignment is made. What do you think was going to happen? for (my $i=1; $i <= $hoeveel; $i++) { $y = $y + 155; $z = $z +1; print <<EOT; <g transform="translate(-124.85653,$y)" id="layer$z"> <text xml:space="preserve" style="font-style:normal;font-variant:normal;font-weight:normal +;font-stretch:normal;font-size:126.0375061px;line-height:125%;font-fa +mily:Arial;-inkscape-font-specification:'Arial, Normal';text-align:st +art;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-ancho +r:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stro +ke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" x="-45.714272" y="235.21936" id="text3336"><tspan id="tspan3338" x="-45.714272" y="235.21936">a</tspan></text> </g> EOT }; [download]	[reply] [d/l]