Re^2: using command line switches to edit file

The test-file contents are of the form :

<PROP GUID="471138786526914052" EXPR="≪E The_Rounding_Unit=&Quot;1e-16&Quot; Absolute_Error_Tolerance=&Quot;1e-15&Quot; /&Gt";"/>

How do i extract the numerical values (in bold) from the above fileformat? I need to substitute it with the user input from the command line.

while (<INFO>)
{
  @line=<INFO>; #will this help ?
  my @new2;
  if($var{param}) { list_param($var{param}); }
  if($var{the})   { list_the($var{the}); }

sub list_param($)
{        
   if ($line =~ m:Absolute_Error_Tolerance=&quot:)
      {
          $line=$line1;
          @new2=split(/\&quot;/,$line1);
          $line1=~s/$new2[1]/$G{param}/;
       }
}
[download]

Comment on Re^2: using command line switches to edit file Download Code

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Re^3: using command line switches to edit file by holli (Abbot) on Feb 13, 2006 at 14:13 UTC
@line=<INFO>; #will this help ? Not at all. That construct will read the whole file into an array lines. That's not what you want here. Have a look at this code. `my $file = $ARGV[0]; my $repl = $ARGV[1]; open INFO, "<", $file or die $!; while (<INFO>) { s/(Absolute_Error_Tolerance=&Quot;)1e-15(&Quot)/$1$repl$2/; print; } close INFO;` [download] That can be easily made into a one-liner: `perl -n -e "s/(Absolute_Error_Tolerance=&Quot;)1e-15(&Quot)/$1$ARGV[0] +$2/; print;" filename` [download] just this doesn't work. You cannot pass additional variables into an -e "code" statement. However, you avoid problem by putting that line into a shell script or batchfile (here windows batchfile, as i have no idea of shell scripts). `@echo off perl -n -e "s/(Absolute_Error_Tolerance=&Quot;)1e-15(&Quot)/$1%2$2/; p +rint;" %1` [download] So you can then call that file using `batchfilename datafile replacement` [download] Note: The %1 and %2 are no perl hashes but variables from the shell. They get substituted by the command line values before! the script is run. holli, /regexed monk/	[reply] [d/l] [select]
Re^4: using command line switches to edit file by kitty (Novice) on Feb 13, 2006 at 16:53 UTC
Thankyou :) ..	[reply]