@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/

In reply to Re^3: using command line switches to edit file by holli
in thread using command line switches to edit file by kitty

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