Re: Help reg printing non printable hex characters

If you put \xd1 on the command line, your program will see that literally. In order to match it literally, you have to say

use constant HEXD1 => "\\xd1";

Or something like that. You're right that the code is a little strange. I think you'll find it much simpler to say:

    # from the command line
    perl d1
    perl d3

    # in the code
    my $arg = hex(shift @ARGV);
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update: almut is absolutely correct, that should read

    my $arg = chr(hex(shift @ARGV));
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or even

    my $arg = chr hex shift;
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... but I didn't want to obsfuscate the code unnecessarily (shift of what?)

• another intruder with the mooring in the heart of the Perl

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Re^2: Help reg printing non printable hex characters by almut (Canon) on Jun 18, 2008 at 08:27 UTC
`# in the code my $arg = hex(shift @ARGV);` [download] Wouldn't that rather be `my $arg = chr hex(shift @ARGV);` [download] (`hex` gives a number (e.g. 209 for "d1"), but it seems the OP actually wants the respective char, i.e. `chr(209)`... ) BTW, another possibility would be `my $sep = pack "H2", (shift @ARGV); # with input being 'd1', for exam +ple` [download] Or, if you insist on specifying the `\x` prefix on input, you could extract the hex part with a regex `my $sepArg = shift @ARGV; my ($hex) = $sepArg =~ /\\x([\da-fA-F]+)/; my $sep = chr hex $hex; my $str = "field1 $sep field2";` [download] Update: in theory, you could also do `my $sepArg = shift @ARGV; # input being '\xd1', for example my $str = eval qq("field1 $sepArg field2");` [download] but don't do that if your user input comes from untrusted sources... (any code could be executed!)	[reply] [d/l] [select]
Re^3: Help reg printing non printable hex characters by user1357 (Initiate) on Jun 18, 2008 at 14:02 UTC
Hi All, Thanks a lot for support and guidance. my original requirement is to get the data from an oracle table and prepare an extract with the configured column and line seperators. input is configuration purpose only. anyways i will avoid the spl characters. once again Thanks a lot.	[reply]