RE: <> Operator and String Expansion

[Wagner, David --- Senior Programmer Analyst --- WGO]

    Unless you are doing some formatting just use print $_

 

    When you are doing printf $_ and printf is trying to use $_ for for formatting. If you had had strict and warnings, you would have seen that occurring.

 

      if you do printf "%s", $_ then will print.

 

    But you should always use strict and warnings. Saves you a lot of time and energy ( believe me - l know from my past )

 

          If you have any problems or questions, please let me know.

     Thanks.

  Wags ;)
David R Wagner
Senior Programmer Analyst
FedEx Freight
1.408.323.4225x2224 TEL
1.408.323.4449           FAX
http://fedex.com/us

 

---

From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED]
Sent: Wednesday, September 27, 2006 14:39
To: activeperl@listserv.ActiveState.com
Subject: <> Operator and String Expansion

Does anyone know why the following is happening? A solution/workaround would be greatly appreciated!


I have a simple perl program which loops through a file, line by line -- eg:


open FOO,"..."
while (<FOO>)
{
printf $_;
}

my file looks like this:


abc
%abc
abc

etc.


When I run the program, it seems as though Perl attempts to replace '%' with a a variable reference -- for example, the output often looks like this:


abc
0bc
abc

or

abc
0.000000000bc
abc



I've tried replacing '%''s before the printf, but this doesn't work -- the variable expansion seems to occur when the line is assigned to $_


Any thoughts?


Thanks!



Jeff.

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