File Handler

snape has asked for the wisdom of the Perl Monks concerning the following question:

Replies are listed 'Best First'.
Re: File Handler by jwkrahn (Abbot) on Feb 01, 2010 at 07:16 UTC
1. This is a Frequently Asked Question. See: How do I pass filehandles between subroutines? and How can I use a filehandle indirectly?	[reply]
Re^2: File Handler by ikegami (Patriarch) on Feb 01, 2010 at 07:19 UTC
Those last two are rather dated, using a global variable for a file handle. They seem to talk a lot when for something that should only be one line of code: `foo($fh);` [download]	[reply] [d/l]
Re: File Handler by ikegami (Patriarch) on Feb 01, 2010 at 07:17 UTC
They are "file handles". Is it possible to pass the same file handler as reference in two different subroutine ? Please Explain because I tried doing it and I wasn't successful. The reason you are having a problem is because you... Where's your code? What is disadvantage of having many file handlers passed to many subroutines ? None.	[reply]
Re: File Handler by rovf (Priest) on Feb 01, 2010 at 12:32 UTC
Is it possible to pass the same file handler as reference in two different subroutine ? `use FileHandle; sub f1 { my $handle=shift; ... } sub f2 { my $handle=shift; ... } my $fh=FileHandle->new(); ... f1($fh); f2($fh);` [download] What is disadvantage of having many file handlers passed to many subroutines ? Depends on your definition of the word many, on the operating system you are using, and whether or not the file handles point to open files. I recently stumbled over the problem, that on Windoze (if we want to call this an "operating system"), having a few hundreds of simultaneously open file handles caused the system to let me open a new one. This has, of course, nothing to do with passing them to subroutines. -- Ronald Fischer <ynnor@mm.st>	[reply] [d/l] [select]