Re^3: return undef

I think you are confusing the meaning of copying filehandles with that of copying the contents from one file to another.

I am guessing that it is the latter that you really want. I assume that myfunction returns either an open read handle or undef. In this case, you can do something like

my $in = myfunction();
if ( $in ) {
  print FILEHANDLE while <$in>;
}
else {
  # handle null-handle error;
}
[download]

the lowliest monk

Comment on Re^3: return undef Download Code

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Re^4: return undef by dwijew (Initiate) on May 23, 2005 at 03:00 UTC
how would i return an open filehandle through a functon? aren't you supposed to send the contents of the file?	[reply]
Re^5: return undef by tlm (Prior) on May 23, 2005 at 03:04 UTC
Both are possible; it all depends what you want to do. Here's a function that returns an open read handle: `sub rh { my $filename = shift; open my $in, '<', $filename or die "Couldn't open $filename for reading: $!\n"; return $in; } my $in = rh( 'somefile.txt' ); print while <$in>;` [download] If your `myfunction` returns the contents of a file, then see ysth's reply. the lowliest monk	[reply] [d/l]