Re^2: problem using seek on some systems

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Re^3: problem using seek on some systems by ikegami (Patriarch) on Dec 06, 2006 at 22:59 UTC
Lexical variables have a tighter scope than package variables. There are numerous advantages to limiting the scope of a variable. Predominantly, your handle will be closed if even if you don't execute the block to its end. Reasons not to use a lexical variable for a file handle: Supporting Perl versions older than 5.6.0. The 3-arg `open` can open files 2-arg `open` can't open. The 3-arg `open` is not subject to the injection bugs and attacks to which 2-arg `open` is vulnerable. Reasons not to 3-arg `open`. Wanting to open STDIN/STDOUT using '-'. Wanting to work file descriptors. Wanting to open a pipe.	[reply] [d/l] [select]

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Re^3: problem using seek on some systems
by ikegami (Patriarch) on Dec 06, 2006 at 22:59 UTC

Lexical variables have a tighter scope than package variables. There are numerous advantages to limiting the scope of a variable. Predominantly, your handle will be closed if even if you don't execute the block to its end.

Reasons not to use a lexical variable for a file handle: Supporting Perl versions older than 5.6.0.

The 3-arg open can open files 2-arg open can't open. The 3-arg open is not subject to the injection bugs and attacks to which 2-arg open is vulnerable.

Reasons not to 3-arg open. Wanting to open STDIN/STDOUT using '-'. Wanting to work file descriptors. Wanting to open a pipe.

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