Re^2: Or, Or, Equals Zero, $x ||= 0 ('')

Works for strings too: $x ||= '': will avoid warnings about using an undefined value in a print, string concatenation, string comparison, regular expression, and so on.

That also turns '0' into '' and so would probably be better written as:

$x= ''  if ! defined $x;
[download]

Or you can use //= if you are on the bleading edge and eschew backward compatability. Note that ||= is probably the best choice for the numeric case as treating '' as a number can also cause a warning.

- tye

Comment on Re^2: Or, Or, Equals Zero, $x \|\|= 0 ('') Select or Download Code

Replies are listed 'Best First'.
Re^3: Or, Or, Equals Zero, $x \|\|= 0 ('') by Erez (Priest) on Nov 29, 2007 at 11:01 UTC
If it's on a new code, and no animals are harmed, I don't see a problem with using 5.10 syntax. It's a question of what the people around you like to read. For instance, I'd write it `$x= '' unless defined $x;` [download] But its a question of whatever suits. `Software speaks in tongues of man; I debug, therefore I code.`	[reply] [d/l] [select]