
There's more than one way to do things
	PerlMonks

by ambrus (Abbot)

on Jun 08, 2005 at 07:28 UTC ( [id://464637]=note: print w/replies, xml )

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No, it's really the string "0 but true". Try this for example:

use File::Temp; $th = File::Temp::tempfile(undef, "UNLINK", 1); $zbt =
+ sysseek $th, 0, 0; print $zbt, "\n";
[download]

The "E0" suffix appears with the flip-flop operators, but "0E0" can never appear, only "1E0", "2E0" etc.

Comment on Re^2: The best "true zero" is... Select or Download Code

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Re^3: The best "true zero" is... by mce (Curate) on Jun 09, 2005 at 05:08 UTC
true, but also not true :-) Many functions -like the execute function in DBI- return 0E0 when they want to return a result that is ment to be zero but is 'boolean' true in tests So, indeed it is not general perl, but it is common to use 0E0 as "zero but true". Cheers, --------------------------- Dr. Mark Ceulemans Senior Consultant BMC, Belgium	[reply]
Re^4: The best "true zero" is... by ambrus (Abbot) on Jun 09, 2005 at 05:13 UTC
That's right, but the core perl uses only "0 but true", so "0E0" is not Larry's.	[reply]

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