Re: shift doesnt shift

by mje (Curate)

on Nov 27, 2008 at 13:43 UTC ( #726407=note: print w/replies, xml )

Need Help??

works for me so long as the argument is true i.e.,

./service.pl file.txt

works but of course the following do not:

./service.pl ''
./service.pl 0
[download]

for the obvious reason that the empty string and 0 are not true.

Comment on Re: shift doesnt shift Select or Download Code

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Re^2: shift doesnt shift by joec_ (Scribe) on Nov 27, 2008 at 13:51 UTC
$@ is empty. Im just using the name of the command line arg to read in a file of data. Replacing \|\| with or didnt work. Like i said, the same code works in a different script. What else could cause a shift to die? TIA. Joe.	[reply]
Re^3: shift doesnt shift by Corion (Patriarch) on Nov 27, 2008 at 13:56 UTC
We need to see more code.	[reply]
Re^3: shift doesnt shift by SuicideJunkie (Vicar) on Nov 27, 2008 at 14:03 UTC
You wrote: `X or Y` 1) Y is evaluated when X is false 2) X is empty (aka undef, aka false) 1+2=3) Therefore Y (the die) is performed. So, what is the problem here? It is doing exactly what you told it to. If you want it to die on some other condition than the shift giving 0/undef/''/etc, then you need to specify that condition in your code. Try specifying what to shift: `$var = shift @array` to ensure you're shifting the right array.	[reply] [d/l] [select]

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