membership test problem

[Frank Ch. Eigler]

Mike Mason <mmlnx@us.ibm.com> writes:

> What should the following code print?  I expected TRUE, but got
> FALSE.  Looks like if the array element value is 0, the membership
> test fails.  Is this correct? [...]

Yes, Josh's explanation is correct, zero and "" are deemed to be
null/absent values for purposes of array elements.  (This could change
though.)

(I could have sworn that I documented this behavior in the man page,
but now I can't find it.  It is in the tutorial.)

- FChE