I learned that asserts are supposed to be used to
guarantee that the programmer did not make a mistake in
his coding, and pass in bad values to a subroutine.

In the case of the credit card, it would be pointless to assert() that the card is active.
It would be prudent, however, to assert() that the program passed in a valid card to
the subroutine that checks for active cards. Whether or not the card is active is not
a programming error. Not passing a valid card in certainly is.

In reply to Re^3: C/C++ type assert() in Perl? by jdavidboyd
in thread C/C++ type assert() in Perl? by davidj

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