anything new on the ternary operator?
Ben Finney
bignose-hates-spam at and-zip-does-too.com.au
Sun Jul 6 22:35:00 EDT 2003
On Mon, 07 Jul 2003 02:13:15 GMT, Russell Reagan wrote:
> What is superior about using the proposed ternary operator instead of
> using the 'and' and 'or' operators to simulate inline logic?
The "cond and expr1 or expr2" does not always function as expected for a
ternary if-then-else operator. The PEP for the ternary operator
explains:
"A common way to emulate an if-then-else expression is:
<condition> and <expression1> or <expression2>
However, this doesn't work the same way: it returns <expression2>
when <expression1> is false! See FAQ 4.16 for alternatives that
work -- however, they are pretty ugly and require much more effort
to understand."
<http://www.python.org/peps/pep-0308.html>
FAQ 4.16 is here:
<http://www.python.org/cgi-bin/faqw.py?req=show&file=faq04.016.htp>
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