(test) ? a:b
torriem at gmail.com
Wed Oct 22 19:16:48 CEST 2014
On 10/22/2014 05:45 AM, Mark Lawrence wrote:
>>> without not:
>>> j = [j+1, 3][j>=10]
>>> with not:
>>> j = [3, j+1][not (j>=10)]
>> Oh it's a trick !
> IMHO it's just dreadful. Why people insist on messing around like this
> I really don't know, it just drives me nuts.
This actually was the standard idiom used by many python programs before
Python 2.5. But I agree. Don't do this anymore! Python has a ternary
if expression. Also the ternary if expression does, I believe
short-circuit logic, so the non-chosen path is not calculated. This
hack does not. Could lead to interesting bugs depending on your assumptions.
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