Check if a given value is out of certain range
Laura Creighton
lac at openend.se
Thu Oct 1 03:40:58 EDT 2015
In a message of Wed, 30 Sep 2015 14:46:48 -0600, Ian Kelly writes:
>Thought mirrors language. In English, we typically would say "x is not
>between 0 and 10", not "x is either less than 0 or greater than 10".
I wonder if that is regional.
I think you may have stacked things with the 'either' and the 'greater
than'. 'Either' doesn't get used much unless you are heading for
'either x or y but not both'. And everybody says 'more' even when
'greater than' is arguably more precise.
Around here, I would expect
"x is less than 0 or more than 10"
more often than either of your proposed forms.
But yesterday I hit up the students with the 'what do you find
more readable' question.
There was broad consensus that:
if 0 < x < 10 :
do_something()
else:
do_something_else()
was plenty more readable than anything using 'not'
so that the class favourite for readability was:
if 0 < x < 10:
pass
else:
complain_out_of_range()
though refactoring the whole lot so that you could have an
out_of_range Exception instead of an if had a large number of
supporters.
Laura
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