On 2013-Oct-15 (Tue) at 05:38 (+0000), Thomas Jericke wrote:
There are less theoretical situations where the current
implementation is unintuitive. Mostly the 'or' and 'and' operators.
They do not only accept non boolean values, they also return
non-boolean values. typeof(A or B) could be anything, and 'A' and
'B' don't even have to change their types for "A or B" to change
its type.
typeof(true or 10) -- boolean
typeof(false or 10) -- number
Thomas,
I suggest that 'and' and 'or' in Lua may feel unintuitive only if
you expect them to just be the traditional boolean operators.
But they are much more general than that, while of course including
the standard behaviour as a particular case.
This generality may feel weird at first, but once it becomes familiar
it can be very convenient indeed.
Joseph
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Joseph Manning / Computer Science / UCC Cork Ireland / manning@cs.ucc.ie
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