OK, looks like there is precedence in both directions:
http://en.wikipedia.org/wiki/Order_of_operations#Exceptions
On 7/06/2015 11:48 PM, Jochen Theodorou wrote:
"-8 - 1"
is in all languages I tests -9. That means Pyhton, Lua, Java, Ruby, QBasic,
Javascript, Go. And that in general independent of spacing.
bye blackdrag
Am 07.06.2015 13:50, schrieb Paul King:
What do lua/python/ruby return for "-8 - 1"?
On 7/06/2015 8:40 PM, Jochen Theodorou wrote:
Am 06.06.2015 13:08, schrieb Paul King:
[...]
def x = 5
assert -x ** 2 == -25 // treated as -(x ** 2)
assert --x ** 2 == 24 // treated as --(x ** 2)
This behavior is different to the other operators and different to what
the comments in the grammar describe as the intended behavior but the
order of two rules was presumably accidentally reversed in the grammar.
After the change, the following executes:
def x = 5
assert -x ** 2 == 25 // treated as (-x) ** 2
assert --x ** 2 == 16 // treated as (--x) ** 2
I just checked Ruby and Python and there -2**4 will return -16, same
for -2^4 in Lua. So now I am wondering if that is the right thing for
unary minus
bye blackdrag
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