It has little to do with rank of the type defined in 4.13. 4.13 defined internal rankings used to describe integral promotions and usual arithmetic conversions. They by itself do not directly affect overload resolution. Rankings relevant to overload resolution are defined in “13.3.3.1.1 Standard conversion sequences” and then used in “13.3.3.2 Ranking implicit conversion … Read more
Yes, it can. It is debatable whether it should–there is a longstanding bug report: http://code.djangoproject.com/ticket/7609
ISO C states what the differences are. The int data type is signed and has a minimum range of at least -32767 through 32767 inclusive. The actual values are given in limits.h as INT_MIN and INT_MAX respectively. An unsigned int has a minimal range of 0 through 65535 inclusive with the actual maximum value being … Read more
One possible aspect is that unsigned integers can lead to somewhat hard-to-spot problems in loops, because the underflow leads to large numbers. I cannot count (even with an unsigned integer!) how many times I made a variant of this bug for(size_t i = foo.size(); i >= 0; –i) … Note that, by definition, i >= … Read more
Your last approach seems promising. You can improve on that by manually considering the lowest bits of a and b: unsigned int average = (a / 2) + (b / 2) + (a & b & 1); This gives the correct results in case both a and b are odd.
Arguments for TIMESTAMP It implicitly stores data in UTC time zone. No matter what your session time-zone is. Useful if you need to use different time zones. You can have automated timestamping columns using DEFAULT CURRENT_TIMESTAMP or ON UPDATE CURRENT_TIMESTAMP (one column per table only until MySQL 5.6.5) You can use datetime function for date … Read more
Py_ssize_t is signed. See PEP 353, where it says “A new type Py_ssize_t is introduced, which has the same size as the compiler’s size_t type, but is signed. It will be a typedef for ssize_t where available.” You should use Py_ssize_t for indexing. I didn’t find a definitive statement of this in the Cython docs, … Read more
In the first two cases, you simply forgot to actually call the member function (!, it’s not a value) std::vector<int>::size like this: #include <vector> int main () { std::vector<int> v; auto size = v.size(); } Your third call int size = v.size(); triggers a warning, as not every return value of that function (usually a … Read more
int value can be -2147483648 these are 11 digits so the default display size is 11 unsigned int does not allow negative numbers so by default it need only display size 10 As the documentation below shows, the number of bits required to store SIGNED INT and UNSIGNED INT is the same, the range of … Read more
size_t is unsigned for historical reasons. On an architecture with 16 bit pointers, such as the “small” model DOS programming, it would be impractical to limit strings to 32 KB. For this reason, the C standard requires (via required ranges) ptrdiff_t, the signed counterpart to size_t and the result type of pointer difference, to be … Read more