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What are the rules about using an underscore in a C++ identifier?
...the "_t" issue: n1256 (C99 TC3) says: "Typedef names beginning with int or uint and ending with _t" are reserved. I think that still allows using names like "foo_t" - but i think these are then reserved by POSIX.
– Johannes Schaub - litb
Sep 20 '09 at 1:39
...
Is “argv[0] = name-of-executable” an accepted standard or just a common convention?
...e_t getExecutablePathName(char* pathName, size_t pathNameCapacity)
{
uint32_t pathNameSize = 0;
_NSGetExecutablePath(NULL, &pathNameSize);
if (pathNameSize > pathNameCapacity)
pathNameSize = pathNameCapacity;
if (!_NSGetExecutablePath(pathName, &pathNameSize))
...
How do I find the length of an array?
...td container or a C-style array. For example:
#include <iterator>
uint32_t data[] = {10, 20, 30, 40};
auto dataSize = std::size(data);
// dataSize == 4
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...
(How) can I count the items in an enum?
...ed on normal enums (enum Foo { ... }), type-hinted enums (enum class Foo : uint8_t { ... }) with gcc 5.2.0 @ Linux and MinGW 4.9.3 @ Windows.
– rr-
Dec 2 '15 at 11:56
...
What is an idiomatic way of representing enums in Go?
... name() string
ordinal() int
values() *[]string
}
type GenderType uint
const (
MALE = iota
FEMALE
)
var genderTypeStrings = []string{
"MALE",
"FEMALE",
}
func (gt GenderType) name() string {
return genderTypeStrings[gt]
}
func (gt GenderType) ordinal() int {
retu...
In-Place Radix Sort
...e.
So for sequences of length 3, one could create 64 buckets, maybe sized uint32, or uint64.
Initialize them to zero.
Iterate through your very very large list of 3 char sequences, and encode them as above.
Use this as a subscript, and increment that bucket.
Repeat this until all of your sequences ...
What is the argument for printf that formats a long?
... have used a macro instead to capture the semantic meaning of the type (eg uint64_t).
char c; // 8 bits
short s; // 16 bits
int i; // 32 bits (on modern platforms)
long l; // 32 bits
long long ll; // 64 bits
Back in the day, "int" was 16 bits. You'd think it would now be...
How does Python manage int and long?
...183460469231731687303715884105728,170141183460469231731687303715884105727]
UInt8: [0,255]
UInt16: [0,65535]
UInt32: [0,4294967295]
UInt64: [0,18446744073709551615]
UInt128: [0,340282366920938463463374607431768211455]
If the size of your Int exceeds the limits mentioned above, python will automatic...
When is assembly faster than C?
... the high part of 64 bit integer multiplication: A portable version using uint64_t for 32x32 => 64-bit multiplies fails to optimize on a 64-bit CPU, so you need intrinsics or __int128 for efficient code on 64-bit systems.
_umul128 on Windows 32 bits: MSVC doesn't always do a good job when multip...
Types in Objective-C on iOS
...
Where is UINT_MAX?
– codehearted
May 10 '16 at 17:48
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