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What are some uses of template template parameters?
...ALUE> class interface {
void do_something(VALUE v) {
static_cast<DERIVED*>(this)->do_something(v);
}
};
template <typename VALUE> class derived : public interface<derived, VALUE> {
void do_something(VALUE v) { ... }
};
typedef interface<derived<int...
Creating a new user and password with Ansible
... - user: name=tset password={{password}}
If your playbook or ansible command line has your password as-is in plain text, this means your password hash recorded in your shadow file is wrong. That means when you try to authenticate with your password its hash will never match.
Additionally, see Ans...
Is there a simple way to convert C++ enum to string?
...(temp.str()); \
os << enumName << "::" << strings[static_cast<int>(value)]; \
return os;}
To use this in your code, simply do:
AWESOME_MAKE_ENUM(Animal,
DOG,
CAT,
HORSE
);
share
...
SHA512 vs. Blowfish and Bcrypt [closed]
...2 (in the context of an appropriate algorithm like PBKDF2) is good enough. And the answer is yes, either algorithm is secure enough that a breach will occur through an implementation flaw, not cryptanalysis.
If you insist on knowing which is "better", SHA-512 has had in-depth reviews by NIST and ot...
printf format specifiers for uint32_t and size_t
...eded is that the format specifiers and the types agree, and you can always cast to make that true. long is at least 32bits, so %lu together with (unsigned long)k is always correct. size_t is trickier, which is why %zu was added in C99. If you can't use that, then treat it just like k (long is the bi...
Generate random 5 characters string
I want to create exact 5 random characters string with least possibility of getting duplicated. What would be the best way to do it? Thanks.
...
Can I use a function for a default value in MySql?
... Note that as per the already linked docs in answer: ... stored functions, and user-defined functions are not permitted. I.e., the only functions that can be used as default expressions are built-in functions.
– asherbar
Mar 29 at 21:19
...
How to create a GUID/UUID using iOS
...
To make this ARC compliant you must cast the string object and remove the autorelease call. In other words add the cast: NSString* string = (__bridge_transfer NSString*)CFUUIDCreateString(NULL, theUUID);
– Paul de Lange
Ma...
boost多索引容器multi_index_container实战 - C/C++ - 清泛网 - 专注C/C++及内核技术
...修改iterator指向的元素，看如下代码：
Student& stu = const_cast<Student&>(*it);
stu.stu_couselist.insert( Course::courses[Course::CourseNum_Maths] );
通过const_cast去掉了it的const性质，可以直接修改it了，但是如果你这样做了，你就必须为你接下来的...
Detect if device is iOS
...
@astronought double negation is used to cast to a boolean
– Vitim.us
Jun 14 '19 at 20:18
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