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How to use clock() in C++
...
#include <iostream>
#include <cstdio>
#include <ctime>
int main() {
std::clock_t start;
double duration;
start = std::clock();
/* Your algorithm here */
duration = ( std::clock() - start ) / (double) CLOCKS_PER_SEC;
std::cout<<"printf: "<< ...
What's the difference between __PRETTY_FUNCTION__, __FUNCTION__, __func__?
...ng this wanted to see.
For GCC:
$ cat test.cpp
#include <iostream>
int main(int argc, char **argv)
{
std::cout << __func__ << std::endl
<< __FUNCTION__ << std::endl
<< __PRETTY_FUNCTION__ << std::endl;
}
$ g++ test.cpp
$ ./...
What's the point of g++ -Wreorder?
...
Consider:
struct A {
int i;
int j;
A() : j(0), i(j) { }
};
Now i is initialized to some unknown value, not zero.
Alternatively, the initialization of i may have some side effects for which the order is important. E.g.
A(int n) : j(n++...
Undefined behavior and sequence points
What are "sequence points"?
5 Answers
5
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Interfacing with structs and anonymous unions with c2hs
...*/
__extension__ union {
struct me_grid {
unsigned int x;
unsigned int y;
} grid;
struct me_encoder {
unsigned int number;
int delta;
} encoder;
struct me_tilt {
unsigned int sensor;
...
When would you use a List instead of a Dictionary?
...
When you don't need fast lookups on key - maintaining the hashtable used by Dictionary has a certain overhead.
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How do I determine whether an array contains a particular value in Java?
...rrays.stream(values).anyMatch("s"::equals);
To check whether an array of int, double or long contains a value use IntStream, DoubleStream or LongStream respectively.
Example
int[] a = {1,2,3,4};
boolean contains = IntStream.of(a).anyMatch(x -> x == 4);
...
Create an enum with string values
...at way it will return the string value whenever accessed and not just when converting toString().
– John
Feb 28 '14 at 23:37
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What is the difference between class and instance methods?
... used with just the class name. In Objective-C they are defined thusly:
@interface MyClass : NSObject
+ (void)aClassMethod;
- (void)anInstanceMethod;
@end
They could then be used like so:
[MyClass aClassMethod];
MyClass *object = [[MyClass alloc] init];
[object anInstanceMethod];
Some real...
Omitting all xsi and xsd namespaces when serializing an object in .NET?
... I would just like to add that removing the default namespace can have unintended consequences : for instance, if you use the XmlInclude attribute to serialize derived types, the namespaces will be added to each of these elements, whether you want it or not, because they're necessary for deseriali...