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What are dictionary view objects?
...
>>> del dishes['eggs']
>>> keys # No eggs anymore!
dict_keys(['sausage', 'bacon', 'spam'])
>>> values # No eggs value (2) anymore!
dict_values([1, 1, 500])
(The Python 2 equivalent uses dishes.viewkeys() and dishes.viewvalues().)
This example shows the dynamic char...
How to implement the factory method pattern in C++ correctly
...ude <memory>
class FactoryReleaseOwnership{
public:
std::unique_ptr<Foo> createFooInSomeWay(){
return std::unique_ptr<Foo>(new Foo(some, args));
}
};
// Factory retains object ownership
// Thus returning a reference.
#include <boost/ptr_container/ptr_vector.hpp&...
How to determine whether a given Linux is 32 bit or 64 bit?
...
Try uname -m. Which is short of uname --machine and it outputs:
x86_64 ==> 64-bit kernel
i686 ==> 32-bit kernel
Otherwise, not for the Linux kernel, but for the CPU, you type:
cat /proc/cpuinfo
or:
grep flags /proc/cpuinfo
Under "flags" parameter, you will see various value...
How to call C from Swift?
... frame = CGRect(x: 10, y: 10, width: 100, height: 100)
import Darwin
for _ in 1..10 {
println(rand() % 100)
}
See Interacting with Objective-C APIs in the docs.
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...
How to convert An NSInteger to an int?
...endently of whether you are building for a 32-bit or a 64-bit system.
#if __LP64__ || TARGET_OS_EMBEDDED || TARGET_OS_IPHONE || TARGET_OS_WIN32 || NS_BUILD_32_LIKE_64
typedef long NSInteger;
#else
typedef int NSInteger;
#endif
You can use NSInteger any place you use an int without converting it....
Navigation bar appear over the views with new iOS7 SDK
... with this if: if (NSFoundationVersionNumber > NSFoundationVersionNumber_iOS_6_1)
– Aviel Gross
Oct 14 '13 at 8:40
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How can I wait for a thread to finish with .NET?
...efully these compile, I haven't tried)
public class Form1 : Form
{
int _count;
void ButtonClick(object sender, EventArgs e)
{
ThreadWorker worker = new ThreadWorker();
worker.ThreadDone += HandleThreadDone;
Thread thread1 = new Thread(worker.Run);
thread...
How to test code dependent on environment variables using JUnit?
...erviceImpl {
public void doSomeFooStuff() {
System.getenv("FOO_VAR_1");
System.getenv("FOO_VAR_2");
System.getenv("FOO_VAR_3");
// Do the other Foo stuff
}
}
You could do the following:
package com.foo.service.impl;
import static org.mockito.Mockito.when...
What does the Q_OBJECT macro do? Why do all Qt objects need this macro?
...ing Qt and noticed that all the example class definitions have the macro Q_OBJECT as the first line. What is the purpose of this preprocessor macro?
...
What is an undefined reference/unresolved external symbol error and how do I fix it?
...Preprocessing directives are executed, macro invocations are expanded, and _Pragma unary operator expressions are executed. [SNIP]
Each source character set member in a character literal or a string literal, as well as each escape sequence and universal-character-name
in a character literal or a non...