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Detect Retina Display
Does iOS SDK provides an easy way to check if the currentDevice has an high-resolution display (retina) ?
14 Answers
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Modulo operation with negative numbers
...mple A. 5/(-3) is -1
=> (-1) * (-3) + 5%(-3) = 5
This can only happen if 5%(-3) is 2.
Example B. (-5)/3 is -1
=> (-1) * 3 + (-5)%3 = -5
This can only happen if (-5)%3 is -2
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impr...
UIButton: Making the hit area larger than the default hit area
...value = objc_getAssociatedObject(self, &KEY_HIT_TEST_EDGE_INSETS);
if(value) {
UIEdgeInsets edgeInsets; [value getValue:&edgeInsets]; return edgeInsets;
}else {
return UIEdgeInsetsZero;
}
}
- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event {
if(UI...
How do I get the type name of a generic type argument?
If I have a method signature like
3 Answers
3
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How to check for the type of a template parameter?
...#include <type_traits>
template <typename T>
void foo()
{
if (std::is_same<T, animal>::value) { /* ... */ } // optimizable...
}
Usually, that's a totally unworkable design, though, and you really want to specialize:
template <typename T> void foo() { /* generic imple...
How to split (chunk) a Ruby array into parts of X elements? [duplicate]
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If array size doesn't divide evenly into the number of chunks, is there a way to merge the remainder chunk with the previous one? So in your example, ["10"] would be merged with ["7", "8", "9"] to make the last chunk ["7", "8...
What ports does RabbitMQ use?
...itmq.com/configure.html#define-environment-variables
The number might be differently if changed by someone in the rabbitmq configuration file:
vi /etc/rabbitmq/rabbitmq-env.conf
Ask the computer to tell you:
sudo nmap -p 1-65535 localhost
Starting Nmap 5.51 ( http://nmap.org ) at 2014-09-19 13...
Why are Python lambdas useful? [closed]
...ambdas. Is lambda one of those "interesting" language items that in real life should be forgotten?
26 Answers
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How do I get the path of a process in Unix / Linux
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sudo if output is empty, some processes are created by other system users.
– Lun4i
Sep 2 '17 at 5:21
add ...
Is HttpClient safe to use concurrently?
...can find of usages of HttpClient , it is used for one off calls. But what if I have a persistent client situation, where several requests can be made concurrently? Basically, is it safe to call client.PostAsync on 2 threads at once against the same instance of HttpClient .
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