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When should I use nil and NULL in Objective-C?
... technically, they are exactly equal, you can send messages to both nil and to NULL. Idiomatically though nil is usually used to represent an object
– cobbal
Oct 14 '09 at 5:43
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EditText underline below text property
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Also works on Xamarin for Android, in your custom renderer OnElementChanged you can do Control.Background.SetColorFilter(Android.Graphics.Color.White, PorterDuff.Mode.SrcIn);
– David Conlisk
Feb 16 '16 at 12:33
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Determining the current foreground application from a background task or service
...es() method as this returns all sorts of system rubbish from my experience and you'll get multiple results which have RunningAppProcessInfo.IMPORTANCE_FOREGROUND. Use getRunningTasks() instead
This is the code I use in my service to identify the current foreground application, its really easy:
Ac...
How do you use window.postMessage across domains?
... },
false);
</script>
</body>
</html>
A and B must be something like http://domain.com
EDIT:
From another question, it looks the domains(A and B here) must have a / for the postMessage to work properly.
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How do I set up a simple delegate to communicate between two view controllers?
I have two UITableViewControllers and need to pass the value from the child view controller to the parent using a delegate. I know what delegates are and just wanted to see a simple to follow example.
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How to copy DLL files into the same folder as the executable using CMake?
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I'd use add_custom_command to achieve this along with cmake -E copy_if_different.... For full info run
cmake --help-command add_custom_command
cmake -E
So in your case, if you have the following directory structure:
/CMakeLists.txt
/src
/lib...
What's the best way to trim std::string?
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EDIT Since c++17, some parts of the standard library were removed. Fortunately, starting with c++11, we have lambdas which are a superior solution.
#include <algorithm>
#include <cctype>
#include <locale>
// trim from start (in place)
static i...
Paperclip::Errors::MissingRequiredValidatorError with Rails 4
...ays "MissingRequiredValidatorError"
I thought that by updating post_params and giving it :image it would be fine, as both create and update use post_params
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How to implement history.back() in angular.js
I have directive which is site header with back button and I want on click to go back to the previous page. How do I do it in the angular way?
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How to see which flags -march=native will activate?
...get doesn't display CPU cache information, of which the methods both elias and 42n4 below have listed. Specifically, on gcc 4.9.2 on a Phenom, the output includes these: --param l1-cache-size=64 --param l1-cache-line-size=64 --param l2-cache-size=512
– Daniel Santos
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