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Can I use Objective-C blocks as properties?
...sure they are declared as @property(copy). For example:
typedef void(^TestBlock)(void);
@interface SecondViewController : UIViewController
@property (nonatomic, copy) TestBlock block;
@end
In MRC, blocks capturing context variables are allocated in stack; they will be released when the stack...
Check if user is using IE
...
/Edge\/|Trident\/|MSIE /.test(window.navigator.userAgent) I know this works on 10 and 11. If you can verify <IE9 and Edge, edit answer.
– Indolering
May 5 '15 at 23:59
...
Spring Boot - inject map from application.yml
...ringApplication.run(MapBindingSample.class, args)
.getBean(Test.class).getInfo());
}
@Bean
@ConfigurationProperties
public Test test() {
return new Test();
}
public static class Test {
private Map<String, Object> info = new HashMap<...
Copy file remotely with PowerShell
....
It's much easier this way.
Copy-Item -Path \\serverb\c$\programs\temp\test.txt -Destination \\servera\c$\programs\temp\test.txt;
By using UNC paths instead of local filesystem paths, you help to
ensure that your script is executable from any client system with
access to those UNC path...
PostgreSQL: Difference between text and varchar (character varying)
...er varchar – because it has distinct name
The article does detailed testing to show that the performance of inserts and selects for all 4 data types are similar. It also takes a detailed look at alternate ways on constraining the length when needed. Function based constraints or domains provi...
Conventions for exceptions or error codes
...on what you measure and how you measure. It's pretty easy to come up with tests that show exception-based APIs can be far faster.
– Mooing Duck
Jan 30 '14 at 0:04
1
...
What's the difference between getRequestURI and getPathInfo methods in HttpServletRequest?
... comparison table here (just to have it somewhere):
Servlet is mapped as /test%3F/* and the application is deployed under /app.
http://30thh.loc:8480/app/test%3F/a%3F+b;jsessionid=S%3F+ID?p+1=c+d&p+2=e+f#a
Method URL-Decoded Result
-------------------------------------...
Bash/sh - difference between && and ;
...because a long time ago at the nearby computer:
root# pwd
/
root# cd /tnp/test; rm -rf *
cd: /tnp/test: No such file or directory
...
... and after a while ...
...
^C
but not helped... ;)
cd /tnp/test && rm -rf * is safe... ;)
...
@selector() in Swift?
...y in Swift. (For example, use optional chaining on protocol types or is/as tests instead of respondsToSelector:, and use closures wherever you can instead of performSelector: for better type/memory safety.)
But there are still a number of important ObjC-based APIs that use selectors, including timer...
How can I pass a member function where a free function is expected?
... char * argv[])
{
...
aClass a;
auto fp = std::bind(&aClass::test, a, _1, _2);
function1(fp);
return 0;
}
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