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Difference between viewDidLoad and viewDidAppear
...ut while viewDidLoad is generally only called once and only once, there is one situation where it may be called again. Specifically, if you ever receive a didReceiveMemoryWarning, your non-visible views may be released (though the view controllers are untouched) and when you return back, viewDidLoad...
Real escape string and PDO [duplicate]
... process of migrating old code to use PDO and while the solution is a good one, people need to be aware of the fact that it will place quotes around the string. So if people are building out queries that already have quotes like "SELECT * FROM users WHERE username = '".$conn->quote($username)."'...
Why are #ifndef and #define used in C++ header files?
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@CIsForCookies Punch "one definition rule" into your favorite search engine.
– David Schwartz
Jul 25 '19 at 1:57
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How to create custom exceptions in Java? [closed]
...ar as throwing/catching custom exceptions, it works just like the built-in ones - throw via
throw new MyCustomException()
and catch via
catch (MyCustomException e) { }
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How to choose the right bean scope?
...on wide data/constants, such as dropdown lists which are the same for everyone, or managed beans without any instance variables and having only methods.
Abusing an @ApplicationScoped bean for session/view/request scoped data would make it to be shared among all users, so anyone else can see each oth...
C# generic type constraint for everything nullable
... if (type.IsClass)
return;
throw new InvalidOperationException("Type is not nullable or reference type.");
}
public bool IsNull()
{
return item == null;
}
}
Then the following code compiles, but the last one (foo3) throws an exception in the constru...
Select all text inside EditText when it gets focus
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@machtnix Add focus to another component: stackoverflow.com/a/1662088/1020871
– Love
Oct 15 '16 at 17:21
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Variable's scope in a switch case [duplicate]
... not to mention dead code or cyclomatic complexity. So as a general advice one should avoid such constructs at least in cases that ain't trivial
– worenga
Apr 8 '15 at 22:55
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MySQL table is marked as crashed and last (automatic?) repair failed
...suddenly server hanged and when I returned back all tables are ok but this one showing 'in use' and when I try to repair it doesn't proceed.
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JSON.stringify output to div in pretty print way
... to avoid long lines to go out of the container the pre tag is a child of, one should add the following css rules to the pre tag: stackoverflow.com/a/248013/883083
– IHeartAndroid
Aug 3 '15 at 14:11
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