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The type 'string' must be a non-nullable type in order to use it as parameter T in the generic type
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Use string instead of string? in all places in your code.
The Nullable<T> type requires that T is a non-nullable value type, for example int or DateTime. Reference types like string can already be null. There would be no point in allowing things like ...
How to check visibility of software keyboard in Android?
...ve your activity's root view a known ID, say @+id/activityRoot, hook a GlobalLayoutListener into the ViewTreeObserver, and from there calculate the size diff between your activity's view root and the window size:
final View activityRootView = findViewById(R.id.activityRoot);
activityRootView.getVie...
Using bitwise OR 0 to floor a number
...ator casts the
number to an integer, thus removing the fractional part
All bitwise operations except unsigned right shift, >>>, work on signed 32-bit integers. So using bitwise operations will convert a float to an integer.
Does it have any advantages over doing Math.floor? Maybe it...
What is the difference between BIT and TINYINT in MySQL?
...h cases would you use which? Is there much of a difference? Which I typically used by persistence engines to store booleans?
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Linux bash: Multiple variable assignment
... writing the answer bash supporting this syntax was less common (as in installed by default), though I'm not 100% sure.
– Michael Krelin - hacker
Oct 21 '15 at 19:30
4
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Why is Lisp used for AI? [closed]
...rced most AI programmers to C++ for a few years. These days, prototypes usually are written in a younger dynamic language (Perl, Python, Ruby, etc) and implementations of successful research is usually in C or C++ (sometimes Java).
If you're curious about the 70's...well, I wasn't there. But I thin...
How to check for the type of a template parameter?
...::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 implementation */ }
template <> void foo<animal>() { /* specific for T ...
What is “Service Include” in a csproj file for?
...ts. This added seconds of delay to startup and solution open scenarios for all users, majority of whom don't use tests.
In Visual Studio 2013, we changed it so that Test Explorer package is loaded only when the solution contains one or more test projects. Test projects are identified in two differen...
Java regex capturing groups indexes
...ithout capturing property, hence named non-capturing group.
A group is usually used when you need to repeat a sequence of patterns, e.g. (\.\w+)+, or to specify where alternation should take effect, e.g. ^(0*1|1*0)$ (^, then 0*1 or 1*0, then $) versus ^0*1|1*0$ (^0*1 or 1*0$).
A capturing group, a...
ASP.NET MVC Html.DropDownList SelectedValue
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Thanks a lot mate, above all answers this worked for me, dont know why but it did
– Lamin Sanneh
Jan 5 '13 at 14:33
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