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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 ...
Changing specific text's color using NSMutableAttributedString in Swift
...and end index of the coloured-to-be characters in the string e.g.
var main_string = "Hello World"
var string_to_color = "World"
var range = (main_string as NSString).rangeOfString(string_to_color)
Then you convert to attributed string and use 'add attribute' with NSForegroundColorAttributeName:
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What is the main difference between Inheritance and Polymorphism?
...class, then you have a Student class that extends Person, Student inherits all the things that Person has. There are some details around the access modifiers you put on the fields/methods in Person, but that's the basic idea. For example, if you have a private field on Person, Student won't see it...
What's the difference between ContentControl and ContentPresenter?
...l (and vice-versa). At the moment, I'm using ContentControl pretty much all the time in my DataTemplate s. When would ContentPresenter be a better choice? and why?
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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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What's the best way to generate a UML diagram from Python source code? [closed]
... do you know how to visualize private methods starting with "_"
– gustavz
Jun 29 '18 at 9:40
2
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How to use Git properly with Xcode?
...s with multiple developers.
The truth is that it's way more harmful to disallow merging of that .pbxproj file than it is helpful. As you say, when you add a file unless other people get that file, they have to also add it to their project - in an application of any size, that sucks and it also tak...
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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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 ...
Difference between git checkout --track origin/branch and git checkout -b branch origin/branch
...purposes of disambiguation, even if the <branch> isn't unique across all remotes.
Set it to e.g. checkout.defaultRemote=origin to always checkout remote branches from there if <branch> is ambiguous but exists on the 'origin' remote.
Here, '-c' is the new '-b'.
First, some backgrou...