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Entity Framework code first unique column
...odel will look like this now in EF CF 6.1+:
public class User
{
public int UserId{get;set;}
[StringLength(450)]
[Index(IsUnique=true)]
public string UserName{get;set;}
}
Update:
if you use Fluent:
public class UserMap : EntityTypeConfiguration<User>
{
public UserMap()
...
onCreateOptionsMenu inside Fragments
...
Interesting note: if you also override onCreateOptionsMenu in your containing Activity, both options menu items will be displayed.
– Adam Johns
Mar 4 '15 at 4:51
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Parse string to date with moment.js
...'s string is in a standard Date format. Stephen Paul's answer shows how to convert any string, given a specific format, to a date that can be manipulated.
– Agamemnus
Mar 23 '19 at 21:05
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How to cast an object in Objective-C
...tive-C works like Java, just remember to add asterisks to variables that point to Obj-C objects."
– Dan Rosenstark
Jun 14 '10 at 3:43
2
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How to clone ArrayList and also clone its contents?
... obviously, you will have to get your Dog class to implement the Cloneable interface and override the clone() method.
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Measuring text width to be drawn on Canvas ( Android )
... drawn on an Android canvas using the drawText() method according to the Paint used to draw it?
7 Answers
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Volatile vs Static in Java
...stitute for proper synchronisation!
For instance:
private static volatile int counter = 0;
private void concurrentMethodWrong() {
counter = counter + 5;
//do something
counter = counter - 5;
}
Executing concurrentMethodWrong concurrently many times may lead to a final value of counter diff...
why does DateTime.ToString(“dd/MM/yyyy”) give me dd-MM-yyyy?
I want my datetime to be converted to a string that is in format "dd/MM/yyyy"
5 Answers
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Swift native base class or NSObject
...error in testIncorrect_CompilerShouldSpot,
reporting "... 'MyClass' is not convertible to 'MirrorDisposition'"
class MyClass {
let mString = "Test"
func getAsString() -> String {
return mString
}
func testIncorrect_CompilerShouldSpot() {
var myString = "Compare to me"
var...
Using the “final” modifier whenever applicable in Java [closed]
...sibilities that you (or the next programmer, working on your code) will misinterpret or misuse the thought process which resulted in your code. At least it should ring some bells when they now want to change your previously immutable thing.
At first, it kind of looks awkward to see a lot of final k...