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ASP.NET MVC - Attaching an entity of type 'MODELNAME' failed because another entity of the same type
...the context.
// User -> Receipt validation
private bool canUserAccessA(int aID)
{
int userID = WebSecurity.GetUserId(User.Identity.Name);
int aFound = db.Model.AsNoTracking().Where(x => x.aID == aID && x.UserID==userID).Count();
return (aFound > 0); //if aFound > 0,...
Overriding superclass property with different type in Swift
... racingChassis = newRacingChassis
} else {
println("incorrect chassis type for racecar")
}
}
}
}
It seems one cannot declare a property with the let syntax and override it with var in it’s subclass or vice-versa, which may be because the supe...
#1071 - Specified key was too long; max key length is 1000 bytes
...and certainly no need to index the full length of 255 characters.
PS: The INT(1) and INT(32) data types indicates another misunderstanding about MySQL. The numeric argument has no effect related to storage or the range of values allowed for the column. INT is always 4 bytes, and it always allows ...
How many String objects will be created when using a plus sign?
...s at runtime. I'm just going by what IL is produced.
Finally, as regards interning, constants and literals are interned, but the value which is interned is the resulting constant value in the IL, not the literal. This means that you might get even fewer string objects than you expect, since multi...
Why is ArrayDeque better than LinkedList
... ArrayDeque is better than Java's LinkedList as they both implement Deque interface.
8 Answers
...
“Rate This App”-link in Google Play store app on the phone
...Uri.parse("market://details?id=$packageName")
val goToMarket = Intent(Intent.ACTION_VIEW, uri)
// To count with Play market backstack, After pressing back button,
// to taken back to our application, we need to add following flags to intent.
goToMark...
Is there an alternative to string.Replace that is case-insensitive?
...gComparison comparison)
{
StringBuilder sb = new StringBuilder();
int previousIndex = 0;
int index = str.IndexOf(oldValue, comparison);
while (index != -1)
{
sb.Append(str.Substring(previousIndex, index - previousIndex));
sb.Append(newValue);
index += old...
What are the barriers to understanding pointers and what can be done to overcome them? [closed]
Why are pointers such a leading factor of confusion for many new, and even old, college level students in C or C++? Are there any tools or thought processes that helped you understand how pointers work at the variable, function, and beyond level?
...
Why should I use the keyword “final” on a method parameter in Java?
...
Stop a Variable’s Reassignment
While these answers are intellectually interesting, I've not read the short simple answer:
Use the keyword final when you want the compiler to prevent a
variable from being re-assigned to a different object.
Whether the variable is a static ...
Why can't we have static method in a (non-static) inner class?
...
There's not much point to allowing a static method in a non-static inner class; how would you access it? You cannot access (at least initially) a non-static inner class instance without going through an outer class instance. There is no purel...