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Difference between class and type
...constant), an interface, a primitive, or an array.
There are two distinct categories of types: primitive types and reference types:
A variable of primitive type always holds a primitive value of that same type. Such a value can only be changed by assignment operations on that variable.
A variable...
Is is possible to check if an object is already attached to a data context in Entity Framework?
...}
if (attach)
context.AttachTo(entitySetName, entity);
}
You can call it as follows:
User user = new User() { Id = 1 };
II.AttachToOrGet<Users>("Users", ref user);
This works very nicely because it's just like context.AttachTo(...) except you can use the ID trick I cited above...
typedef fixed length array
...e to define a 24-bit data type.I am using char[3] to represent the type. Can I typedef char[3] to type24 ? I tried it in a code sample. I put typedef char[3] type24; in my header file. The compiler did not complain about it. But when I defined a function void foo(type24 val) {} in my C file...
NHibernate ISession Flush: Where and when to use it, and why?
...
Briefly:
Always use transactions
Don't use Close(), instead wrap your calls on an ISession inside a using statement or manage the lifecycle of your ISession somewhere else.
From the documentation:
From time to time the ISession will execute the SQL statements needed to synchronize the ADO.NET...
How to provide different Android app icons for different gradle buildTypes?
...
Figured it out. What you need to do is create a separate src folder called debug that holds the different icons. For example, if your project layout is as follows, and your launcher icon is called ic_launcher.png:
[Project Root]
-[Module]
-src
-main
-res
-drawab...
How to return an array from JNI to Java?
...till have questions that should be part of your initial question. In this case, the JNI function in the example creates a number of arrays. The outer array is comprised of an 'Object' array creating with the JNI function NewObjectArray(). From the perspective of JNI, that's all a two dimensional ...
In git, what is the difference between merge --squash and rebase?
...
Both git merge --squash and git rebase --interactive can produce a "squashed" commit.
But they serve different purposes.
git merge --squash abranch
will produce a squashed commit on the destination branch, without marking any merge relationship.
(Note: it does not produce a...
Why do some functions have underscores “__” before and after the function name?
...pecial forms using leading or trailing underscores are
recognized (these can generally be combined with any case convention):
_single_leading_underscore: weak "internal use" indicator. E.g. from M import * does not import objects whose name starts with an underscore.
single_trailing_unde...
Does order of where clauses matter in SQL?
Let's say I have a table called PEOPLE having 3 columns ID, LastName, FirstName , none of these columns are indexed.
LastName is more unique, and FirstName is less unique.
...
Significance of a .inl file in C++
...
.inl files are never mandatory and have no special significance to the compiler. It's just a way of structuring your code that provides a hint to the humans that might read it.
I use .inl files in two cases:
For definitions of inline functions.
For definitions of function templa...