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What does the LayoutInflater attachToRoot parameter mean?
...on()
.add(parent, childFragment)
.commit();
Since you have already added the child fragment in onCreateView() by mistake. Calling add will tell you that child view is already added to parent Hence IllegalStateException.
Here you are not responsible for adding childView, FragmentManager...
How to check whether a pandas DataFrame is empty?
... on the previous examples, in which the index is 0 and empty is True. When reading the length of the columns index for the first loaded dataframe df1, it returns 0 columns to prove that it is indeed empty.
In [8]: len(df1.columns)
Out[8]: 0
In [9]: len(df2.columns)
Out[9]: 2
Critically, while the ...
Why is MATLAB so fast in matrix multiplication?
...o that accesses would be in contiguous memory addresses, your code would already run much faster because now the compiler can load entire rows in the cache at the same time. Just try this modified version:
timer.start();
float temp = 0;
//transpose matice2
for (int p = 0; p < rozmer; p++)
{
...
Why Choose Struct Over Class?
...mportant when passing around a variable to many classes and/or in a multithreaded environment. If you can always send a copy of your variable to other places, you never have to worry about that other place changing the value of your variable underneath you.
With Structs, there is much less need to ...
Private virtual method in C++
...ior from violating that trust (e.g. labeled 'clueless' by not bothering to read your documentation) have only themselves to blame.
Update: I've had some feedback that claims you can "chain" virtual function implementations this way using private virtual functions. If so, I'd sure like to see it.
T...
Storing Data in MySQL as JSON
...red as strings, instead using an internal binary format that permits quick read access to document elements. JSON documents stored in JSON columns are automatically validated whenever they are inserted or updated, with an invalid document producing an error. JSON documents are normalized on creation...
How to declare a structure in a header that is to be used by multiple files in c?
...ame names), and none has drawbacks I know of, so using the same name makes reading simpler if you don't use C separate "namespaces" for structs and other symbols.
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Why does casting int to invalid enum value NOT throw exception?
...s are often used as flags:
[Flags]
enum Permission
{
None = 0x00,
Read = 0x01,
Write = 0x02,
}
...
Permission p = Permission.Read | Permission.Write;
The value of p is the integer 3, which is not a value of the enum, but clearly is a valid value.
I personally would rather have seen ...
Why are only a few video games written in Java? [closed]
...d of course, the license needs to allow it).
Also, a lot of legacy code already exists in C++. If code from previous projects can be reused (say, if you're writing a sequel), that counts even more in favor of sticking with the same language, instead of rewriting it in a new language (more so since ...
What are the differences between Deferred, Promise and Future in JavaScript?
...larity and loosen coupling through a standardized interface. See suggested reading from @jfriend00:
Rather than directly passing callbacks to functions, something which
can lead to tightly coupled interfaces, using promises allows one to
separate concerns for code that is synchronous or asyn...