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Testing modules in rspec
... module expects some behaviours to be present in the class into which it's mixed, then I'd try to implement dummies of those behaviours. Just enough to make the module happy to perform its duties.
That said, I'd be a little nervous about my design when a module expects a whole lot from its host (do...
EditorFor() and html properties
...
I think you are mixing up contexts. How can you have two different EditorFor calls with each one getting its own size and maxlength values with the link you provided? If you don't want to use EditorFor, you always can use TextBox helper or...
How to check if a file exists in a folder?
... Noe that this answer returns false if the user does not have permission to read the file. So it does more than just checkinf if the file exists in a folder. You might want to use DirectoryInfo.GetFiles() and enumerate the result.
– ogborstad
Feb 10 '15 a...
Do Java arrays have a maximum size?
...nt (build 1.8.0_141-b16)
OpenJDK 64-Bit Server VM (build 25.141-b16, mixed mode)
It only works for x >= 2 which means the maximum size of an array is Integer.MAX_VALUE-2
Values above that give
Exception in thread "main" java.lang.OutOfMemoryError: Requested array size exceeds VM limi...
'AND' vs '&&' as operator
... ("*") operator has a higher precedence than the addition ("+") operator.
Mixing them together in single operation, could give you unexpected results in some cases
I recommend always using &&, but that's your choice.
On the other hand "&" is a bitwise AND operation. It's used for the...
Change type of varchar field to integer: “cannot be cast automatically to type integer”
...
If you've accidentally or not mixed integers with text data you should at first execute below update command (if not above alter table will fail):
UPDATE the_table SET col_name = replace(col_name, 'some_string', '');
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Are Java static initializers thread safe?
...it runs once per class loader. First comment is confusing because phrasing mixes these two answers.
– J.M.I. MADISON
Jul 10 '18 at 20:09
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Separating class code into a header and cpp file
... gx = x;
gy = y;
}
int A2DD::getSum()
{
return gx + gy;
}
You could mix the two (leave getSum() definition in the header for instance). This is useful since it gives the compiler a better chance at inlining for example. But it also means that changing the implementation (if left in the header...
What is the difference between user and kernel modes in operating systems?
...cted
access to the underlying hardware. It
can execute any CPU instruction and
reference any memory address. Kernel
mode is generally reserved for the
lowest-level, most trusted functions
of the operating system. Crashes in
kernel mode are catastrophic; they
will halt the entire PC.
...
Xcode 4 and Core Data: How to enable SQL Debugging
I'm working on a universal iOS app and I'd like to see the raw SQL in the logs when I'm debugging. There is some info in this blog post about how to enable raw SQL logging for iOS Core Data development. The given example is for Xcode 3 and it's just not clear to me how to enable this in Xcode 4.
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