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String isNullOrEmpty in Java? [duplicate]
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I was confused between the distinction between blank and empty, so I looked it up; blank means, "", null, and any amount of whitespace; empty is just "" and null.
– James McMahon
Feb 16 '10 at 15:50
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'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”
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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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What is the difference between user and kernel modes in operating systems?
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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.
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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...
Angularjs - ng-cloak/ng-show elements blink
...ink it makes the code less readable. For them, I don't see a reason not to mix the two approaches.
– Dave Everitt
Nov 3 '13 at 8:34
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Calling async method synchronously
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@RaraituL, in general, you don't mix async and sync code, pick euther model. You can implement both SaveChangesAsync and SaveChanges, just make sure they don't get called both in the same ASP.NET project.
– noseratio
Ma...
How do I clear the terminal screen in Haskell?
How can I clear a terminal screen after my user has selected an option from my application's menu?
8 Answers
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Locking a file in Python
... you will never get a file with contents from multiple competing processes mixed together.
– Thomas Lux
Jan 15 '19 at 19:27
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