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java: Class.isInstance vs Class.isAssignableFrom
...ableFrom(obj.getClass()) == clazz.isInstance(obj) will throw a NullPointerEm>x m>ception and not return true.
– Andrew Macheret
Apr 23 '18 at 22:14
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What is the difference between a var and val definition in Scala?
...a var can. However, said object can have its internal state modified. For em>x m>ample:
class A(n: Int) {
var value = n
}
class B(n: Int) {
val value = new A(n)
}
object Test {
def main(args: Array[String]) {
val m>x m> = new B(5)
m>x m> = new B(6) // Doesn't work, because I can't replace the obje...
What does T&& (double ampersand) mean in C++11?
...velopers.
CAUTION: the linked article on MSDN ("Rvalue References: C++0m>x m> Features in VC10, Part 2") is a very clear introduction to Rvalue references, but makes statements about Rvalue references that were once true in the draft C++11 standard, but are not true for the final one! Specifically, i...
EF Code First: How do I see 'EntityValidationErrors' property from the nuget package console?
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I got annoyed by this recently too. I fim>x m>ed it by putting a wrapper function in the Configuration class in the Seed method, and replaced calls to SaveChanges with calls to my function instead. This function would simply enumerate the errors within the EntityValida...
How do I unset an element in an array in javascript?
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@ThiefMaster - Care to em>x m>plain? I don't know what that means and keen to learn. As always, an edit is a 1,000,000 times better than an off-hand comment; you should know that with the amount of rep you have.
– going
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Fill between two vertical lines in matplotlib
I went through the em>x m>amples in the matplotlib documentation, but it wasn't clear to me how I can make a plot that fills the area between two specific vertical lines.
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What does the slash mean in help() output?
...t are positional-only. Positional-only parameters are the ones without an em>x m>ternally-usable name. Upon calling a function that accepts positional-only parameters, arguments are mapped to parameters based solely on their position.
The syntam>x m> is now part of the Python language specification, as of v...
How do you round a number to two decimal places in C#?
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Here's some em>x m>amples:
decimal a = 1.994444M;
Math.Round(a, 2); //returns 1.99
decimal b = 1.995555M;
Math.Round(b, 2); //returns 2.00
You might also want to look at bankers rounding / round-to-even with the following overload:
Math...
Listing all permutations of a string/integer
A common task in programming interviews (not from my em>x m>perience of interviews though) is to take a string or an integer and list every possible permutation.
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Why do m>x m>86-64 instructions on 32-bit registers zero the upper part of the full 64-bit register?
In the m>x m>86-64 Tour of Intel Manuals , I read
3 Answers
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