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What's the meaning of “=>” (an arrow formed from equals & greater than) in JavaScript?
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What It Is
This is an arrow function. Arrow functions are a short syntax, introduced by ECMAscript 6, that can be used similarly to the way you would use function expressions. In other words, you can often use them in place of expressions like function (foo) {...}. But they have some importa...
Dependent DLL is not getting copied to the build output folder in Visual Studio
I have a visual studio solution.
I have many projects in the solution.
There is one main project which acts as the start up and uses other projects.
There is one project say "ProjectX". Its reference is added to main project.
The ProjectX references another .NET dll (say abc.dll) that isn't part of ...
Scala @ operator
...ble. Consider the following, for instance:
val o: Option[Int] = Some(2)
You can easily extract the content:
o match {
case Some(x) => println(x)
case None =>
}
But what if you wanted not the content of Some, but the option itself? That would be accomplished with this:
o match {
ca...
How to sleep for five seconds in a batch file/cmd [duplicate]
...capture the screen after five seconds, such as taking an image being displayed by the webcam. (Run the script and smile at the camera, for example.)
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Multiple arguments vs. options object
When creating a JavaScript function with multiple arguments, I am always confronted with this choice: pass a list of arguments vs. pass an options object.
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What is the Java ?: operator called and what does it do?
I have been working with Java a couple of years, but up until recently I haven't run across this construct:
16 Answers
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List comprehension: Returning two (or more) items for each item
...it import timeit
f = lambda x: x + 2
g = lambda x: x ** 2
def fg(x):
yield f(x)
yield g(x)
print timeit(stmt='list(chain.from_iterable((f(x), g(x)) for x in range(3)))',
setup='gc.enable(); from itertools import chain; f = lambda x: x + 2; g = lambda x: x ** 2')
print timeit...
How do I update the GUI from another thread?
Which is the simplest way to update a Label from another Thread ?
47 Answers
47
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Subclassing a Java Builder class
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You can solve it using generics. I think this is called the "Curiously recurring generic patterns"
Make the return type of the base class builder methods a generic argument.
public class NutritionFacts {
private final ...
How to make vim paste from (and copy to) system's clipboard?
...ke other editors, vim stores copied text in its own clipboard. So, it's very hard for me to copy some text from a webpage and paste it into the current working file. It so happens I have to either open gedit or type it manually.
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