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Why is the Java main method static?
...c because otherwise there would be ambiguity: which constructor should be called? Especially if your class looks like this:
public class JavaClass{
protected JavaClass(int x){}
public void main(String[] args){
}
}
Should the JVM call new JavaClass(int)? What should it pass for x?
If not,...
How do I set the value property in AngularJS' ng-options?
...ck by obj.value">
</select>
How to remember this ugly stuff
To all the people who are having hard time to remember this syntax form: I agree this isn't the most easiest or beautiful syntax. This syntax is kind of an extended version of Python's list comprehensions and knowing that helps ...
Reduce, fold or scan (Left/Right)?
...
In general, all 6 fold functions apply a binary operator to each element of a collection. The result of each step is passed on to the next step (as input to one of the binary operator's two arguments). This way we can cumulate a result.
...
Why is my Spring @Autowired field null?
...of Control (IoC) container has three main logical components: a registry (called the ApplicationContext) of components (beans) that are available to be used by the application, a configurer system that injects objects' dependencies into them by matching up the dependencies with beans in the context,...
Entity Framework: “Store update, insert, or delete statement affected an unexpected number of rows (
...
That's a side-effect of a feature called optimistic concurrency.
Not 100% sure how to turn it on/off in Entity Framework but basically what it's telling you is that between when you grabbed the data out of the database and when you saved your changes someone ...
How to bind function arguments without binding this?
...;
Hope I got the syntax right there. What it does is create a function called withWrappedArguments() (to be pedantic it is an anonymous function assigned to the variable) that you can call any time any where and will always act with actualArg1Value and actualArg2Value, and anything else you want ...
HTML input textbox with a width of 100% overflows table cells
... the input with two divs, the outer has a 3px margin (which makes it 3px smaller than the td), the inner has a 3px padding. This makes the input 6px smaller than the td, which is what you wanted to begin with.
I am not sure about the mechanics of this, but it works.
In this simple example, it a...
Disabled UIButton not faded or grey
...or it. There are two options for you:
First way: If you want to apply for all your buttons in your app, so you can write extension for UIButton like this:
extension UIButton {
open override var isEnabled: Bool{
didSet {
alpha = isEnabled ? 1.0 : 0.5
}
}
}
Se...
Pointer to class data member “::*”
...ed in pluggable architectures, but once again producing an example in a small space defeats me. The following is my best (untested) try - an Apply function that would do some pre &post processing before applying a user-selected member function to an object:
void Apply( SomeClass * c, void (Som...
Applicatives compose, monads don't
...t a value in s can determine the behaviour of a computation in m t. Monads allow interference between the value and computation layers. The (<*>) operator allows no such interference: the function and argument computations don't depend on values. This really bites. Compare
miffy :: Monad m =&...