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How to cast Object to its actual type?
...on
obj.GetType().GetMethod("MyFunction").Invoke(obj, null);
// interface
IFoo foo = (IFoo)obj; // where SomeType : IFoo and IFoo declares MyFunction
foo.MyFunction();
// dynamic
dynamic d = obj;
d.MyFunction();
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inline conditionals in angular.js
...rn input ? trueValue : falseValue;
};
});
and can be used like this:
{{foo == "bar" | iif : "it's true" : "no, it's not"}}
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How does type Dynamic work and how to use it?
...four different methods:
selectDynamic - allows to write field accessors: foo.bar
updateDynamic - allows to write field updates: foo.bar = 0
applyDynamic - allows to call methods with arguments: foo.bar(0)
applyDynamicNamed - allows to call methods with named arguments: foo.bar(f = 0)
To use one ...
Is it better to return null or empty collection?
...ut properties, always set your property once and forget it
public List<Foo> Foos {public get; private set;}
public Bar() { Foos = new List<Foo>(); }
In .NET 4.6.1, you can condense this quite a lot:
public List<Foo> Foos { get; } = new List<Foo>();
When talking about m...
GNU Makefile rule generating a few targets from a single source file
I am attempting to do the following. There is a program, call it foo-bin , that takes in a single input file and generates two output files. A dumb Makefile rule for this would be:
...
Assert equals between 2 Lists in Junit
... values and nothing else, in order as stated in the javadoc.
Suppose a Foo class where you add elements and where you can get that.
A unit test of Foo that asserts that the two lists have the same content could look like :
import org.assertj.core.api.Assertions;
import org.junit.jupiter.api.Tes...
Pass a JavaScript function as parameter
...s a function, just reference it by name without the parentheses:
function foo(x) {
alert(x);
}
function bar(func) {
func("Hello World!");
}
//alerts "Hello World!"
bar(foo);
But sometimes you might want to pass a function with arguments included, but not have it called until the callback...
How to set the prototype of a JavaScript object that has already been instantiated?
Suppose I have an object foo in my JavaScript code. foo is a complex object and it is generated somewhere else. How can I change the prototype of the foo object?
...
Can I export a variable to the environment from a bash script without sourcing it?
...he script in the context of the calling shell:
$ cat set-vars1.sh
export FOO=BAR
$ . set-vars1.sh
$ echo $FOO
BAR
Another way is to have the script, rather than setting an environment variable, print commands that will set the environment variable:
$ cat set-vars2.sh
#!/bin/bash
echo export FO...
How to reference a method in javadoc?
...Method in the same class:
/** See also {@link #myMethod(String)}. */
void foo() { ... }
Method in a different class, either in the same package or imported:
/** See also {@link MyOtherClass#myMethod(String)}. */
void foo() { ... }
Method in a different package and not imported:
/** See also {@l...