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Difference between Inheritance and Composition
...r example :
class X implements R
{}
class Y implements R
{}
public class Test{
R r;
}
In Test class using r reference I can invoke methods of X class as well as Y class. This flexibility was never there in inheritance
3) Another great advantage : Unit testing
public class X {
p...
Check existence of input argument in a Bash shell script
... [ -z "$1" ]
then
echo "No argument supplied"
fi
The -z switch will test if the expansion of "$1" is a null string or not. If it is a null string then the body is executed.
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How to check if an object is nullable?
... boxed, but you can with generics:
- so how about below. This is actually testing type T, but using the obj parameter purely for generic type inference (to make it easy to call) - it would work almost identically without the obj param, though.
static bool IsNullable<T>(T obj)
{
if (obj =...
How to check if a map contains a key in Go?
...
bool. Set the map entry to true to put the value in the set, and then
test it by simple indexing.
attended := map[string]bool{
"Ann": true,
"Joe": true,
...
}
if attended[person] { // will be false if person is not in the map
fmt.Println(person, "was at the meeting")
}
S...
Start thread with member function
...y to implement spawn() so that it returns a std::thread that executes test() ?
5 Answers
...
Any way to Invoke a private method?
...ccepted are obj, methodName and the parameters. For example
public class Test {
private String concatString(String a, String b) {
return (a+b);
}
}
Method concatString can be invoked as
Test t = new Test();
String str = (String) genericInvokeMethod(t, "concatString", "Hello", "Mr.x");
...
Understanding the difference between Object.create() and new SomeFunction()
... Crockford's shim.
The method is starting to be natively implemented on latest browsers, check this compatibility table.
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Programmatically shut down Spring Boot application
...on.exit(applicationContext, exitCodeGenerator);
}
Inside the Integration tests you can achieved it by adding @DirtiesContext annotation at class level:
@DirtiesContext(classMode=ClassMode.AFTER_CLASS) - The associated ApplicationContext will be marked as dirty after the test class.
@DirtiesCon...
AngularJS : Initialize service with asynchronous data
...therService wait for MyService to get initialized?
– testing123
Apr 30 '13 at 13:07
2
...
Why use Object.prototype.hasOwnProperty.call(myObj, prop) instead of myObj.hasOwnProperty(prop)?
...sability of calling some other hasOwnProperty method instead without first testing if that is a good idea or not.
Edit
I suspect that the reason for using Object.prototype.hasOwnProperty.call is that in some browsers, host objects don't have a hasOwnProperty method, using call and the built–in m...