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How to print to stderr in Python?
... used in the same way as the standard print function:
>>> print("Test")
Test
>>> eprint("Test")
Test
>>> eprint("foo", "bar", "baz", sep="---")
foo---bar---baz
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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...
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...
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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Start thread with member function
...y to implement spawn() so that it returns a std::thread that executes test() ?
5 Answers
...
How to print out all the elements of a List in Java?
... method) to have a meaningful output
See the below example:
public class TestPrintElements {
public static void main(String[] args) {
//Element is String, Integer,or other primitive type
List<String> sList = new ArrayList<String>();
sList.add("string1");
...
Django: How to manage development and production settings?
...ath.
So, let's assume you created myapp/production_settings.py and myapp/test_settings.py in your source repository.
In that case, you'd respectively set DJANGO_SETTINGS_MODULE=myapp.production_settings to use the former and DJANGO_SETTINGS_MODULE=myapp.test_settings to use the latter.
From he...
AngularJS : Initialize service with asynchronous data
...therService wait for MyService to get initialized?
– testing123
Apr 30 '13 at 13:07
2
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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...