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What is tail recursion?
...lts in the last statement being in the form of (return (recursive-function params)). Basically, the return value of any given recursive step is the same as the return value of the next recursive call.
The consequence of this is that once you are ready to perform your next recursive step, you don't ...
Break promise chain and call a function based on the step in the chain where it is broken (rejected)
.../*
* simple wrapper to check if rejection
* has already been handled
* @param function real error handler
*/
function createHandler(realHandler) {
return function(error) {
if (error.breakChain) {
return q.reject(error);
}
realHandler(error);
error....
Default value of function parameter
...n() {
Add(4);
}
The compilation of test.cpp will not see the default parameter declaration, and will fail with an error.
For this reason, the default parameter definition is usually specified in the function declaration:
lib.h
int Add(int a, int b = 3);
...
How to return smart pointers (shared_ptr), by reference or by value?
...void
needless copies:
get_names(std::vector<std::string>& out_param );
...
std::vector<std::string> names;
get_names( names );
Unfortunately, this approach is far from ideal.
The code grew by 150%
We’ve had to drop const-ness because we’re mutating names.
As ...
Why is 'false' used after this simple addEventListener function?
...
According to MDN Web Docs, the third parameter is:
useCapture
If true, useCapture indicates that the user wishes to
initiate capture. After initiating
capture, all events of the specified
type will be dispatched to the
registered listener before be...
Why are arrays of references illegal?
...stantiating some stl template classes using an array as a 'class' template parameter, and see what happens. You can't return them, assign them, pass them as parameters. ( an array param is treated as a pointer). But it is legal to make arrays of arrays.
References do have a size that the compiler ca...
Use of Initializers vs Constructors in Java
....
Constructors are not inherited, though. (They only call super() [i.e. no parameters] implicitly or you have to make a specific super(...) call manually.)
This means it is possible that a implicit or exclicit super(...) call might not initialize the subclass as intended by the parent class.
Consi...
How to handle screen orientation change when progress dialog and background thread active?
...r mHandler;
MyDataObject mDataObject;
// constructor with handler param
public MyHandler(..., Handler h) {
...
mHandler = h;
}
public void setHandler(Handler h) { mHandler = h; } // for handler swapping after config change
public MyDataObject getDataObject()...
Structs versus classes
...value-by-value, class objects are passed reference-by-value and ref marked params pass reference-by-reference.
– Paul Ruane
Oct 15 '10 at 13:56
10
...
Changing names of parameterized tests
Is there a way to set my own custom test case names when using parameterized tests in JUnit4?
12 Answers
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