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How do I access this object property with an illegal name?
...ibility:
$todolist = 'todo-list';
echo $x->$todolist;
If you wanted to convert it to an array, which can be a little more easily (ie the obvious $ret['todo-list'] accessing), this code is taken almost verbatim from Zend_Config and will convert for you.
public function toArray()
{
$array = a...
What does the thread_local mean in C++11?
...o data that is seemingly global or static storage duration (from the viewpoint of the functions using it) but in actual fact, there is one copy per thread.
It adds to the current automatic (exists during a block/function), static (exists for the program duration) and dynamic (exists on the heap bet...
Size of Matrix OpenCV
...
cv:Mat mat;
int rows = mat.rows;
int cols = mat.cols;
cv::Size s = mat.size();
rows = s.height;
cols = s.width;
Also note that stride >= cols; this means that actual size of the row can be greater than element size x cols. This is ...
How to check Google Play services version?
...
I found simple solution:
int v = getPackageManager().getPackageInfo(GoogleApiAvailability.GOOGLE_PLAY_SERVICES_PACKAGE, 0 ).versionCode;
But versionCode is deprecated in API 28, so you can use PackageInfoCompat:
long v = PackageInfoCompat.getLongV...
Regex Named Groups in Java
... groups ( http://www.regular-expressions.info/named.html ) so can anyone point me towards a third-party library that does?
...
Why use prefixes on member variables in C++ classes
...e for most of the "bad rap" that prefixes get.
This notation is largely pointless in strongly typed languages e.g. in C++ "lpsz" to tell you that your string is a long pointer to a nul terminated string, when: segmented architecture is ancient history, C++ strings are by common convention pointers ...
In C++, what is a “namespace alias”?
... simply, the #define won't work.
namespace Mine { class MyClass { public: int i; }; }
namespace His = Mine;
namespace Yours { class Mine: public His::MyClass { void f() { i = 1; } }; }
Compiles fine. Lets you work around namespace/class name collisions.
namespace Nope { class Oops { public: int...
Java Reflection: How to get the name of a variable?
..., here's an alternative (which I wouldn't use - see below):
public void printFieldNames(Object obj, Foo... foos) {
List<Foo> fooList = Arrays.asList(foos);
for(Field field : obj.getClass().getFields()) {
if(fooList.contains(field.get()) {
System.out.println(fiel...
Creating an R dataframe row-by-row
...me rows, concatenate them using c(), pass them to a matrix row-by-row, and convert that matrix to a dataframe.
For example, rows
dummydata1=c(2002,10,1,12.00,101,426340.0,4411238.0,3598.0,0.92,57.77,4.80,238.29,-9.9)
dummydata2=c(2002,10,2,12.00,101,426340.0,4411238.0,3598.0,-3.02,78.77,-9999.00,-...
How to prevent custom views from losing state across screen orientation changes
...w.BaseSavedState class.
public class CustomView extends View {
private int stateToSave;
...
@Override
public Parcelable onSaveInstanceState() {
//begin boilerplate code that allows parent classes to save state
Parcelable superState = super.onSaveInstanceState();
SavedState s...