It signifies the end of the positional only parameters, parameters you cannot use as keyword parameters. Before Python 3.8, such parameters could only be specified in the C API. It means the key argument to __contains__ can only be passed in by position (range(5).__contains__(3)), not as a keyword argument (range(5).__contains__(key=3)), something you can do with … Read more
These are two different methodologies: №1 is LBYL (look before you leap) and №2 is EAFP (easier to ask forgiveness than permission). Pythonistas typically suggest that EAFP is better, with arguments in style of “what if a process creates the file between the time you test for it and the time you try to create … Read more
You can loop through keys like this: for (var key in data) { console.log(key); } This logs “Name” and “Value”. If you have a more complex object type (not just a plain hash-like object, as in the original question), you’ll want to only loop through keys that belong to the object itself, as opposed to … Read more
After searching through Apples Documentation about objc Runtime and according to this SO answer I finally got it working. I just want to share my results. unsigned int count; objc_property_t* props = class_copyPropertyList([MyObject class], &count); for (int i = 0; i < count; i++) { objc_property_t property = props[i]; const char * name = property_getName(property); … Read more
Here is an implementation of a locals() function. It will return a table of locals from the calling scope: function locals() local variables = {} local idx = 1 while true do local ln, lv = debug.getlocal(2, idx) if ln ~= nil then variables[ln] = lv else break end idx = 1 + idx end … Read more
Have a look at Obtaining Field Types from the Java Tutorial Trail: The Reflection API. Basically, what you need to do is to get all java.lang.reflect.Field of your class and call Field#getType() on each of them (check edit below). To get all object fields including public, protected, package and private access fields, simply use Class.getDeclaredFields(). … Read more
It’s necessary if you define QObject subclasses with the Q_OBJECT macro in a .cpp file. When you do so: qmake must generate rules inside your Makefile to invoke moc on that .cpp file. That special (hackish?) inclusion triggers qmake to do so, and tells it which would be moc‘s output file (teststring.moc) when invoked on … Read more
You can try this: unsigned int propertyCount = 0; objc_property_t * properties = class_copyPropertyList([self class], &propertyCount); NSMutableArray * propertyNames = [NSMutableArray array]; for (unsigned int i = 0; i < propertyCount; ++i) { objc_property_t property = properties[i]; const char * name = property_getName(property); [propertyNames addObject:[NSString stringWithUTF8String:name]]; } free(properties); NSLog(@”Names: %@”, propertyNames);
Another way to user JacksonObjectMapper is the convertValue ex: ObjectMapper m = new ObjectMapper(); Map<String,Object> mappedObject = m.convertValue(myObject, new TypeReference<Map<String, String>>() {});
I’m surprised that this question is so old and no one has taken the time to add the actual introspective way to do this, so here it is: The code you want to inspect… def template(func): def wrapper(*args, **kwargs): return func(*args, **kwargs) return wrapper baz = template che = template class Foo(object): @baz @che def … Read more