For reference types, == checks whether the references are equal, i.e. whether they point to the same object. For primitive types, == checks whether the values are equal. java.lang.Integer is a reference type. int is a primitive type. Edit: If one operand is of primitive type, and the other of a reference type that unboxes … Read more
Nasty little problem… I have been fooling around with this toy example: >>> arr = np.array([[‘one’, [1, 2, 3]],[‘two’, [4, 5, 6]]], dtype=np.object) >>> arr array([[‘one’, [1, 2, 3]], [‘two’, [4, 5, 6]]], dtype=object) My first guess was: >>> np.array(arr[:, 1]) array([[1, 2, 3], [4, 5, 6]], dtype=object) But that keeps the object dtype, so … Read more
format_exc() is really just etype, value, tb = sys.exc_info() return ”.join(format_exception(etype, value, tb, limit)) So if you have the exception type, value, and traceback ready, it should be easy. If you have just the exception, notice that format_exception() is essentially: a_list = [‘Traceback (most recent call last):\n’] a_list = a_list + format_tb(tb, limit) where limit … Read more
First, serialization is writing the object to a file ‘as it is’. AFAIK, you cannot choose file formats and all. The serialized object (in a file) has its own ‘file format’ If you want to write the contents of an object (or a list of objects) to a CSV file, you can do it yourself, … Read more
You may do like below, String dateStr = obj.getString(“birthdate”); SimpleDateFormat sdf = new SimpleDateFormat(“yyyy-MM-dd HH:mm:ss”); Date birthDate = sdf.parse(dateStr); //then user.setBirthdate(birthDate); Hope to help you 🙂
You can just use inheritance to do that : interface IA { one: number; two: number; } interface IC { other: number; four: number; } interface IB extends IA, IC { three: number; }
Whenever you look up a method via instance.name (and in Python 2, class.name), the method object is created a-new. Python uses the descriptor protocol to wrap the function in a method object each time. So, when you look up id(C.foo), a new method object is created, you retrieve its id (a memory address), then discard … Read more
In a shallow merge, the properties of the first object are overwritten with the same property values of the second object. Lets look at an example. Setup: var obj1 = { foo: { prop1: 42, }, }; var obj2 = { foo: { prop2: 21, }, bar: { prop3: 10, }, }; Shallow: var result … Read more
In the former, any code included is executed as soon as class B is created. In the latter, however, until you actually use the object, it won’t be instantiated. You can see the difference here: class A { println(“Creating a new A”) } class B { val a1 = new A { println(“a1”); def foo … Read more