In this post, we’ll learn the difference between __str__ and __repr__ in Python. As answered by Ned, my rule of thumb: __repr__ is for developers, __str__ is for customers. Now, what is the difference …
Learn MoreShort explanation: Suppose, you have a class String: Now, if you try: The character ‘x’ will be implicitly converted to int and then the String(int) constructor will be called. But, this is not what the user might …
Learn MoreQuery explained: Eclipse issues warnings when a serialVersionUID is missing. The serializable class Foo does not declare a static final serialVersionUID field of type long What is serialVersionUID and why is it important? Please …
Learn MoreIn this post, we’ll discuss services, factories, and providers in AngularJs and the differences between them in detail. So please follow through the whole post to get the best out …
Learn MoreQuery: I’ve always been one to simply use: I use the interface as the type name for portability, so that when I ask questions such as these I can rework my …
Learn MoreSample query: I just had an interview where I was asked to create a memory leak with Java. Needless to say, I felt pretty dumb having no clue on how to even …
Learn MoreQuery explained: I saw some code that seems to use an operator I don’t recognize, in the form of two exclamation points, like so: !!. Can someone please tell me what …
Learn MoreThere are several differences between HashMap and Hashtable in Java: Hashtable is synchronized, whereas HashMap is not. This makes HashMap better for non-threaded applications, as unsynchronized Objects typically perform better than synchronized ones. Hashtable does not allow null keys or values. HashMap allows one null key and …
Learn MoreAnswer: Maybe a bit of example code will help: Notice the difference in the call signatures of foo, class_foo and static_foo: Below is the usual way an object instance calls a method. The object …
Learn MoreAfter I upgraded to the latest stable node and npm, I tried npm install moment –save. It saves the entry in the package.json with the caret ^ prefix. Previously, it was a tilde ~ prefix. In this post, we’ll be …
Learn MoreQuery: I’m stuck and cannot escape. It says: But when I type that it simply appears in the object body. How to exit the Vim editor? Answer #1: Hit the Esc key …
Learn MoreSample query: People talk about URLs, URIs, and URNs as if they’re different things, but they look the same to the naked eye. What are the distinguishable differences between them? What is the …
Learn More