python - What is a 'NoneType' object? - Stack Overflow
Jan 13, 2014 · NoneType is the type for the None object, which is an object that indicates no value. None is the return value of functions that "don't return anything". It is also a common …
What is a "method" in Python? - Stack Overflow
Can anyone, please, explain to me in very simple terms what a "method" is in Python? The thing is in many Python tutorials for beginners this word is used in such way as if the …
language agnostic - What is a callback function? - Stack Overflow
May 5, 2009 · What is a callback function?A not simple explanation is available on Wikipedia. However we can say it more simply: Using the callback principle is like giving a business card …
programming languages - What is a Namespace? - Stack Overflow
Jun 13, 2009 · I am going to provide a more commonplace description. Say my wife has a sister named Sue, and so do I. How can I tell them apart in a conversation? By using their last …
java - What is a JavaBean exactly? - Stack Overflow
A JavaBean is just a standard. It is a regular Java class, except it follows certain conventions: All properties are private (use getters/setters) A public no-argument constructor Implements …
language agnostic - What is a lambda (function)? - Stack Overflow
Aug 19, 2008 · I don't think it's necessarily accurate to say lambda functions are the same as anonymous functions. For some languages like JavaScript a lambda expression is a specific …
java - What is a StackOverflowError? - Stack Overflow
What is a StackOverflowError, what causes it, and how should I deal with them?
java - What exactly does a jar file contain? - Stack Overflow
However, I got curious to what each class contained and when I try to open one of the classes in the jar file, it tells me that I need a source file. A jar file is basically a zip file containing .class …
What is a CSRF token? What is its importance and how does it work?
Jan 18, 2021 · I am writing an application (Django, it so happens) and I just want an idea of what actually a "CSRF token" is and how it protects the data. Is the post data not safe if …
security - What is a keytab exactly? - Stack Overflow
May 9, 2017 · To answer your two questions: every user and service does not need a keytab file keytabs use symmetric key cryptography. I'm going to explain a bit more based on my …