Binary floating point math is like this. In most programming languages, it is based on the IEEE 754 standard. The crux of the problem is that numbers are represented in this format as a whole number times a power of two; rational numbers (such as 0.1, which is 1/10) whose denominator is not a power … Read more
What is the cause? Bottom Line You are trying to use something that is null (or Nothing in VB.NET). This means you either set it to null, or you never set it to anything at all. Like anything else, null gets passed around. If it is null in method “A”, it could be that method … Read more
Locked. There are disputes about this answer’s content being resolved at this time. It is not currently accepting new interactions. You can’t parse [X]HTML with regex. Because HTML can’t be parsed by regex. Regex is not a tool that can be used to correctly parse HTML. As I have answered in HTML-and-regex questions here so … Read more
The correct way to avoid SQL injection attacks, no matter which database you use, is to separate the data from SQL, so that data stays data and will never be interpreted as commands by the SQL parser. It is possible to create an SQL statement with correctly formatted data parts, but if you don’t fully … Read more
→ For a more general explanation of asynchronous behaviour with different examples, see Why is my variable unaltered after I modify it inside of a function? – Asynchronous code reference → If you already understand the problem, skip to the possible solutions below. The problem The A in Ajax stands for asynchronous. That means sending … Read more
When you declare a reference variable (i.e., an object), you are really creating a pointer to an object. Consider the following code where you declare a variable of primitive type int: int x; x = 10; In this example, the variable x is an int and Java will initialize it to 0 for you. When … Read more
Basically, a minimal reproducible example (MRE) should enable others to exactly reproduce your issue on their machines. A MRE consists of the following items: a minimal dataset, necessary to demonstrate the problem the minimal runnable code necessary to reproduce the error, which can be run on the given dataset all necessary information on the used … Read more