Closed. This question needs to be more focused. It is not currently accepting answers. Closed 2 years ago. Locked. This question and its answers are locked because the question is off-topic but has historical significance. It is not currently accepting new answers or interactions. Someone suggested I use an ORM for a project that I’m … Read more
Why do some numbers lose accuracy when stored as floating point numbers? For example, the decimal number 9.2 can be expressed exactly as a ratio of two decimal integers (92/10), both of which can be expressed exactly in binary (0b1011100/0b1010). However, the same ratio stored as a floating point number is never exactly equal to … Read more
Ok this is more of a computer science question, than a question based on a particular language, but is there a difference between a map operation and a foreach operation? Or are they simply different names for the same thing? 9 Answers 9
Closed. This question is opinion-based. It is not currently accepting answers. Closed last month. Locked. This question and its answers are locked because the question is off-topic but has historical significance. It is not currently accepting new answers or interactions. Sorry for the waffly title – if I could come up with a concise title, … Read more
Closed. This question is opinion-based. It is not currently accepting answers. Closed 1 year ago. Locked. This question and its answers are locked because the question is off-topic but has historical significance. It is not currently accepting new answers or interactions. I hope this qualifies as a programming question, as in any programming tutorial, you … Read more
When are objects or something else said to be “first-class” in a given programming language, and why? In what way do they differ from languages where they are not? When one says “everything is an object” (like in Python), do they indeed mean that “everything is first-class”? 5 Answers 5
I know a map is a data structure that maps keys to values. Isn’t a dictionary the same? What is the difference between a map and a dictionary1? 1. I am not asking for how they are defined in language X or Y (which seems to be what generally people are asking here on SO), … Read more
I’ve been a professional software engineer for about a year now, having graduated with a CS degree. I’ve known about assertions for a while in C++ and C, but had no idea they existed in C# and .NET at all until recently. Our production code contains no asserts whatsoever and my question is this… Should … Read more
When is it right for a constructor to throw an exception? (Or in the case of Objective C: when is it right for an init’er to return nil?) It seems to me that a constructor should fail — and thus refuse to create an object — if the object isn’t complete. I.e., the constructor should … Read more
While writing this answer, I had to match exclusively on linebreaks instead of using the s-flag (dotall – dot matches linebreaks). The sites usually used to test regular expressions behave differently when trying to match on \n or \r\n. I noticed Regex101 matches linebreaks only on \n (example – delete \r and it matches) RegExr … Read more
