I have the following function to get validation errors for a card. My question relates to dealing with GetErrors. Both methods have the same return type IEnumerable<ErrorInfo>. private static IEnumerable<ErrorInfo> GetErrors(Card card) { var errors = GetMoreErrors(card); foreach (var e in errors) yield return e; // further yield returns for more validation errors } Is … Read more
I have a generator object returned by multiple yield. Preparation to call this generator is rather time-consuming operation. That is why I want to reuse the generator several times. y = FunctionWithYield() for x in y: print(x) #here must be something to reset ‘y’ for x in y: print(x) Of course, I’m taking in mind … Read more
I heard about a “yield” keyword in JavaScript, but I found very poor documentation about it. Can someone explain me (or recommend a site that explains) its usage and what it is used for? 14 Answers 14
I have an IEnumerable<T> method that I’m using to find controls in a WebForms page. The method is recursive and I’m having some problems returning the type I want when the yield return is returnig the value of the recursive call. My code looks as follows: public static IEnumerable<Control> GetDeepControlsByType<T>(this Control control) { foreach(Control c … Read more
I understand Ruby and Python’s yield. What does Scala’s yield do? 10 Answers 10
I have seen this syntax in MSDN: yield break, but I don’t know what it does. Does anyone know? 8 s 8 It specifies that an iterator has come to an end. You can think of yield break as a return statement which does not return a value. For example, if you define a function … Read more
I’m having a hard time wrapping my brain around PEP 380. What are the situations where yield from is useful? What is the classic use case? Why is it compared to micro-threads? So far I have used generators, but never really used coroutines (introduced by PEP-342). Despite some similarities, generators and coroutines are basically two … Read more
I’m developing a console script for personal needs. I need to be able to pause for an extended amount of time, but, from my research, Node.js has no way to stop as required. It’s getting hard to read users’ information after a period of time… I’ve seen some code out there, but I believe they … Read more
In the How Can I Expose Only a Fragment of IList<> question one of the answers had the following code snippet: IEnumerable<object> FilteredList() { foreach(object item in FullList) { if(IsItemInPartialList(item)) yield return item; } } What does the yield keyword do there? I’ve seen it referenced in a couple places, and one other question, but … Read more
Want to improve this post? Provide detailed answers to this question, including citations and an explanation of why your answer is correct. without enough detail may be edited or deleted. What is the use of the yield keyword in Python? What does it do? For example, I’m trying to understand this code1: def _get_child_candidates(self, distance, … Read more