[Solved] Python lambda returns true even with a false condition

You’re not calling your lambda as I’ve explained in my comment, but if you want it inline you can test as: if (lambda x: True == True)(None): print(“yes”) # prints if (lambda x: False == True)(None): print(“yes”) # doesn’t print Or more general, since you’re not actually using any arguments in your lambdas: if (lambda: … Read more

[Solved] Can’t use ‘contains’ in LINQ [closed]

You are facing problem on this line (result => result.SiteUrl.Contains(last.ToString()); Can you please check that SiteUrl is type of string otherwise it not going to work for you. because last is type of string and Contains is method supported by string type … or otherwise last need to be enumebrable collection and siteurl also enumerable … Read more

[Solved] Java – Can I concatenate a String with a lambda? How?

yshavit: What you’re trying to do isn’t easy/natural to do in Java. You’re basically trying to write an expression which creates and immediately invokes a method, basically as a way of grouping a bunch of statements together (and also providing an enclosed scope) to get a single value. It’s not an unreasonable thing, and in … Read more

[Solved] Java 8 — Lambda Expression [closed]

If you want to create a function which adds 1 to its input, the method to create that function doesn’t need an parameters… but then you need to call that function in order to execute it. I suspect you wanted: import java.util.function.Function; public class LambdaExpression { public static Function<Integer, Integer> create() { Function<Integer, Integer> f … Read more

[Solved] How to convert java list of objects to 2D array?

Not 100% sure what you are asking, but I’ll give it a try. Assuming you have a list of Points… List<Point2D> points = Arrays.asList(new Point2D.Double(12., 34.), new Point2D.Double(56., 78.)); … you can turn that list into a 2D-array like this: double[][] array = points.stream() .map(p -> new double[] {p.getX(), p.getY()}) .toArray(double[][]::new); … or into a … Read more

[Solved] Group by a nested list of object based on date [closed]

var temp = dbconnect.tblAnswerLists .Where(i => i.StudentNum == studentNumber && i.username==objstu.Return_SupervisorUserName_By_StudentNumber(studentNumber)) .ToList() // <– This will bring the data into memory. .Select(i => new PresentClass.supervisorAnswerQuesttionPres { answerList = Return_Answer_List(studentNumber,i.dateOfAnswer.Value.Date), questionList = Return_Question_List(studentNumber, i.dateOfAnswer.Value.Date), date = ConvertToPersianToShow(i.dateOfAnswer.Value.Date) }) .GroupBy(i => i.date) .OrderByDescending(i => i.Key) .ToList(); temp will actually be of type List<IGrouping<string, PresentClass.supervisorAnswerQuesttionPres>>. 2 solved Group … Read more

[Solved] Java Lambda groupby reducing with transformation [closed]

I think the problem is the new ObjStr2() in your second collector. You’re using the same starting element for all groups. You’re concatenating everything to the same object, and because this is mutable, everything is appended to that same object. Instead, make your doReduce return a new object: static ObjStr2 doReduce(ObjStr2 a, ObjStr2 b) { … Read more