How do you put multiple method calls (e.g 'get' in the below case) in a block? package Routes; import org.jooby.mvc.Path; public class UserRoutes extends BaseRoutes { { get("/users", (req, resp) -> { resp.send("Uses index"); }); get
I'm currently working on abstract code that can handle operations on any grid-like structure. In lieu of concrete methods, I've been trying to develop a framework that accepts lambda expressions and provides functionality based on directional relatio
I've a supplier table filled with supplier objects, supplierID is the primary key here. I've to find all products supplied by these suppliers. Since there is a many-many relationship, I've a bridge table in between SupplierProducts, with supplierID a
I like the look of linq/lambda statement and wonder about the performance of this var temp = list1.ForEach(x => list2.ForEach(y => Tuple.Create(y[1]+" "+y[2]+" "+x[0]+" "+x[1]) ); compared to this: foreach(var x in list
From a book I'm recently reading: First:
I'm trying to make a function that accepts a shared pointer to some functor. With manually crafted functors there're no problems, but with lambda there are. I know that I can't use decltype with lambda - every new lambda declaration creates a new typ
I have a method that takes a parameter which is a reference to a base class and I enqueue invocations of the method body by wrapping the method implementation in a queue<function<void()>> The issue is that I was hoping to capture the method's
I am going through the lambda architecture and understanding how it can be used to build fault tolerant big data systems. I am wondering how batch layer is useful when everything can be stored in realtime view and generate the results out of it? is i
I would like to add certain offset to all the data stored in std::array container: std::array<double, 256> data; ReadData(data); // apply data offset const double OFFSET = 0.123; data += OFFSET; It can be done with e.g. std::for_each and lambda. std
This question already has an answer here: Why does list.append evaluate to false? 6 answers I've got a list of strings, where each string contains a datestring in the second part, e.g.: alist = ['foo_20150901', 'bar_20150801', 'baz_20150701'] Now I w
Can anybody please tell me what is happening in below code in simple English, specifically around the usage of => and += symbols: var ls = new LibraryServiceClient(AppSettings.Get("LibraryServiceBaseAddress"), SessionId, App.Id, _user.UUID);
I have a Map<String, List<Object>> multiFieldMap and I need to itereate over its value set and add the value to multiFieldsList as below public List<Object> fetchMultiFieldsList() { List<Object> multiFieldsList = new ArrayList<O
I'm starting to learn about Java 8 streams and lambdas expressions. I want to iterate a collection but I'm getting a compilation error. I understand why is happening this error but I don't know how to get rid of it. Below the code: List<TT021OrderDet
I have asked a similar question before overloading operator >> for lambdas But i did not explained what i really wanted . I am writing a simple wrapper around sqlite3 C api . this is my project on github => sqlite modern cpp I want to overload th
I'm trying to find all posts in CRM 2011 that have a reference number that matches a string. The input string could have more or less leading zeros than the reference number in CRM. This is the logic I want to achieve, ie leading zeros dont matter. T
We are using Xamarin with SQLiteNet as ORM. In our data layer class we have the method below. filter = ri => ri.ItemVersioniId == itemVersionId; The method is getting the records matching the Id. If the lambda expression is hardcoded, instead of usin
How can I convert this LINQ query from query syntax to method syntax? I am performing a co-related query operation. var query = (from r in objEntities.Employee where r.Location == (from q in objEntities.Department where q.Location == r.Location selec
in C++11 a lambda function is an object, and it should be possible to call make_tuple with it, right? void foobar() { auto t = std::make_tuple([](){ std::make_shared<int>(); }); } This code works for me. Now what happens if we add a variadic templat
In my script (for Ruby >= 1.9) below I defined a Table class, which responsability is to generate 2 to 10 addition or multiplication table (chosen with a parameter). Then I call table method from a new Table instance in order to print result in a fil
Using code from http://ideone.com/5MHVz I am curious how is it possible that I can bind a lambda function (inline) to a C style function pointer but I cannot do this with a class function even if there is no state involved. It must be some fundamenta
I'm trying, unsuccessfully, to enumerate through a List<Func<InstagramUser,bool>> to filter a collection of List<InstagramUser>. My code compiles, but just returns the whole list, unfiltered, when display() is invoked. My question is, wh
I'm trying the lambda-expressions from the new standard, and still don't understand them quite well. Let's say I have a lambda somewhere in my code, e.g. in my main: int main( int argc, char * argv[]) { //some code [](int x, int y)->float { return st
I need to do select and foreach but it is not working. How can I do this? Ds ds = new Ds(); //DataSet Ds.HousesRow houseRow= ds.House.NewHousesRow(); houseRow.color= "red"; houseRow.date= new DateTime(); houseRow.description= "ZZZ"; ds
Is there an equivalent to the continue statement in ForEach method? List<string> lst = GetIdList(); lst.ForEach(id => { try { var article = GetArticle(id); if (article.author.contains("Twain")) { //want to jump out of the foreach now //
Here's a class public class Repository<T> { T GetSingle(Expression<Func<T, bool>> condition); } And then in another class that takes a generic type argument I have something like: repo = new Repository<TEntity>(); repo.GetSingle(x=
I would like to pass a lambda to a funciton. This boost::function<void()> fncPtr(boost::bind<void>([](){/* something */})); works, but if the lambda had a parameter, I don't know how to do it properly: boost::function<void(bool)> fncPtr(
I have a list of tags that I would like to add to a url string, separated by commas ('%2C'). How can I do this ? I was trying : >>> tags_list ['tag1', ' tag2'] >>> parse_string = "http://www.google.pl/search?q=%s&restofurl"
I've spent hours with this but haven't managed... Please see example below - How can this be done? The idea is to build a compiled expression of type Func<dynamic, dynamic> given an Expression<Func<T1,T2>> passed by the class' consumer.
Why should I use #' together with lambda? It is usually written that way, so I guess it is good form. But these lines seem equal to me: > (mapcar #'(lambda (x) (+ x 1)) '(1 2 3)) (2 3 4) > (mapcar (lambda (x) (+ x 1)) '(1 2 3)) (2 3 4) Anyone care t
What is the best way of dynamically writing LINQ queries and Lambda expressions? I am thinking of applications where the end user can design business logic rules, which then must be executed. I am sorry if this is a newbie question, but it would be g
