Which syntax is java8 and where can I read more?

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

Generic return types and lambda function arguments

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

Smart pointer to lambda

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

Lambda Architecture - Why the Batch Process Layer

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

Advanced sorting lists with lambda

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

Clarification of the syntax using & ldquo; = & gt; & rdquo;

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);

Java 8: Lambda Card Expression

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

An operator overload for lambdas?

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

Compare strings with different zeros in CRM 2011 using lambda

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

SQLite Net Index and Lambda Expressions

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

Co-occurrence queries using lambda expressions

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

Store a lambda in a table obtained by switch, then use it

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

C ++ 11 - Link a C Style Reminder to a Class Member Function

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

Calling a lambda expression several times

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

How to use an expression with a generic

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=

Pass lambda with the parameter

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(

Parsing a list in a URL string

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"

Why use # 'with lambda?

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

Dynamic LINQ and Dynamic Lambda expressions?

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