inference

Why can't these generic type parameters be inferred?

感情迁移 提交于 2019-12-05 18:04:11
Given the following interfaces/classes: public interface IRequest<TResponse> { } public interface IHandler<TRequest, TResponse> where TRequest : IRequest<TResponse> { TResponse Handle(TRequest request); } public class HandlingService { public TResponse Handle<TRequest, TResponse>(TRequest request) where TRequest : IRequest<TResponse> { var handler = container.GetInstance<IHandler<TRequest, TResponse>>(); return handler.Handle(request); } } public class CustomerResponse { public Customer Customer { get; set; } } public class GetCustomerByIdRequest : IRequest<CustomerResponse> { public int

Scala compiler cannot infer mix-in type for pattern matching

北城余情 提交于 2019-12-05 05:13:04
I have a use case for algebraic groups over finite permutation sets. Because I would like to use the group for various permutation classes which are otherwise unrelated, I would like to do this as a mix-in trait. Here's an excerpt of my attempt trait Permutation[P <: Permutation[P]] { this: P => def +(that: P): P //final override def equals(that: Any) = ... //final override lazy val hashCode = ... // Lots of other stuff } object Permutation { trait Sum[P <: Permutation[P]] extends Permutation[P] { this: P => val perm1, perm2: P // Lots of other stuff } private object Sum { def unapply[P <:

Type inference in sequence expressions in F#

♀尐吖头ヾ 提交于 2019-12-05 02:47:56
I think I do not quite understand how F# infers types in sequence expressions and why types are not correctly recognized even if I specify the type of the elements directly from "seq". In the following F# code we have a base class A and two derived classes, B and C: type A(x) = member a.X = x type B(x) = inherit A(x) type C(x) = inherit A(x) If I try to "yield" their instances in a simple sequence expressions, I get two errors: // Doesn't work, but it makes sense. let testSeq = seq { yield A(0) yield B(1) // Error, expected type: A yield C(2) // Error, expected type: A } That can make sense,

How to Batch Multiple Videoframes before run Tensorflow Inference Session

ぃ、小莉子 提交于 2019-12-05 02:15:17
问题 I made a project that basically uses googles object detection api with tensorflow. All i am doing is inference with a pre-trained model: Which means realtime object detection where the Input is the Videostream of a webcam or something similar using OpenCV. Right now i got pretty decent performance results, but i want to further increase the FPS. Because what i experience is that Tensorflow uses my whole Memory while Inference but the GPU Usage is not maxed out at all (around 40% with a NVIDIA

How to Batch Multiple Videoframes before run Tensorflow Inference Session

有些话、适合烂在心里 提交于 2019-12-04 11:54:28
I made a project that basically uses googles object detection api with tensorflow. All i am doing is inference with a pre-trained model: Which means realtime object detection where the Input is the Videostream of a webcam or something similar using OpenCV. Right now i got pretty decent performance results, but i want to further increase the FPS. Because what i experience is that Tensorflow uses my whole Memory while Inference but the GPU Usage is not maxed out at all (around 40% with a NVIDIA GTX 1050 Laptop, and 6% on a NVIDIA Jetson Tx2). So my idea was to increase the GPU Usage by

understanding working of Drools guvnor

为君一笑 提交于 2019-12-04 02:29:50
问题 can any one plz let me know that how drool guvnor work i went to guvnor documentation but couldn't understand the core logic of how rules are processed and how we can use drools guvnor in coherence with java code Basically i want to know how java code interacts with drools guvnor api. 回答1: There is very less documentation about latest drool 6. I suggest you watch this presentation by Mark Proctor on drools 6 (Drools Project Lead at Red Hat) and visit his Youtube Channel to watch screencasts

Python tools/libraries for Semantic Web: state of the art? [closed]

喜夏-厌秋 提交于 2019-12-03 09:16:58
问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 4 years ago . What are the best (more or less mature, supporting more advanced logic, having acceptable performance, scalable to some extent) open source Semantic Web libraries and tools (RDF storage, reasoning, rules, queries) for Python nowadays? Historically Python tools (cwm) were among the first to appear, but it still

OWL: How to get inheritance of property relations between two classes from those of superclasses?

戏子无情 提交于 2019-12-02 06:12:58
问题 Let's say we have two classes named People and Disease . These classes are related by the Object Property has . :People :has :Disease People has subclass (or individual) John , and Disease has subclass (or individual) Cancer . :John a :People :Cancer a :Disease How can we get the relationship between these subclasses by inference? :John :has :Cancer 回答1: Before you can get to an answer, there are a number of misconceptions you'll need to resolve. First, subclass and individual are very

OWL: How to get inheritance of property relations between two classes from those of superclasses?

懵懂的女人 提交于 2019-12-02 01:23:22
Let's say we have two classes named People and Disease . These classes are related by the Object Property has . :People :has :Disease People has subclass (or individual) John , and Disease has subclass (or individual) Cancer . :John a :People :Cancer a :Disease How can we get the relationship between these subclasses by inference? :John :has :Cancer Before you can get to an answer, there are a number of misconceptions you'll need to resolve. First, subclass and individual are very different concepts. Individuals (instances) are members of classes. Subclass denotes a class is a subset of

TypeScript type inference/narrowing challenge

非 Y 不嫁゛ 提交于 2019-12-01 18:22:25
I'm currently trying to improve the types on some existing code. My code looks roughly like this: /* dispatcher.ts */ interface Message { messageType: string; } class Dispatcher<M extends Message> { on< MessageType extends M["messageType"], SubMessage extends M & { messageType: MessageType } >( messageType: MessageType, handler: (message: SubMessage) => void ): void { } } /* messages.ts */ interface AddCommentMessage { messageType: "ADD_COMMENT"; commentId: number; comment: string; userId: number; } interface PostPictureMessage { messageType: "POST_PICTURE"; pictureId: number; userId: number;