dynamic

问题 Because of some business decisions I need to change a bit of what I was doing. Yay me. :) Currently, I have: public IOrderedQueryable<ProductDetail> GetProductList(string productGroupName, string productTypeName, Dictionary<string,List<string>> filterDictionary) { string whereClause = "ProductGroupName='" + productGroupName + "' AND ProductTypeName='" + productTypeName + "'"; string comma = ""; foreach (KeyValuePair<string, List<string>> myKVP in filterDictionary) { comma = ""; if (myKVP

问题 I have a page where users can create tags (much like here in stackoverflow), which are then sent(POST) to the back end to be stored in a database. The user can make tags but also remove them before finally hitting Submit. In the DOM the tags are generated along with an 'x' button. The 'x' button removes the element from the DOM, but the trouble comes when removing from the array. The closest I could get to a solution was this question, however I couldn't get it to quite work for me. Here's

问题 This question already has answers here : Convert class to dynamic and add properties (4 answers) can one convert a dynamic object to an ExpandoObject (c#) (2 answers) How to extend an existing object in c# 4.0 using dynamics (1 answer) Closed 2 years ago . I've read a lot about how ExpandoObject can be used to dynamically create objects from scratch by adding properties, but I haven't yet found how you do the same thing starting from a non-dynamic C# object that you already have. For instance

问题 Is there a way to dynamically instantiate a Scala case class having one or more default parameters specified? I'm looking for the dynamic (reflection-based) equivalent of this: case class Foo( name:String, age:Int = 21 ) val z = Foo("John") Right now if I try this I get an exception: val const = Class.forName("Foo").getConstructors()(0) val args = Array("John").asInstanceOf[Array[AnyRef]] const.newInstance(args:_*) If I add a value for age in my parameter array, no problem. 回答1: Argument with

问题 Is there a way to dynamically instantiate a Scala case class having one or more default parameters specified? I'm looking for the dynamic (reflection-based) equivalent of this: case class Foo( name:String, age:Int = 21 ) val z = Foo("John") Right now if I try this I get an exception: val const = Class.forName("Foo").getConstructors()(0) val args = Array("John").asInstanceOf[Array[AnyRef]] const.newInstance(args:_*) If I add a value for age in my parameter array, no problem. 回答1: Argument with

问题 I need to dynamically load/render part of a page in nodejs (v1.8.15) with express (>3.0) framework. Generally, I want to create a single-page app. I have a menu at the top of the page with links. Clicking on the links will change the content below, as in AJAX page loading. For example: >home|login|signup|chat ..content for home.. If I press the 'signup' link: home|login|>signup|chat ..content for signup.. In express I have routes on the server: var express = require('express'); var app =

问题 I need to dynamically load/render part of a page in nodejs (v1.8.15) with express (>3.0) framework. Generally, I want to create a single-page app. I have a menu at the top of the page with links. Clicking on the links will change the content below, as in AJAX page loading. For example: >home|login|signup|chat ..content for home.. If I press the 'signup' link: home|login|>signup|chat ..content for signup.. In express I have routes on the server: var express = require('express'); var app =

问题 This question already has answers here : Is delete[] equal to delete? (6 answers) Closed 4 years ago . I have a very quick question: What is the difference between new[ ] / delete [ ] vs new / delete in C++ when it comes to Dynamic memory? Is new[ ] / delete [ ] not belong to Dynamic memory? 回答1: new allocates memory for a single item and calls its constructor, and delete calls its destructor and frees its memory. new[] allocates memory for an array of items and calls their constructors, and

问题 why and how this works in the below code dynamic x = ( c== 'a') ? new D1() :x= new D2(); but not this dynamic x = ( c== 'a') ? new D1() : new D2(); Code class Program { static void Main(string[] args) { var c = Console.ReadKey().KeyChar; dynamic x = ( c== 'a') ? new D1() :x= new D2(); x.Print(); Console.ReadKey(); } } class D1 { public void Print() { Console.WriteLine("D1"); } } class D2 { public void Print() { Console.WriteLine("D2"); } } 回答1: This has nothing to do with dynamic. This is

问题 why and how this works in the below code dynamic x = ( c== 'a') ? new D1() :x= new D2(); but not this dynamic x = ( c== 'a') ? new D1() : new D2(); Code class Program { static void Main(string[] args) { var c = Console.ReadKey().KeyChar; dynamic x = ( c== 'a') ? new D1() :x= new D2(); x.Print(); Console.ReadKey(); } } class D1 { public void Print() { Console.WriteLine("D1"); } } class D2 { public void Print() { Console.WriteLine("D2"); } } 回答1: This has nothing to do with dynamic. This is