dynamic

问题 I am trying to add text over a set of dynamic images that I have added with Javascript. I have a loop in JavaScript that adds images that are located in an AWS by looping with an index i. I'd like to add the value of the index i in the bottom right side of each picture (hence, a dynamic tag based on the value of the index i). I have this so far. HTML: <section id="photos"></section> CSS: #photos { /* Prevent vertical gaps */ line-height: 0; -webkit-column-count: 5; -webkit-column-gap: 0px;

问题 I create an extension for UITableViewCell, and give the default method. Through the set<T: UITableViewCell> method, I want the setupData method can dynamic dispatch by the cell type. But it always failed, and the result jump to the fatalError. import UIKit class cell: UITableViewCell { func setupData<T>(_ data: T) { print(#function) } } class ViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() set(cell.self) } func set<T: UITableViewCell>(_ t: T.Type) { let

问题 I'm sure there is someone out there who can explain this clearly. I would have assumed that I could simply use: Dim pb As PictureBox then I could use pb = New PictureBox but apparently not. I would also assume I can set parameters pb.Width pb.Height pb.Top pb.Left etc. If anyone can help me create a picture box dynamically where I can set the properties I would be so grateful, thanks. I'm also sorry if this question has already been asked, but I have been looking for a few hours now and

问题 consider follow simple class public class SomeType { public static int Fn(dynamic arg) { return 1; } } and the follow statement dynamic value = 10; var a = SomeType.Fn(null); var b = SomeType.Fn(value); the type of a is correct ( int ) the type of b is wrong ( dynamic ) I can't use intellisense any more on b until I do a dummy recast (int)SomeType.Fn(value) for what was already prototype to return an integer. the question is, why the dynamic in the argument makes the intellisense to change my

问题 class someClass { public int Id { get; set; } public string Name{ get; set; } ... public string someProperty { get; set; } } Expression<Func<someClass, object>> selector = null; selector = k => new { k.Id ,k.Name }; var serult = myData.Select(selector); // .Select(p=> new {p.Name , p.Id}) etc. This sample code is working But; Expression<Func<someClass, ???>> createSelector(string[] fields) { ... .... return ... } Expression<Func<someClass, ???>> selector = createSelector({"Name","Id"}); Is

问题 var questions = {"ques_id":"1","question":"<p><span class=\\\"math-tex\\\">\\\\(x = {-b \\\\pm \\\\sqrt{b^2-4ac} \\\\over 2a}\\\\)<\/span>   Test Question new with mathjax<\/p>","ques_type":"text_based_questions","correctAnswer":3,"choices":[{"option_id":"1","value":"Option A"},{"option_id":"2","value":"Option B"},{"option_id":"3","value":"Option C"},{"option_id":"4","value":"OPtion D"}]}; $('#test-question').html(questions.question); MathJax.Hub.Queue(["Typeset",MathJax.Hub, 'test-question']

问题 var questions = {"ques_id":"1","question":"<p><span class=\\\"math-tex\\\">\\\\(x = {-b \\\\pm \\\\sqrt{b^2-4ac} \\\\over 2a}\\\\)<\/span>   Test Question new with mathjax<\/p>","ques_type":"text_based_questions","correctAnswer":3,"choices":[{"option_id":"1","value":"Option A"},{"option_id":"2","value":"Option B"},{"option_id":"3","value":"Option C"},{"option_id":"4","value":"OPtion D"}]}; $('#test-question').html(questions.question); MathJax.Hub.Queue(["Typeset",MathJax.Hub, 'test-question']

问题 I have a div that contains 3 fields You can see the image here http://imgur.com/A3tbd.jpg I'm cloning this div with this plugin http://sroucheray.org/blog/demos/jquery-dynamic-form/ My problems are: It doesn't clone correctly datePicker. I'm using validate form plugin, but I guess this plugin is not prepared to validate cloned elements Is there any easy code, other plugin or some functions I should use for doing this sequence? Verify user has filled the 3 fields of the actual div If so, clone

问题 How do I dynamically resize the a label or button, in particular, the text_size and height, depending on the amount of text, at run-time? I am aware that this question has already been answered in one way with this question: Dynamically resizing a Label within a Scrollview? And I reflect that example in part of my code. The problem is dynamically resizing the labels and buttons at run-time. Using, for example: btn = Button(text_size=(self.width, self.height), text='blah blah') ...and so on,

问题 Let's say I have this: dynamic foo = new Foobar(); And I have this: public class Foobar : DynamicObject { } The question is, is it possible to override members of DynamicObject so that this code: string name = new Foobar().Name Does not throw an Exception at run-time? I want to return default for name 's if Name is not a member. Possible? What do I need to override? 回答1: Override TryGetMember (and TrySetMember). Classes derived from the DynamicObject class can override this method to specify