declarative

问题 In WPF you can create a DataTemplate, put it in a ResourceDictionary, assign it a Type and then bind data of that type to a ContentControl and the DataTemplate will be used to render. as in this example: How do I use the DataType property on a WPF DataTemplate? the Xamarin.Forms enterprise apps ebook hints at such an ability but does not show any example: https://developer.xamarin.com/guides/xamarin-forms/enterprise-application-patterns/mvvm/#Creating_a_View_Defined_as_a_Data_Template Can

问题 I have a table Users and a table Friends which maps users to other users as each user can have many friends. This relation is obviously symmetric: if user A is a friend of user B then user B is also a friend of user A, I only store this relation once. The Friends table has additional fields besides the two User ID's so I have to use an association object. I am trying to define this relationship in declarative style in the Users class (which extends the declarative base), but I can't seem to

来源： https://stackoverflow.com/questions/56059004/what-can-cause-difference-in-timestamps-between-console-view-and-blueocean-view

来源： https://stackoverflow.com/questions/56059004/what-can-cause-difference-in-timestamps-between-console-view-and-blueocean-view

问题 I was wondering if there is a way in DLV for creating a list with the elements of all predicates that are true in a rule. For example, if I have the following predicates foo(a, b). foo(a, c). foo(a, e). foo(b, c). The result I am looking for should be new predicates where the first element is the first parameter of foo and the second parameter should contain a list with all the elements associated to the first parameter. Empirically: bar(a, [b,c,e]). bar(b, [c]). I know there is a way of

问题 I am trying to do this: <asp:HyperLink NavigateUrl='<%= WebContext.RootUrl %><%= WebContext.CurrentUser.UserName %>' runat="server" Text='<%= GetProfileImage(WebContext.CurrentUser.AccountId) %>'></asp:HyperLink> But am getting the error: this is not scriptlet. will output as plain text. when I mouse over my declarative statements. Any ideas? Thanks. 回答1: You can use data binding syntax <%# %> . Just be sure that your hyperlink is either in a databound control, such as a ListView item

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 4 years ago . I keep hearing this term tossed around in several different contexts. What is it? 回答1: Declarative programming is when you write your code in such a way that it describes what you want to do, and not how you want to do it. It is left up to the compiler to figure out the how.

问题 I've created a QML UI that has a dial and a custom control. The custom control is basically a progress bar with a MouseArea to allow the user to set the value by clicking it. As Qt's property binding docs point out, as soon as I assign to the custom control's value from Javascript in the MouseArea click handler, I lose the declarative binding between it and the dial. Is it possible to make this binding bidirectional, or even better, to link the values of both controls to a single value above

问题 I've created a QML UI that has a dial and a custom control. The custom control is basically a progress bar with a MouseArea to allow the user to set the value by clicking it. As Qt's property binding docs point out, as soon as I assign to the custom control's value from Javascript in the MouseArea click handler, I lose the declarative binding between it and the dial. Is it possible to make this binding bidirectional, or even better, to link the values of both controls to a single value above

问题 In ASP (Answer Set Programming), programs are written in a higher-level declarative language and then grounded in a deterministic way to generate an ASP instance using a grounder like lparse or gringo. Are there popular grounders the SAT community uses for generating instances? In other words, is there something that could take an expression such as: vertex(a; b; c). isRed(V) \/ isBlue (V) \/ isGreen(V) :- vertex(V). and generate a DIMACS file from it? In general, how are SAT competition