identity

问题 Is the identity function pre-defined in Scheme? 回答1: Yes, but it's called values. Actually, that's usually used for multiple values, so it's a generalized multiple-arity identity function. 回答2: In DrRacket I know that identity works. For example, (identity 12) => 12 来源： https://stackoverflow.com/questions/4969927/identity-function-in-scheme

问题 I am trying to code 3 echo servers running in promises, but I want to know which promise is doing the echoing. Is there a way to do that? no strict; for 0 .. 2 -> $index { @result[$index] = start { $myID = $index; say "======> $myID\n"; my $rsSocket = IO::Socket::INET.new: localhost => 'localhost', localport => 1234 + $index, listen => 1; while $rsSocket.accept -> $rsConnection { say "Promise $myID accepted connection"; while $rsConnection.recv -> $stuff { say "promise $myID Echoing $stuff";

问题 i have looked at the other similar questions, and while this one (Yii2 user identity loss after page redirection) asks pretty much the same question, there is no solution that applies to my situation. i have created a new identity class, i have implemented all the necessary methods and implemented the IdentityInterface. note that it does NOT extend ActiveRecord, but rather extends my own base Model class that does not derive from AR. everything seems to work fine, i can log in and be

问题 I have a data flow task that extracts data from one database and inserts into a SQL Server database. After each record is inserted in the master row I also need to insert rows into a detail table. The data for the detail table is pretty simple and can be calculated. How do I retrieve the value of the identity column after inserting? How can I produce the rows that must be inserted in the second table? Can I do this in a script? Do I need to use a Foreach loop at the control flow level which

问题 I use IIdentity interface For Getting current userid and username . so implement following Method: private static IIdentity GetIdentity() { if (HttpContext.Current != null && HttpContext.Current.User != null) { return HttpContext.Current.User.Identity; } return ClaimsPrincipal.Current != null ? ClaimsPrincipal.Current.Identity : null; } And Add this code: _.For<IIdentity>().Use(() => GetIdentity()); in my IoC Container [structuremap] . Usage this._identity.GetUserId(); this._identity

问题 I'm making a new (empty template) ASP.NET MVC 5 application and I cannot logoff of this app. My logoff Action: public ActionResult LogOff() { if (User.Identity.IsAuthenticated) { //break here } try { AuthenticationManager.SignOut(); if (User.Identity.IsAuthenticated || Request.IsAuthenticated) { //break here; } } return RedirectToAction("Login", "Account"); } Startup class: public partial class Startup { public void ConfigureAuth(IAppBuilder app) { app.UseCookieAuthentication(new

问题 While experimenting with different value types for Enum members, I discovered some odd behavior when the values are mutable. If I define the values of an Enum as different lists, the members still behave similarly to when the Enum values are typical immutable types like str or int , even though I can change the values of the members in place so that the values of the two Enum members are the same: >>> class Color(enum.Enum): black = [1,2] blue = [1,2,3] >>> Color.blue is Color.black False >>>

问题 While there's lots to like about DataObjects.NET, I've found help resources to be a lean, and can't find a solit example of using DataObjects.NET with RDBMS generated primary keys. It would seem as though D4O won't do inserts against SQL Server unless it's in controll of the key. Has anyone solved this in the wild? 回答1: There is no easy way to make DO4 use IDENTITY columns - mainly, because it is designed to rely on bulk key generation (aka HiLo algorithm). AFAIK, there are no good

问题 I was recently asked to fix something on a site which I haven't worked on before. I haven't really worked with jQuery that much, but I figured I'd take a look and see if I could fix it. I've managed to mostly clear up the problem, but I'm still horrified at the way they chose to build this site. On document load, they replace the click() method of every anchor tag and form element with the same massive function. When clicked, that function then checks if the tag has one of a few different

问题 I would like to only have one DbContext in my ASP.NET MVC project. How should I merge the default IdentityDbContext with my own code first DbContext? They are using the same database. public class ApplicationDbContext : IdentityDbContext<ApplicationUser> { public ApplicationDbContext() : base("SignalRChat") { } } This is the default one provided in the IdentityModel.cs class. Is it safe to do the following? And append my own DbSets? public class ApplicationDbContext : IdentityDbContext