I have a UITextField that I want to enlarge its width when tapped on. I set up the constraints and made sure the constraint on the left has the lower priority then the one that I am trying to animate on the right side. Here is the code that I am trying to use. // … Read more
I’m using Entity Framework 5.0 Code First; public class Entity { [Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)] public string EntityId { get; set;} public int FirstColumn { get; set;} public int SecondColumn { get; set;} } I want to make the combination between FirstColumn and SecondColumn as unique. Example: Id FirstColumn SecondColumn 1 1 1 = OK 2 2 … Read more
I want to remove constraints from my table. My query is: ALTER TABLE `tbl_magazine_issue` DROP CONSTRAINT `FK_tbl_magazine_issue_mst_users` But I got an error: #1064 – You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘constraint FK_tbl_magazine_issue_mst_users‘ at line 1 11 … Read more
Here’s the scenario: I’ve written some code with a type signature and GHC complains could not deduce x ~ y for some x and y. You can usually throw GHC a bone and simply add the isomorphism to the function constraints, but this is a bad idea for several reasons: It does not emphasize understanding … Read more
Can anyone tell me if there is a way with generics to limit a generic type argument T to only: Int16 Int32 Int64 UInt16 UInt32 UInt64 I’m aware of the where keyword, but can’t find an interface for only these types, Something like: static bool IntegerFunction<T>(T value) where T : INumeric 24 Answers 24
Why doesn’t a TRUNCATE on mygroup work? Even though I have ON DELETE CASCADE SET I get: ERROR 1701 (42000): Cannot truncate a table referenced in a foreign key constraint (mytest.instance, CONSTRAINT instance_ibfk_1 FOREIGN KEY (GroupID) REFERENCES mytest.mygroup (ID)) drop database mytest; create database mytest; use mytest; CREATE TABLE mygroup ( ID INT NOT NULL … Read more
Are disabling and enabling foreign key constraints supported in SQL Server? Or is my only option to drop and then re-create the constraints? 17 s 17 If you want to disable all constraints in the database just run this code: — disable all constraints EXEC sp_MSforeachtable “ALTER TABLE ? NOCHECK CONSTRAINT all” To switch them … Read more
