constraints

问题 Hello I have a UITableView with x# of cells. the last cell I have two UILabels. When the second UILabel text is set I am trying to get the cell and the UILabel to resize to show the text. Here is what I have: The UILabel - LabelBio (orange) has: Lines: 0 Baseline: Align Baselines Line Break: Word Wrap Autoshrink: Fixed Font Size The constraints for ContentView, LabelSellerInfo and LabelBio are set as follows: LabelSellerInfo LabelBio ContentView With those settings here is what a get: I have

问题 Bottom Line Up Front Is there a succinct way that I can constrain the number of child entities that can belong to a parent in Entity Framework. I am using 4.3.1 at the moment. The Problem I am developing an ASP.NET MVC3 site which accesses data via a data access layer that uses Entity Framework. I have a SearchList entity which has a many to many relationship to a Search entity. A SearchList may have many Searches, and a Search may belong to many SearchLists. At one point in the workflow of

问题 (NOTE: Split from Shapeless: Trying to restrict HList elements by their type ) Question 2 - Own Constraint using Coproduct What I really wanted to do is to write a new constraint using Coproduct. trait CPConstraint[L <: HList, CP <: Coproduct] extends Serializable object CPConstraint { import shapeless.ops.coproduct.Selector._ def apply[L <: HList, CP <: Coproduct](implicit cpc: CPConstraint[L, CP]): CPConstraint[L, CP] = cpc type <*<[CP <: Coproduct] = { // TODO: just invented a symbol ...

问题 Currently I am working on a game for people with accessibility restrictions. I am having the issue of locking the player model in a sitting position. If the user does not center themselves in the room the player model will be pulled to a certain direction. I would like to lock the player model in a seat and only allow for arm movements and head rotations, no leaning or moving in the game using the HMD. Since I am using the Final VR IK asset I have tried using their demo for sitting position

问题 The situation: drawing a stack of playing cards, like in the Solitaire game. Nicely stacked. To achieve this, I'm using a JLayeredPane in combination with a custom implementation of the LayoutManager interface. The reason for using a custom LayoutManager is that the stack orientation varies, sometimes the playing cards cover each other completely, sometimes partially, and this logic seems to be a good job for a LayoutManager, because this basically boils down to setting the location of the

问题 I have a simple (indeed standard in economics) nonlinear constrained discrete maximisation problem to solve in R and am having trouble. I found solutions for parts of the problem (nonlinear maximisation; discrete maximisation) but not for the union of all the problems. Here is the problem. A consumer wants to buy three products (ananas, banana, cookie), knows the prices and has a budget of 20€. He likes variety (i.e., he wants to have all three products if possible) and his satisfaction is

问题 I have a method, that should accepts any object, as long as all its fields are strings or numbers I made this, which works great with duck typing static interpolateParams( route: string, params: {[key: string] : string | number}) : string { const parts = route .split("/") .map(part => { const match = part.match(/:([a-zA-Z09]*)\??/); if (match) { if (!params[match[1]]) { console.error("route argument was not provided", route, match[1]); return part; } return params[match[1]]; } else { return

问题 I have a USER table in database. The table has a RegistrationDate column which has a default constraint as GETDATE(). When using LINQ, I don't provide any data for RegistrationDate column to make it default. But SQL Server raises error. I think LINQ tries to insert NULL into the column. How can I make LINQ not to try to insert in the column RegistrationDate, because it has default value? 回答1: Set Auto Generated Value property to true in the designer. Or IsDbGenerated="true" in .dbml file. 回答2

问题 I've a PK constraint - a clustered index on two columns - which I am in the process of dropping. The command is still running after an hour. I would have thought that as I am just removing a constraint the operation would be nearly instantaneous. Can someone explain to me what is actually happening under the hood when I drop the PK? 回答1: Clustered index is not "just a constraint", it's a storage method. When you drop it, your data are being reordered from clustered storage to heap storage

问题 How can we add a constraint which enforces a column to have only positive values. Tried the following mysql statement but it doesn't work create table test ( test_column integer CONSTRAINT blah > 0); 回答1: You would use the keyword unsigned to signify that the integer doesn't allow a "sign" (i.e. - it can only be positive): CREATE TABLE test ( test_column int(11) unsigned ); You can read more about the numeric data types (signed & unsigned) here. As far as an actual constraint to prevent the