A constraint is a condition that has to be fulfilled in a given context. Constraints are typically used in databases and programming languages to detect errors, ensure data consistency, accuracy, and to enforce business requirements.

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Cplex opl run doesn't answer when I add easy code

I have a small project with CPLEX OPL. In my model, I have almost 40 constraints. It works properly and gives me objective function value as 90. Objective function is: maximize sum(k in konteyner, ...
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Swift animate UITableViewCell expanding height constraint [duplicate]

I have a TableView with a static cell inside which I would like to expand when a button has been pressed. There is a container view inside the cell, the constraints have been set up correctly but I am ...
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31 views

How to get iOS app to work on all iPhones? (Constraints)

I am fairly new to developing for iOS. I have a fully functioning program written in Swift and the UI was created in the scene builder on Xcode. I created an app for my work to simplify closing out ...
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23 views

Different looks of view in design and emulator

I am new in Android development.I was wondering, if you could help me.I want to create a GUI for a button pad in a fragment and use the constraint layout.The view looks good in designscreen and ...
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7 views

can you access constraint values on your 3d model in three.js?

Can you control your constraint values on your 3d model in three.js? Can you access a control nurb( or it's values) that is parented to your model in three.js? If so, Can I keep the nurbs( if not a ...
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28 views

Scipy Optimization: Conditional Constrains (two intervals for 1 variable)

I came across: conditional constraint in optimizationIt was close, but not clear enough for me to translate to my specific use case.What I need (constraint wise):if x < M:then x=0...
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27 views

Gurobi model optimal but constraints violated

I'm writing an extension of the Vehicle Routing Problem (VRP) in JAVA by using Gurobi. The problem that I have, is that when I run my code, JAVA says that it is optimal with an objective value of zero....
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23 views

How to make a Many2One constraint in odoo 10

Good day, i'm working with Odoo 10, and i'm trying to modify the fleet module like the next imageWe need the field "Conductor" (Driver) be unique, i mean, a vehicle only can have assigned one driver ...
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53 views

Best way to store parameter that changes over the course of time

Consider the following scenario: We have a function (let's call it service_cost) that performs some sort of computations.In that computations we also use a variable (say current_fee) witch has a ...
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22 views

iOS Update Interface Builder view frame based on constraints

I've been experiencing this issue for a long time and I am not sure if there is a solution but let's see what StackOverflow's community thinks about.I am building my views in Interface Builder and I ...
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How to reposition an UITextField to a specific position with Auto Layout

I am creating a view on swift 4.0 for IOS. I have 5 UITextField like on my example. I want to change the position of "tf5" and place it between "tf2" and "tf3" but i can't use margin top on Auto ...
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30 views

Regex validation with @Pattern annotation in spring data

I need password validation (for example a password must contain at least 4 chars, max 8 and min 1 numeric digit).I have model (of course with getters and setters):@Entitypublic class User ...
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28 views

Constraints on object with variable height and width

Image of my ViewController: ViewControllerHey stackoverflow users,i created an Design for my Application based on the Iphone SE.But on the iphone 8 or some other iphone model, i want my UIView ...
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10 views

Focus can not move to tableview after changing constraint in tvOS?

Platform: Apple TV 4, tvOS 10.1.1I have a UITableView in the left side of view controller, a focusable scroll view in top right area, and a UITableView in bottom right area, as below:┌─────────────...
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15 views

Position buttons to bottom on constraint layout

I am trying to position two buttons to the bottom of a constraint layout. In the Design view in Android Studio, everything looks OK, but when I run the app in debug, the buttons look like they are ...

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