declarative Questions

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I would like to use autoload to use an existings database. I know how to do it without declarative syntax (model/_init_.py): def init_model(engine): """Call me before using any of the tables or c...
Uttermost asked 24/12, 2010 at 13:2

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I'm not very good in understanding the difference between the imperative and declarative programming paradigms. I read about Haskell being a declarative language. To an extend I would says yes but ...
Authority asked 19/10, 2016 at 11:20

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My professor gave this as an example of Prolog. It is a program that solves the Tower of Hanoi puzzle, where you have to move a stack of disks to another peg by moving one disk after the other, wit...
Coy asked 28/5, 2016 at 13:17

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I've got a class: class Tag(Base, TimestampMixin): """Tags""" __tablename__ = 'tags' __table_args__ = {'mysql_engine' : 'InnoDB', 'mysql_charset' : 'utf8' } id = ...
Marsala asked 28/3, 2012 at 16:4

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Problem In Order to achieve a clean look and feel of the App's code, I create ViewModels for every View that contains logic. A normal ViewModel looks a bit like this: class SomeViewModel: Observ...
Outspan asked 8/5, 2020 at 10:15

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Suppose the correct definition of a predicate would be len([],0). len([_|T],N) :- len(T,X), N is X+1. However, we end up with the following erroneous definition in stead. len2([],0). len2([_|T],N...
Febrifacient asked 1/7, 2021 at 19:11

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I am trying to set up a matrix build and am running in several issues. The matrix looks like: stage( 'BuildAll' ) { matrix { axes { axis { name 'PLATFORM' values 'win32vc9', 'win32vc19' } ...
Mazda asked 12/3, 2020 at 12:51

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To create the User table I have to use drop_all and then create_all methods. But these two functions re-initiate an entire database. I wonder if there is a way to create the User table without eras...
Transistor asked 22/7, 2017 at 22:21

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I am trying to implement Navigator 2.0 method. The only thing I can't make to work is the back button presses. When I press the back button, the app just exits and not going to the previous page. I...
Fisher asked 31/10, 2020 at 2:36

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What I'm looking for is a basic operation (Which I'm sure have a name I'm just unaware of atm). I have a matrix like: {1,2,3} {A,N,F} {7,8,9} which I'd like to mutate into {1,A,7} {2,N,8} {3...
Beka asked 18/2, 2011 at 9:31

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I need to check in Haskell if a four digit number is a palindrome, the problem is that I can't use lists, and in spite of having a fixed digit number, I should use recursion. I have been think on t...
Womenfolk asked 11/10, 2014 at 14:52

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I'm thinking about developing a system to perform highly parallel queries on nested (but tree-like) data. The potential users are data analysts (physicists, specifically), not programmers. For the ...
Attested asked 8/8, 2016 at 14:33

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So maybe I'm misunderstanding how SwiftUI works, but I've been trying to do this for over an hour and still can't figure it out. struct ContentView: View, AKMIDIListener { @State var keyOn: Bool ...
Truth asked 17/12, 2019 at 7:9

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How can functions be named to clearly reflect that they follow a declarative paradigm? Context: I've recently started working on creating libraries that work in a declarative manner but I'm havin...
Cusick asked 23/10, 2019 at 0:32

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I am building an api which can return children of resources if the user requests it. For example, user has messages. I want the query to be able to limit the number of message objects that are retu...
Axillary asked 1/5, 2017 at 22:11

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I have a scripted pipeline that I want to port to declarative form. I used to have // Stages used in developement after each single commit stage('Build') { } stage('Unit Tests') {} // Other stage...
Leaven asked 20/5, 2019 at 15:30

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I have a standardized declarative Jenkinsfile used in many projects. I have moved the entire pipeline into a library, so my Jenkinsfile looks like this: @Library('default_jenkins_libs') _ default_...
Geraldgeralda asked 10/2, 2018 at 18:35

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Could someone please advise what the "correct" method is for adding HTML content to an ASP.NET page dynamically? I am aware of the following declarative method. //Declaration <%= MyMethodCall(...
Thornton asked 1/4, 2011 at 2:53

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I have a requirement to allow patch branch too with master branch (we use git). stages { stage('PR Build') { when { beforeAgent true expression { isMaster = env.BRANCH_NAME == masterBranchNam...
Torbert asked 26/9, 2018 at 8:34

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I created a pod with kubectl create -f pod.xml and kubectl apply -f pod.xml using the below yaml and I don't see any difference, a pod gets created with both the commands. The K8S document, mention...
Mane asked 25/9, 2018 at 14:19

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I read a brief article about Prolog and Logic Programming. I'm curious if Logic Programs can do algebra. Like would you be able to ask what the Variable of X is in the equation 5+X = 7 and get an a...
Sumikosumma asked 3/12, 2012 at 19:19

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I am wondering whether there exists any declarative language for arbitrarily describing the format and semantics of a data structure, that can be compiled to a specific implementation of that struc...
Encroachment asked 3/4, 2010 at 3:20

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How can this function return true? foldr (||) False [True,undefined] => True The first fold looks like this: undefined || True , which should return an error So im guessing haskell giv...

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i would like to use a jenkins environment variable inside a power shell script.Here ${destination} is coming as null inside powershell script.Not able to identify what is the mistake i am doing.Ple...
Koonce asked 26/5, 2018 at 21:43

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setuptools 30.3.0 introduced declarative package config, allowing us to put most of the options we used to pass directly to setuptools.setup in setup.cfg files. For example, given following setup.c...
Djerba asked 13/4, 2018 at 15:18

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