state

Recently some co-workers and I were having a discussion as to whether or not AngularJS services should have state or not. We came up with some arguments for and against it and I wanted to get additional thoughts and feedback on the subject. In my searching I found this but there doesn't seem to be any clear best-practice mentioned. In the none client-side world a service should never hold state, but I am starting to think that it might be acceptable client-side because its a different problem. Reasons for services holding state: The service isn't going to be accessed by multiple threads. Each

I am just trying to map nested values inside of a state object. The data structure looks like so: I want to map each milestone name and then all tasks inside of that milestone. Right now I am trying to do so with nested map functions but I am not sure if I can do this. The render method looks like so: render() { return( <div> {Object.keys(this.state.dataGoal).map( key => { return <div key={key}>> <header className="header"> <h1>{this.state.dataGoal[key].name}</h1> </header> <Wave /> <main className="content"> <p>{this.state.dataGoal[key].description}</p> {Object.keys(this.state.dataGoal[key]

I have a react element that has an inline style like this: (Shortened version) <div className='progress-bar' role='progressbar' style={{width: '30%'}}> </div> I want to replace the width with a property from my state, although I'm not quite sure how to do it. I tried: <div className='progress-bar' role='progressbar' style={{{width: this.state.percentage}}}> </div> Is this even possible? You can do it like this style={ { width: `${ this.state.percentage }%` } } Example yes its possible check below class App extends React.Component { constructor(props){ super(props) this.state = { width:30; /

All I am trying to accomplish is to be able to have an unordered list of links in which one is clicked, the parent list item is assigned the class "active." Once another link is clicked within that list, it checked to see if "active" is assigned, remove it from that list item, and add it to the most recent clicked links parent list item. Example: Step One - User has clicked the link "I am link two" <ul> <li><a href="#">I am link one</a></li> <li class="active"><a href="#">I am link two</a></li> </ul> Step Two - User has now clicked the link "I am link one" <ul> <li class="active"><a href="#">I

Is there any way in Oracle to determine whether a package has state or is stateless? I'm not aware of any view in the data dictionary that contains that information. The "ORA-04068: existing state of packages string has been discarded" error is rather annoying. It can be eliminated by removing package variables from the package. 11g introduced the feature that a package with variables that are all compile-time constants will be treated as stateless. I could have two sessions and compile the package in one and call it in the other and see if it throws an exception, but that requires calling a

I've been working through in Structure and Interpretation of Computer Programs and completing the exercises in Haskell. The first two chapters were fine (code at github ) but Chapter 3 is making me think harder. It starts by talking about managing state, with the example of a bank account. They define a function make-withdraw by (define (make-withdraw balance) (lambda (amount) (if (>= balance amount) (begin (set! balance (- balance amount)) balance) "Insufficient funds"))) so that you can execute the following code: (define w1 (make-withdraw 100)) (define w2 (make-withdraw 100)) (w1 50) 50 (w2