state

问题 Clojure has a large number functions/macros for working with namespaces and java package imports. To my (limited) understanding the set up of namespaces can be considered state in a clojure process (repl). When working iteratively at a REPL session, especially when source files are (re)-loaded, I can find it easy to get confused - often when I make a mistake or syntax error in namespace configuration. Other times I want to try out refactoring namespaces/aliases/reference filters but can't

问题 I'm using $stateProvider for my route configuration. I wanted to take advantage of custom data they provide to pass some custom data from one partial page to the other (on ng-click ). This is the best I got so far: Attach Custom Data to State Objects You can attach custom data to the state object (we recommend using a data property to avoid conflicts). // Example shows an object-based state and a string-based state var contacts = { name: 'contacts', templateUrl: 'contacts.html', data: {

问题 I am new to AngularJS and would like to know how I change the State from within the Controller. For example, I typically change the state on a button click: <input type="submit" class="btn btn-lg btn-primary btn-block" value="Log In" ui-sref="main.navigation"/> So on Submit of the button, my page will change to the navigation page. This works fine, but what if I want to do some logic in my controller first, and then based off the results, I would want to change to a specific page. How do I do

问题 I'm trying to remove an item from my state array when clicked. At the moment I have an onclick listener which calls a function passed into the props. However I get a warning: bind(): React component methods may only be bound to the component instance. See App... and it does not remove the item. Thanks for any help regarding this issue! It has pretty much ground my progress to a halt. (function (React) { var data = [ 'Go to work', 'Play Albion Online', 'Keep learning React' ] var App = React

问题 I'm trying to create a simple login window with the very common 'Remember me' functionality. The login validation is done AJAX style, thus the browser won't remember my input. My approach is to use the built-in state functionality, but how to use it confuses me. Ext.state.Manager.setProvider(new Ext.state.CookieProvider({ expires: new Date(new Date().getTime()+(1000*60*60*24*7)), //7 days from now })); ... { xtype: 'textfield', fieldLabel: 'User name', id: 'txt-username', stateful: true,

问题 Haskell is a pure functional programming language. My question is: What are the advantages and disadvantages of using Haskell to solve problems involving lots of state, for example GUI programming or game programming? Also a secondary question: what methods are there to handle state in a functional way? Thanks in advance. 回答1: I'm going to answer your second question first. There are actually many ways to handle mutable state in Haskell (and other FP languages). First of all, Haskell does

问题 I am a student currently learning about Functional Reactive paradigm using F#. It's radically new viewpoint for me. Yesterday I learned about creating a simple ping-pong game using this paradigm. The idea I grasp so far is : we think values as functions of time. On its pure form, it's stateless. However, I need to remember the position of the ball (or state). So I always pass the current position of the ball as the parameter of the global function. If we talk about slight more complex games,

问题 So I started learning React a week ago and I inevitably got to the problem of state and how components are supposed to communicate with the rest of the app. I searched around and Redux seems to be the flavor of the month. I read through all the documentation and I think it's actually a pretty revolutionary idea. Here are my thoughts on it: State is generally agreed to be pretty evil and a large source of bugs in programming. Instead of scattering it all throughout your app Redux says why not

问题 I have a react-big-calendar (The parent container), I have also a select which, the events of the calendar are fetched according to this select ( doctor name ) and I have a button when I click on it, the dialog will be appears (another component), on this dialog, I have a form to add an event after the select, when I post my API, I save it on local storage, but the event added doesn't appears on my calendar just after refresh the page and reselect the doctor name. But I want, when I click on

问题 I'm making a primitive quiz app with 3 questions so far, all true or false. In my handleContinue method there is a call to push the users input from a radio form into the userAnswers array. It works fine for the first run of handleContinue , after that it throws an error: Uncaught TypeError: this.state.userAnswers.push is not a function(…) import React from "react" export default class Questions extends React.Component { constructor(props) { super(props) this.state = { questionNumber: 1,