state

来源： https://stackoverflow.com/questions/62392631/how-do-i-update-a-react-state-from-previously-fetched-data

问题 Previously i was using Microsoft state service to maintain user state in my bot. Now that Microsoft has stopped supporting state service, i have written a static object to store user data as shown below. Just wanted to know is this a right approach to maintain user state because at once around 8000 user might be using the application. I am just worried if it will cause some concurrent. Please suggest if there is a better way to maintain user state in bot framework private static object

问题 I create a check button / box, with the following call x=ttk.Checkbutton(tab1,state='disabled',command = lambda j=i,x=k: fCheckButton(j,x)) x.state(['selected']) The box appears fine and is selected, but it appears on load up, with a black box in it, which seems to have nothing to do with the state of it. I have looked for reasons why, but can't actually find anyone with the same problem. thanks 回答1: I've had a similar issue on Windows 7. After loading the app, one of my checkbuttons

问题 This question already has answers here : Difference between WAIT and BLOCKED thread states (6 answers) Closed 2 years ago . I have read the answer through the following posting: Difference between WAIT and BLOCKED thread states However, I am still puzzled. I want to know what is the difference on the JVM level and what is the difference on the CPU level. Whether both of these have the "Thread Context switch"? , which is faster on a multithreaded environment? 回答1: Assuming that you asking the

问题 I need a bit of help. I am new to react, so I have stuck here. I have shared a sandbox box link. That Contains a Table. as below | Toy | Color Available | Cost Available | Now everything works perfectly. But I want to save the data of the table as below The detail state should contain a list of row values of the table and the columnsValues should contain the checkbox value of Color Available and Cost Available Example: this.state.detail like detail: [ { toy : ... color : ... cost : ... } {

问题 I have a list of results, and each time I click on a result, it calls my addFunc function to add that particular result's details as an object in the selectedData list. Currently, this works when I console.log my selectedData list. What I want to do is display my selectedData list, and each time a result is clicked, the object will be added to the list, and I want that to be reflected on my screen. I believe I have to use state to do this, but I am not very sure how to. Thank you for your

问题 I have a state called time @State var time = 0 and an ObservedObject called timerWrapper @ObservedObject var timerWrapper = TimerWrapper() time can be updated from a child view and I want to be also able to update it using the timerWrapper (theObservedObject), if I use this: self.time = self.timerWrapper.remainingSeconds and do this: Text($time) The text doesn’t update. It only works if I do this: Text(self.timerWrapper.remainingSeconds) I know that’s because when remainingSeconds is

问题 I'll preface this by stating that I'm a complete beginner at React.js I've created an example of a project I'm working on where I call an API in componentDidMount() and get an array of objects back, setting it in state. Here's what it looks like: class App extends React.Component { constructor(props) { super(props); this.state = { thing: [] }; } componentDidMount() { this.setState({ thing: [ { status: "running", test: "testing" } ] }); } render() { return ( <div> <h1 className="mt-5 mb-5">{

问题 I'll preface this by stating that I'm a complete beginner at React.js I've created an example of a project I'm working on where I call an API in componentDidMount() and get an array of objects back, setting it in state. Here's what it looks like: class App extends React.Component { constructor(props) { super(props); this.state = { thing: [] }; } componentDidMount() { this.setState({ thing: [ { status: "running", test: "testing" } ] }); } render() { return ( <div> <h1 className="mt-5 mb-5">{

问题 Below is my component class. The component never seems to execute componentWillUpdate(), even when I can see the state updating by logging before the return in mapStateToProps. The state is 100% changing, however the component doesn't refresh. import React, { Component } from 'react' import { connect } from 'react-redux' import { search } from './mapActions' import L from 'leaflet' class Map extends Component { componentDidMount() { L.Icon.Default.imagePath = './images' this.map = new L.Map(