state

Android Viewholder for ViewPager

由 ∥☆過路亽．° 提交于 2019-12-07 03:01:22
问题 Hello I am using a ViewPager but I would now like to retain states, instead of having cells regenerated. I notice viewpager is very similar to a custom adapter for listviews, and they function similarly where listview regenerate data in cells after they are no longer on screen, viewpager is the same way. Is there a way to do a viewholder, some kind of object that retains the state of each view, after it is loaded initially, so that the viewpager cells load quicker. (there is some processing

How to Better Iterate over State in Clojure (monad?)

由 情到浓时终转凉″ 提交于 2019-12-07 01:12:09
问题 I just wrote this code: (defn parameters [transform-factory state] (lazy-seq (let [[r1 state] (uniform state) [r2 state] (uniform state) [t state] (transform-factory state)] (cons [t [r1 r2]] (parameters transform-factory state))))) (defn repeated-transform [mosaic n transform-factory state] (reduce transform-square mosaic (take n (parameters transform-factory state)))) the parameters function generates a lazy sequence of values generated from the state , which are used to parameterise a

Why runState signature has only state argument?

由 痴心易碎 提交于 2019-12-07 00:58:41
问题 A real-life example: If I'm in a good mood('good state'), when manager asks me about estimates, I give him a solid answer, but dares he to do that 3 times in a row , without some free snacks in between, my mood changes(I get to 'bad state') and the next 3 times he approaches I ask him not to disturb me with any of his nonsense. Here's a log of my usual day: [ Mood: Good, Patience: 3 ] -- 11:00 am, I'm happy ESTIMATE -> "bla bla 6", [ Mood: Good, Patience: 2 ] ESTIMATE -> "bla bla 1", [ Mood:

Pass state from child to parent component in React Native

由 爱⌒轻易说出口 提交于 2019-12-06 23:58:32
问题 My app has a settings screen (child component) where you can change information about yourself and I'm trying to get that to render on my app's profile screen (parent component). So the profile screen displays your info and if you want to change any info you do it in settings. Right now any changes I make in the settings screen show up in Firebase but if I go back to the profile screen the changes in settings don't render. Of course if I close the app and reload it the changes will be there

Redirect state in angularjs

由 不羁岁月 提交于 2019-12-06 22:32:05
问题 This is the state configuration: angular .module('grabhutApp', [...]) .config(function ($stateProvider, $urlRouterProvider) { $stateProvider // ACCOUNT .state('account', { abstract: true, url: '/account', templateUrl: 'index.html' }) .state('account.main', { url: '', templateUrl: 'views/account/account.login.html', controller: 'AccountController' }) . . . // NO VIEWS .state('nv', { abstract: true, url: '/nv' }) .state('nv.logout', { url: '/logout' }) }); The nv and its sub states will have no

Flutter: Does it matter what code is in setState()?

由 删除回忆录丶 提交于 2019-12-06 19:31:49
问题 When we want a StatefulWidget to rebuild we call setState() but does it really matter if the code we type is inside that function or outside of it? Is this: class _ShoppingListState extends State<ShoppingList> { Set<Product> _shoppingCart = new Set<Product>(); void _handleCartChanged(Product product, bool inCart) { setState(() { if (inCart) _shoppingCart.add(product); else _shoppingCart.remove(product); }); } } the same as this: class _ShoppingListState extends State<ShoppingList> { Set

Atomic state storage in Python?

由 情到浓时终转凉″ 提交于 2019-12-06 16:56:57
问题 I'm working on a project on an unreliable system which I'm assuming can fail at any point. What I want to guarantee is that if I write_state and the machine fails mid-operation, a read_state will either read a valid state or no state at all. I've implemented something which I think will work below -- I'm interested in criticism of that or alternative solutions if anyone knows of one. My idea: import hashlib, cPickle, os def write_state(logname, state): state_string = cPickle.dumps(state,

Check angular ui route state using protractor

由 我的梦境 提交于 2019-12-06 14:13:32
I'm using protractor framework to test my angular application. Can I check for the angular state in the e2e test? alecxe Sure, the idea is to use browser.executeAsyncScript() to: locate the element having the ng-app defined initialize the angular.element and get the injector instance get the $state service use $state.current.name to get the current state's name Sample working test using the UI router demo page : describe("Current Angular UI router state", function () { beforeEach(function () { browser.get("https://angular-ui.github.io/ui-router/sample/#/"); }); it("should get the current state

xHow to save UISwitch state whenever the application is quit (Swift)

由 大憨熊 提交于 2019-12-06 11:26:43
How can I save the state of multiple switches so when the application is quit and reopened, all of the switches are not at the same state they where before I quit it. Here is my very simple code for a quick homework manager I did. // // ViewController.swift // HomeworkManager // // Created by Nate Parker on 9/2/14. // Copyright (c) 2014 Nathan Parker. All rights reserved. // import UIKit class ViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view, typically from a nib. } override func didReceiveMemoryWarning() {

TransactionScope and rolling back object state

由 左心房为你撑大大i 提交于 2019-12-06 11:26:09
问题 I'm looking for a solution to a design problem. This will take a bit of explaining. I would post code, but that woul make this even longer. I have a custom generic collection I use to hold Business Objects as needed. For easy of reference, call the business objects BO and the generic collection GC . Inside GC I have a private collection of those business objects that have been flagged for deletion. Call this private collection PDC . I can have an arbitrary number of GC's, each with their own
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