reusability

问题 I'm learning the new Java 8 features, and while experimenting with streams ( java.util.stream.Stream ) and collectors, I realized that a stream can't be used twice. Is there any way to reuse it? 回答1: If you want to have the effect of reusing a stream, you might wrap the stream expression in a Supplier and call myStreamSupplier.get() whenever you want a fresh one. For example: Supplier<Stream<String>> sup = () -> someList.stream(); List<String> nonEmptyStrings = sup.get().filter(s -> !s

问题 I'm having a lot of difficulty resuming an SSL session on Android using HttpClient. I'm polling a server every 90 seconds (it's for industrial devices with one function only), so I need to resume the session or else data use skyrockets from a few kB an hour up to 150-200kB, which is unsustainable. The server is embedded Jetty in Restlet, and supports resumption of SSL sessions when I test it using OpenSSL as far as I can tell. I'm reusing my HttpClient object, so it's not that. Android has a

问题 these are all codes in my demo: import UIKit class TableViewController: UITableViewController { var numberOfCell = 0 @IBAction func addAction() { numberOfCell = numberOfCell + 1 tableView.reloadData() } override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return numberOfCell + 1 } override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { if indexPath.section == 0 { if indexPath.row == 0 { let cell =

问题 I'm inside a function that repaints certain controls inside a form, it is implemented as an extension method for the ControlCollection class like this: void SetColorsCorrespondingToVisualStudioTheme(this Control.ControlCollection controls) { foreach (var control in controls) { ... Inside this method, the code that sets some GUI properties that are common to a set of controls: ... if (controlType == typeof(TreeView)) { ((TreeView)control).BorderStyle = BorderStyle.None; ((TreeView)control)

问题 Aim To implement a proper and efficient view architecture for my project (with maximum reuse of repeated units) About my project My project involves classes taken by tutors and packs published by tutors. No framework has been used but object orientation and class hierarchies are present for model, controller part. I have the following modules - Search->Class listings - list of classes displayed in search results. Student room->Class listings - List of classes a student has purchased Search-

问题 I don't know if this is possible but it sounds like something that should be. What i want to do is, to create UIViews (or UIViewControllers not really sure how it would work) in Interface Builder say... 10 of them, and use them according to what the user choose to. For example in state A i wanna show him widgets 1,2 and 3; in state B widgets 3,5 and 7 etc. EDIT: what i mean by state, is that according to what the user chose in the previous steps, they all lead to the same UIViewController but

问题 What is the correct way of overriding color resources defined in WPF Controls Library project? Say I have project A that is a WPF Controls Library having the following two color resources defined: <Color x:Key="Color1">WhiteSmoke</Color> <Color x:Key="Color2">LightGray</Color> and a Brush created from these colors: <LinearGradientBrush x:Key="{ComponentResourceKey {x:Type local:MyControl}, MyControlBackground}"> <GradientStop Offset="0" Color="{StaticResource Color1}" /> <GradientStop Offset=

问题 I would like to make use of few methods from couple of my old tested classes into my new class that I am building. Unfortunately, C# does not support multiple inheritance. How do I reuse code from these old classes? Do I just create them as member objects? or Do I have any other options? 回答1: Generally, using composition instead of inheritance is the way forward, yes. If you could give a concrete example of the kind of thing you mean, that would make it easier to help find the appropriate

问题 I frequently write throwaway code (in a research environment) - for example to explore an algorithm or a model for a scientific property or process. Many of these "experiments" are one-off but sometimes I find that I need to use a few later. For example I have just unearthed code for string matching I wrote 7 years ago (stopped because of other priorities) but which is now valuable for a coworker's project. Having looked at it (did I really write such impenetrable code?) I realise there are

问题 I am new to AutoHotkey and have no programming experience, so sorry to ask what to many of you may be a very mundane question. One of my main uses for AutoHotkey will be to complete data in records I keep from an AutoHotkey ListBox. Using replies to other forum questions I have a working script as follows: :*:\lb:: Gui, Add, ListBox, h100 vLB, apple||bannana|cantaloup|kiwi|orange|pomegranate|strawberry Gui, Add, Button, Default, Input Gui, Show return ButtonInput: Gui, Submit SendInput, %LB%