command

I'm developing WPF applications and I want to reuse my classes that are the same in all those applications so I can add them as a reference. In my case I have a class for my Commands: public class RelayCommand : ICommand { #region Fields readonly Action<object> _execute; readonly Predicate<object> _canExecute; #endregion // Fields #region Constructors public RelayCommand(Action<object> execute) : this(execute, null) { } public RelayCommand(Action<object> execute, Predicate<object> canExecute) { if (execute == null) throw new ArgumentNullException("execute"); _execute = execute; _canExecute =

How to decouple a Mode (normally expressed by enums) from its implementation in commands and their relationship? Is their a good pattern describing the loose binding between a mode switch (int, enum, string, ...) and its command calls? I want to add modes via config, so this must be (dynamically) easy extendable (without programming). I already know the command pattern (ICommand in C#/.Net). It could be an Dictionary of Commands and their related mode number, but what about the switching logic? It is possible to decouple context (switching descission, parameters) from the strategy to solve the

I've seen it many times but never understood what the as command does in Python 3.x. Can you explain it in plain English? It's not a command per se, it's a keyword used as part of the with statement : with open("myfile.txt") as f: text = f.read() The object after as gets assigned the result of the expression handled by the with context manager. Another use is to rename an imported module: import numpy as np so you can use the name np instead of numpy from now on. The third use is to give you access to an Exception object: try: f = open("foo") except IOError as exc: # Now you can access the

I'm attempting to write a program that will display and be able to update your IP address settings using a JFrame window. I am looking at running this purely on windows so I'm attempting to be able to use the netsh windows command to retrieve/set details. The windows command: netsh interface ip show config name="Local Area Connection" | Find "IP" returns exactly what I want it to, however the code I have written will not work past the pipe, it will only work if I write up to the "Local Area Connection" part. Is there any way of using the pipe feature to be able to return specifically just the

I'm trying to create a program allowing me to execute a command through a terminal (which is OmxPlayer for raspberry pi if you want to know) with arguments, but i'd want to be able to interact with it once I have launched the command. For example i'd want to do : omxplayer -win x1 y1 x2 y2 and then be able to press "p" to pause the video/audio media I already have something that can launch the omxplayer with arguments (actually it's "ls" but it should work exactly the same way) but I don't understand how to interact with the terminal once i've launched the command through the processBuilder.

The ListBox control does not implement a Command property. I have to attach some functionality to the SelectionChanged event. Somebody knows how can I do it? Please help me I prefer using a binding to the SelectedItem and implementing any functionality in the setting of the binding property. <ListBox ItemsSource="{Binding Items}" SelectedItem="{Binding SelectedItem}" /> ... public class ViewModel { public IEnumerable<Item> Items { get; set; } private Item selectedItem; public Item SelectedItem { get { return selectedItem; } set { if (selectedItem == value) return; selectedItem = value; // Do