instance

php Set a anonymous function in an instance

由 青春壹個敷衍的年華 提交于 2019-12-09 16:43:29
问题 I am just starting out with PHP, and I am wondering if there is a way to add an anonymous function to a class instance. For instance, lets say... class A{ public B; } $c = new A(); //This is where I am getting a little confused... //The following wont work $c->B = function(){echo('HelloWorld');}; $c->B(); What I am hoping to do is reuse the same spit of code in a great number of different applications, and make it so that I can just 'swap-out' and replace functions in specific instances. I am

Restarting a game and reinstantiate objects

由 荒凉一梦 提交于 2019-12-09 03:41:13
问题 Introduction I am creating a small game in C++ and would like to create a function to restart the game. First I am creating the object player . Then I have an if statement to determine when a certain key is pressed to call the New() method. My goal In that method I would like to reinstantiate an object of the Player class, so all variables will be resetted. My code: Player player; //New game method Game::New() { player = new Player(); } //Game loop Game::Loop() { if(keyispressed(key)) { Game

Global instances of class

由 好久不见. 提交于 2019-12-09 00:18:09
问题 Still trying to get to know C# (Mostly worked with C). I have a class "Device" and would like to create an instance of the class, but would also like access to the instances globally because I use them so much in my GUI methods. public class Device { public string Name; public List<string> models = new List<string>(); public List<string> revisions = new List<string>(); ... } Somehow declare this globally: Device Device1 = new Device(); Device1.Name = "Device1"; Then access it later in a WPF

How to avoid multiple instances of a program?

由 ≯℡__Kan透↙ 提交于 2019-12-08 23:47:26
问题 I need to find a right way to prevent two running instances of my (Python) program. I am currently using the following method. On Windows, os.popen('wmic process get caption,processid | findstr `programname.exe`') On Linux, os.popen('ps x | grep `programname`') It seems to work fine for now. Is this method correct? Can someone suggest to me a better way? edit: Thanks for the reply guys, Is anything wrong with the above methods? I tried the pid file way for linux. What if the pid file gets

Inheriting from instance in Python

由 随声附和 提交于 2019-12-08 23:45:07
问题 In Python, I would like to construct an instance of the Child's class directly from an instance of the Parent class. For example: A = Parent(x, y, z) B = Child(A) This is a hack that I thought might work: class Parent(object): def __init__(self, x, y, z): print "INITILIZING PARENT" self.x = x self.y = y self.z = z class Child(Parent): def __new__(cls, *args, **kwds): print "NEW'ING CHILD" if len(args) == 1 and str(type(args[0])) == "<class '__main__.Parent'>": new_args = [] new_args.extend(

VB.NET: Get class name of a instance

由 爷，独闯天下 提交于 2019-12-08 14:32:15
问题 Is there a way to get the instance's class name with VB.NET? 回答1: Dim type As Type = yourObject.GetType() Dim typeName As String = type.FullName Full name will get you the fully qualified name of the Type, including the namespace of the Type. See MSDN for more information on what is available with Type . 回答2: Try the following Dim name = Me.GetType().Name Or for any instance Dim name = theObject.GetType().Name 回答3: This could be better when you are using asp.net website class not object. Dim

Heroku - keeping a dyno alive (May 2013)

由 我是研究僧i 提交于 2019-12-08 13:55:27
Until now I used for this task the service called Pingdom, but yesterday I tried to sign up for a new application, but there is not the free plan anymore? Anyway, I took a look for an alternative and I found New Relic could do this as well, but there is (in my eyes) one issue - we can set up an URL which we would like to ping, but this URL is pinged periodically each 30 seconds (and each 15 seconds if was detected an error). Cannot this approach "overload" my app? There is also a way to set up the URL for pinging on an another page, for example not for index, but for app.com/ping_url.html But

GC.KeepAlive() when this is uncommented, still there is only one instance, how ?

由 大城市里の小女人 提交于 2019-12-08 12:13:27
问题 On against to the reference thread below, even if I comment the GC.KeepAlive() there is no difference I find and it blocks the creation of any other instance. Why is it the author explicitly mentioned its important line ? Ensuring only one application instance 回答1: If you don't do this the mutex will be destroyed on garbage collection but this isn't a guaranteed event to happen instantly that's why it can still work for a long time. I would have used a static my self see the second answer.

Scrolling two rich text boxes together, I can't figure it out

由 梦想与她 提交于 2019-12-08 11:44:27
问题 I want to scroll timeBox up when I scroll chatBox up. (Not necessarily vice-versa) I found the following code to do so: /// Subclass RichTextBox to add the capability to bind scrolling for multiple RichTextBoxs. /// This is useful for 'parallel' RTBs that require synchronized scrolling. /// Taken from https://gist.github.com/593809 /// Added WM_HSCROLL /// Added BindScroll() to form a two-way linkage between RichTextBoxes. /// Example usage showing how to bind 3 RichTextBoxes together: ///

Is there anything wrong with importing a python module into a routine or class definition? [duplicate]

由 有些话、适合烂在心里 提交于 2019-12-08 08:13:08
问题 This question already has answers here : Closed 8 years ago . Possible Duplicate: Should Python import statements always be at the top of a module? I recently answered a SO question and provided this routine as a solution: def set_fontsize(fig,fontsize): import matplotlib """ For each text object of a figure fig, set the font size to fontsize """ if not isinstance(fig,matplotlib.figure.Figure): raise Exception("fig is not a matplotlib.figure.Figure") for textobj in fig.findobj(match
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