extend

问题 Background I have a function that takes a config object as an argument. Within the function, I also have default object. Each of those objects contains properties that essentially work as settings for the rest of the code within the function. In order to prevent having to specify all of the settings within the config object, I use jQuery's extend method to fill in a new object, settings with any default values from the default object if they weren't specified in the config object: var config

问题 module M def f=(x) @f= x end def f @f end end class A extend M end class B < A end A.f= 42 puts A.f puts B.f this produces 42 nil Is @f a class variable to A and B? How do I share a variable between A and B by only writing this into M? 回答1: By not using @@f directly, but rather class_variable_set() and class_variable_get(), class variables of A, B and C can be used from within M. module M def f=(x) class_variable_set("@@f", x) end def f class_variable_get("@@f") end end class A extend M end

问题 after reading this tweet from Ivan Chepurnyi and having to add a step to the OnePage Checkout (aka OPC) for a client's site, I thaught it was the perfect occasion to learn something new. I am a big fan of events/observers and try to use them as much as possible, but precisely for the OPC so far I found that it was not very elegant to use them. I mean, there are no useful events (as far as I know) that can be used. For example, from the top of my head I think of 2 things that I have to change

问题 I would like to extend the curses built-in window class that is created by calling curses.newwin() . However, I am hard-pressed to find out the actual name of that class that should replace the ¿newwin? placeholder below. #!/usr/bin/python3 import curses class Window(curses.¿newwin?): def __init__(self, title, h, w, y, x): super().__init__(h, w, y, x) self.box() self.hline(2, 1, curses.ACS_HLINE, w-2) self.addstr(1, 2, title) self.refresh() def main(screen): top_win = Window('Top window', 6,

问题 I have installed SonarQube™ and the PHP Plugin. I want to add a new CodeSniffer rule, like it's indicated in http://docs.codehaus.org/display/SONAR/PHP+Custom+Coding+Rules. However, I can't find the location of the "Standard" repository wich contains existing rules (PEAR, Squiz, Generic...). So I don't know where I have to add my new file corresponding to the xml rule I have defined in the sonar settings. Maybe I've missed something but I looked in every folder in the PHP plugin and didn't

问题 i'm having this simple plugin code: (function ($) { $.fn.tWeb = function () { var me = this; me.var1 = "foo"; this.done = function() { return this; } return this.done(); }; })(jQuery); var web = new jQuery.fn.tWeb(); alert(web.var1); works nice - alert(web.var1) is giving me "foo". my question: would it be possible extending this plugin by simply including another .js which has more code? eg. that i could ask for web.var2 i previously used a prototype function and could "extend" it by simply

问题 I'm not really sure how to ask this question. Basically I am trying to make my view object a singleton extended from the Smarty object. I then want to be able to extend off of the view object to my controller objects. The View object will assign my template variables I want available to all my controllers. I know what I have now has problems, but if someone could point me in the right direction, that would be awesome. I tried to word this the best I could. <?php defined('SITE_ROOT') ? null :

问题 I want to serialize an arraylist of Item but it doesn't work.... my Item class extends Stuff class and has some subclasses . all of my classes implement Serilalizable. i have this part : try{ // Serialize data object to a file ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream("MyData.ser")); out.writeObject(myData); out.close(); // Serialize data object to a byte array ByteArrayOutputStream bos = new ByteArrayOutputStream() ; out = new ObjectOutputStream(bos) ; out

问题 I want to serialize an arraylist of Item but it doesn't work.... my Item class extends Stuff class and has some subclasses . all of my classes implement Serilalizable. i have this part : try{ // Serialize data object to a file ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream("MyData.ser")); out.writeObject(myData); out.close(); // Serialize data object to a byte array ByteArrayOutputStream bos = new ByteArrayOutputStream() ; out = new ObjectOutputStream(bos) ; out

问题 Django version: 4.0.2 Django-Registration version: 0.8 App name: userAccounts PROBLEM: Im trying to create a user type called professor extending the user model. I can complete the registration process, the problem is that only the user is saved on the DB, the professor table keep empty. So i think the problem could be in the save method. Some clue about what could be the problem? SETTINGS.PY AUTH_PROFILE_MODULE = "userAccounts.Professor" MODELS.PY - Here i create the model that extending