mixins

问题 I wish to remove border radius from all the elements in Bootstrap. So I created custom-mixins.less and placed following lines in it, hopping that it would overwrite the original .border-radius mixin but didn't. // Border Radius .border-radius(@radius) { } So I tried following lines as an alternative which actually worked. // Border Radius .border-radius(@radius) { @radius : 0px; -webkit-border-radius: @radius; -moz-border-radius: @radius; border-radius: @radius; } I tried some mixins at http:

问题 I'm want to create one page with a form, and every time I submit the form it adds an item to the list below the form. I can make it work using 2 pages: one page using the mixin CreateView to add items one page ListView to have the list. But I'm trying to have the form and the list on the same page. So I tried to create a class with both mixin: class FormAndListView(ListView, CreateView): pass Then I've used this class: FormAndListView.as_view( queryset=PdfFile.objects.order_by('id'), context

问题 I'm want to create one page with a form, and every time I submit the form it adds an item to the list below the form. I can make it work using 2 pages: one page using the mixin CreateView to add items one page ListView to have the list. But I'm trying to have the form and the list on the same page. So I tried to create a class with both mixin: class FormAndListView(ListView, CreateView): pass Then I've used this class: FormAndListView.as_view( queryset=PdfFile.objects.order_by('id'), context

问题 I'm trying to understand how the following class works taken from an answer from this thread: Scala Popup Menu Since the thread is pretty old I decided to just start a new question. I'm new to Scala with a Java background and I'm wondering how this class works. I read that an object with the same name as a class is like a class with a singleton object? I'm not sure how this fits in to achieving the wrapper though.. (why do we need the object?) And what exactly does the SuperMixin trait do?

问题 I'm trying to understand how the following class works taken from an answer from this thread: Scala Popup Menu Since the thread is pretty old I decided to just start a new question. I'm new to Scala with a Java background and I'm wondering how this class works. I read that an object with the same name as a class is like a class with a singleton object? I'm not sure how this fits in to achieving the wrapper though.. (why do we need the object?) And what exactly does the SuperMixin trait do?

问题 I'm currently working on a huge javascript project which has a huge class hierarchy and heavily uses mixins to extend functionality of base classes. Here is an example of how mixin looks like, we're using compose library to create class-like objects: // Base.js var Base = compose({ setX: function (x) { this.x = x; }, setY: function (y) { this.y = y; }, setPosition: function (x, y) { this.setX(x); this.setY(y); } }) // SameXAndY.js - mixin var SameXAndY = compose({ // Executes after setX in

问题 Suppose I have the following (not quite biologically correct) classes: class AnimalBaseClass: def __init__(self): self._limbs = None @property def limbs(self): return self._limbs @limbs.setter def limbs(self, value): self.paws = value self._limbs = value class BipedalMixIn: @property def limbs(self): return super().limbs @limbs.setter def limbs(self, value): self.bipedal = (value == 2) # does not work super().limbs = value Here super().limbs = value is not supported by python. If BipedalMixIn

问题 I just want to be able to call {{ globalThing(0) }} in templates, without needing to define globalThing in each .vue file. I've tried all manner of plugin configurations (or mixins? not sure if Nuxt uses that terminology.), all to no avail. It seems no matter what I do, globalThing and this.globalThing remain undefined. In some cases, I can even debug in Chrome and see this this.globalThing is indeed defined... but the code crashes anyway, which I find very hard to explain. Here is one of my

问题 I've been looking for a natural way to implement state-dependent behaviour (state machines) in Python objects. The goal was for objects to have a small number of states, or "mutually orthogonal" aspects of state, which would determine their concrete behaviour at each moment. In other words, the method returned by x.foo should be determined by the current state of x , and if x changes its state, the implementation of some or all of its methods should change accordingly. (I think some call it

问题 Is there a way to specify that a trait has to provide a concrete implementation of a method? Given some mixin class A extends B with C { foo() } The program will compile if either of A , B , or C implements foo() . But how can we force, for example, B to contain foo 's implementation? 回答1: You can do the following: class A extends B with C { super[B].foo() } This will only compile if B implements foo . Use with caution though as it (potentially) introduces some unintuitive coupling. Further,