methods

问题 I'm very new to android and I'm following this example. The code says we need to do these steps to get an dialog box: AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); // 2. Chain together various setter methods to set the dialog characteristics builder.setMessage(R.string.dialog_message) .setTitle(R.string.dialog_title); // 3. Get the AlertDialog from create() AlertDialog dialog = builder.create(); But where does the getActivity() method is defined? I can't find that

问题 With PHPUnit and PHP >= 5.3 it is possible to test protected methods. The following page at stackoverflow outlined the best practice on it: "Best practices to test protected methods with PHPUnit" protected static function callProtectedMethod($name, $classname, $params) { $class = new ReflectionClass($classname); $method = $class->getMethod($name); $method->setAccessible(true); $obj = new $classname($params); return $method->invokeArgs($obj, $params); } To test public methods on abstract

问题 I'm currently learning Python and Classes and I have a basic question, but I didn't find any answer to it. Let's say I have this dummy class class DomainOperations: def __init__(self, domain): self.domain = domain self.domain_ip = '' self.website_thumbnail = '' def resolve_domain(self): #resolve domain to ipv4 and save to self.domain_ip def generate_website_thumbnail(self): #generate website thumbnail and save the url to self.website_thumbnail I want to run simultaneously resolve_domain and

问题 I program regularly in R in a professional context, and I write packages for clients or co-workers as well. Some of the programmers here have a Java background and insist on doing everything the object-oriented way, using S4 methods. My experience on the other hand is that S4 implementations often perform worse and cause a lot more headache when trying to get the code do what you want it to do. I definitely agree that in some cases, you have to be able to construct complex objects or append

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 7 years ago . I am working to set some programming practices standards for my organization. Doing so i came across the issue "Title of this question

问题 I have this as one of my members of the class 'KeyEvent': private delegate void eventmethod(); And the constructor: public KeyEvent(eventmethod D) { D(); } What I want to do is instead of calling D() there, I want to store that method (D) as a member variable of KeyEvent, so something like: stored_method = D(); And then later in another method of KeyEvent, do something like: stored_method(); How can I do this? 回答1: You pretty much have the code already. Just create a member field of the right

问题 list.Min() gets me the min value as integer. I want to get the object in List which has the min value for a certain property X. How can I do that? 回答1: Have a look at MinBy in MoreLINQ - or I believe Reactive Extensions has something similar in System.Interactive : var cheapestProduct = products.MinBy(p => p.Price); If more than one item has the lowest value, the earliest one in the sequence will be returned. 来源： https://stackoverflow.com/questions/6414052/get-object-with-minimum-value-using

问题 This question already has answers here : Closed 10 years ago . Duplicate : What does the 'static' keyword do in a class? I've read this post already. What does the "static" keyword in a method do? I remember being told that static != clingy...but that is pretty much all I know about this keyword. 回答1: Static class variables can be thought of as a global class. No matter how many instances of the class you have, there is just one instance of each static variable. Static methods don't use any

问题 I would like to test my class' equals() method but Mockito seems to be calling the stub version every time. My test is as follows; PluginResourceAdapter adapter = mock (PluginResourceAdapter.class); PluginResourceAdapter other = mock (PluginResourceAdapter.class); when(adapter.getNumberOfEndpointActivation()).thenReturn(1); when(other.getNumberOfEndpointActivation()).thenReturn(0); boolean result = adapter.equals(other); assertFalse(result); I know I cannot stub the equals method which means

问题 class MyClass: def myMethod(self): pass myInstance = MyClass() methodReference = myInstance.myMethod Now can you get a reference to myInstance if you now only have access to methodReference ? 回答1: methodReference.im_self and by a similar token, for the class: methodReference.im_class For this kind of code discovery you should install iPython and use tab, for instance, in your case myReference.+TAB would give: In [6]: methodReference. methodReference.im_class methodReference.im_func