methods

问题 I know about methods() , which returns all methods for a given class. Suppose I have x and I want to know what method will be called when I call foo(x) . Is there a oneliner or package that will do this? The shortest I can think of is: sapply(class(x), function(y) try(getS3method('foo', y), silent = TRUE)) and then to check the class of the results... but is there not a builtin for this? Update The full one liner would be: fm <- function (x, method) { cls <- c(class(x), 'default') results <-

问题 How can I pass the reference of an object to method in Scala? E.g. I want this to compile object Constants { val constantA:Double = ??? } def calc(numbers:Seq[Double], Constants) = ??? // does not compile def calc(numbers:Seq[Double], constants:Constants) = ??? // does not compile Of course I can just reference Constants without passing it through the argument list, but I would prefer to list pass all dependencies of the method explicitly as arguments. 回答1: Constants is an object. You don't

问题 How can I pass the reference of an object to method in Scala? E.g. I want this to compile object Constants { val constantA:Double = ??? } def calc(numbers:Seq[Double], Constants) = ??? // does not compile def calc(numbers:Seq[Double], constants:Constants) = ??? // does not compile Of course I can just reference Constants without passing it through the argument list, but I would prefer to list pass all dependencies of the method explicitly as arguments. 回答1: Constants is an object. You don't

问题 I have a method that takes block of code as an argument. The problem is: how to test using RSpec if this method called the block? The block may be evaluated in any scope the method needs, not necessarily using a yield or block.call . It be passed to another class, or evaluated it in an anonymous class object or somewhere else. For the test to pass it is enough to evaluate the block somewhere as a result of the method call. Is there a way to test something like this using RSpec? See also this

问题 Im trying to change a sibling of a div element and this is the statement i used $('.edit').click(function(){ this.siblings('.innerInfo').html("success"); }); It keeps throwing the <HTMLDivElement> has no method 'siblings' exception, and i really cant figure out why. I've initiated jQuery and ive started the script on document.ready thanks for your help! 回答1: Use $(this) instead of this . 回答2: You're should reference $(this) like: $('.edit').click(function(){ $(this).siblings('.innerInfo')

问题 Do class, method and variable names get included in the MSIL after compiling a Windows App project into an EXE? For obfuscation - less names, harder to reverse engineer. And for performance - shorter names, faster access. e.g. So if methods ARE called via name: Keep names short , better performance for named-lookup. Keep names cryptic , harder to decompile. 回答1: Yes, they're in the IL - fire up Reflector and you'll see them. If they didn't end up in the IL, you couldn't build against them as

问题 This question already has answers here : How to call additional method in enums? (4 answers) Closed 6 years ago . So I am confused on if in Java enums can have functions. I am making a simple html editor and wanted to use enums to represent the html tags, yes I know this is not the best way to go about it but its the way my group decided to implement it. So I have been trying to do something like this, but when I try to call TagEnums.normalTags() it suggests making it a static method, I guess

问题 Hi I'm wondering if there is a simple solution to my problem, I have an ArrayList : ArrayList <Animal> animalList = new ArrayList<Animal>(); /* I add some objects from subclasses of Animal */ animalList.add(new Reptile()); animalList.add(new Bird()); animalList.add(new Amphibian()); They all implement a method move() - The Bird flies when move() is called. I know I can access common methods and properties of the super class by using this public void feed(Integer animalIndex) { Animal aAnimal

问题 I'm really confused with this! I have 2 classes, Club and Membership . In Membership I have the method, getMonth() , and in Club I have joinedMonth() which takes the parameter, 'month' - so a user enters a month and then I want it to return the Membership's which joined in that specific month. I am trying to call the getMonth() method from class Club, so that I can then go on to compare the integers of the months. But, when I try to call the method, I just get the mentioned "non-static method

问题 In kubectl/run.go in Kubernetes code, the Generate function has a result list of these two types: runtime.Object, error The last line of the function is: return &deployment, nil runtime is imported: k8s.io/apimachinery/pkg/runtime I got runtime by running go get on that import statement, and Object is defined in interfaces.go : type Object interface { GetObjectKind() schema.ObjectKind DeepCopyObject() Object } (And I found the same code on the web here.) The address operator creates a pointer