methods

问题 I'm trying to find info on the p method in Ruby. It seems to produce internal info on the properties of a class but when I try to search for it I get every word that has the letter "p" in it. 回答1: Have you seen the api doc page? http://www.ruby-doc.org/core/Kernel.html#method-i-p There's also http://apidock.com/ruby/Kernel/p 回答2: Each method you can call "directly", e.g: print, p, abort, puts, readline, etc., is located in the Kernel class. (Kernel.methods - Object.methods).sort.each do

问题 how to fire notification from BroadcastReceiver (can't use most methods and can't use "this")? I need it to open a activity with info from the DB I already did it but now must of the methods dosen't work and I cant use "this" 回答1: In the onReceive method you get a Context object. So use it to get the NotificationManager and fire your notification. public void onReceive(Context ctx, Intent intent) { NotificationManager nm = (NotificationManager)ctx.getSystemService(Context.NOTIFICATION_SERVICE

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . I need to execute a method on a specific date of every year, how could I do this in java? Thanks, Chris. 回答1: In order of preference: The Quartz library (highly recommended). java.util.Timer . Not as powerful as Quartz, but good for simple jobs. The EJB timer service. It's poorly documented, it requires a full

问题 My code is quite simple actually. I saw a simple and similar code was from this article. At first, I have 1 combobox . I have a listener on it called itemStateChanged() . My purpose to add into this listener is that; " to execute some code when user click (select) an item from its dropbox ". Cmb_ItemCategory = new javax.swing.JComboBox(); Cmb_ItemCategory.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Loading..." })); Cmb_ItemCategory.addItemListener(new java.awt.event

问题 As we know, wo can pass a method to a iterator method by a &: prefix. For example: ["a", "b"].map(&:upcase) #=> ["A", "B"] def rettwo 2 end ["a", "b"].map(&:rettwo) #=> [2, 2] Here is the problem, when I write a method, pass a method with &: prefix to it, I got a error message: "ArgumentError: no receiver given". Let me show the code: def a_simple_method &proc puts proc.class # it shows `Proc` proc.call end def a_iterator_method puts yield end a_simple_method &:rettwo #=> ArgumentError: no

问题 I'm dealing with fragments. I have an Activity and different fragments . Each fragment need the access to a Class(call it X) that allow it to access a database, but, because I have a lot of fragments, I don't want to create a different instance of the Class X in every fragment as I think it will require lots of memory . So how can I do? I wrote something like this (with a getter), but it doesn't work! public class MyActivity { private ClassX classx; ..... public ClassX getClassX() { return

问题 Is it possible to call managed method from windbg? Is there any .NET equivalent for .call ? Or how to use it to call managed method? I'm interested in attaching as a live session to a process on production (Release with no pdb) where is no possibility to use Visual Studio Debugger. 来源： https://stackoverflow.com/questions/7151301/is-it-possible-to-call-a-method-from-windbg-sos

问题 If I have a java class which is package-private (declared with "class", not "public class"), there is really no difference if the methods inside are declared public or protected or package-private, right? So which should I use, or when should I use which? I'm a bit confused. 回答1: If I have a java class which is package-private (declared with "class", not "public class"), there is really no difference if the methods inside are declared public or protected or package-private, right? Well maybe

问题 Can I have a method which takes arguments that are denoted with the same names as the members of the holding class? I tried to use this: class Foo { public: int x, y; void set_values(int x, int y) { x = x; y = y; }; }; ... but it doesn't seem to work. Is there any way of accessing the the instance the namespace of which I'm working in, similar to JavaScript's this or Python's self ? 回答1: It's generally a good idea to avoid this kind of confusion by using a naming convention for member

问题 class One { void foo() { } } class Two extends One { private void foo() { /* more code here */ } } Why is the above snippet of code wrong? 回答1: I'm going to try to incorporate the ideas from the other answers to come up with a single answer. First off, let's take a look at what's going on in the code. A look at the code The One class has a package-private foo method: class One { // The lack of an access modifier means the method is package-private. void foo() { } } The Two class which