methods

问题 I have a quick question for grails. I have a view page that iterates over an array of objects to display them. The HTML/Grails tag code looks like this: <g:each in="${ICFList}" status="i" var="icf"> <tr> <td>${icf.printName?.encodeAsHTML()}</td> <td>${icf.activeNote?.encodeAsHTML()}</td> </tr> </g:each> This code works and displays what I need. However, I don't want to store a printName variable inside my icf object anymore. the object also contains a one character code to identify it, and I

问题 This question already has answers here : Error: Main method not found in class Calculate, please define the main method as: public static void main(String[] args) [duplicate] (5 answers) Closed 4 years ago . Error: Main method not found in class MovieDatabase, please define the main method as: public static void main(String[] args) or a JavaFX application class must extend javafx.application.Application import java.io.FileInputStream; import java.util.Scanner; import java.util.Arrays; public

问题 I want to write a generic method that as input has a list of generic objects. I want to call a method on each of the list items. What I'm trying to do is writing something like: public void ResetPointProperties<T> (List<T> Points) { foreach (T point in Points) { point.Reset(); } } How can I call Reset() on my list items? 回答1: You are almost there. However, what is missing is that as it stands, the compiler does not know whether/that each T has a reset() method. Therefore, you will have to add

问题 This is a followup to a previous issue I was having. I want to give an offset to a signal then add some delay in it and calculate RMSE for that but when taking difference I am having the following issue: I would like to ask the following things: How can I solve the above problem? Will anybody please explain in simple words what iddata does - because I have studied different portals including MATLAB but remained unable to get a good concept. How can I store data of type iddata in cell for

问题 i have a model named test.rb and when i use @tests=Test.new in my controller i get the following error. Can someone temme how can i resolve this? "undefined method `new' for Test:Module" 回答1: Looks like test is already the name of a module called Test if would seem that you have naming conflict. Try placing your own model in a module ie module MyModule class Test < ActiveRecord::Base end end and then calling it like so @test = MyModule::Test.new 来源： https://stackoverflow.com/questions/974060

问题 I have an array of five numbers and an array of 2 numbers. How would I find out the largest number among these 7 numbers? Is there a method that can make things easier? 回答1: int[] array1 = { 0, 1, 5, 2, 8 }; int[] array2 = { 9, 4 }; int max = array1.Concat(array2).Max(); // max == 9 回答2: You can try decimal max = Math.Max(arr1.Max(), arr2.Max()); 回答3: Straightforward way: Math.Max(Math.Max(a,b), c)//on and on for the number of numbers you have using LINQ: int[] arr1; int[] arr2; int highest =

问题 If I'm playing in the REPL and I've defined a few different methods for a function: julia> methods(next) # 3 methods for generic function "next": next(i::BigInt) at none:1 next(i::Int64) at none:1 next(i) at none:1 Can I make Julia forget some or all of these? 回答1: In short, no. Julia does not have an analog of MATLAB’s clear function; once a name is defined in a Julia session (technically, in module Main ), it is always present. If memory usage is your concern, you can always replace objects

问题 Below are the examples of php class code that is static method and non static method. Example 1: class A{ //None Static method function foo(){ if (isset($this)) { echo '$this is defined ('; echo get_class($this); echo ")<br>"; } else { echo "\$this is not defined.<br>"; } } } $a = new A(); $a->foo(); A::foo(); //result $this is defined (A) $this is not defined. Example 2: class A{ //Static Method static function foo(){ if (isset($this)) { echo '$this is defined ('; echo get_class($this); echo

问题 I have an unbound method as <unbound method foo.ops> , i would like to use the same method with another class. take an example class foo2(object): pass foo2.ops = foo.ops however obj = foo2() obj.ops() raises TypeError: unbound method ops() must be called with foo instance as first argument (got nothing instead) 回答1: If you want to add the same method to several unrelated classes (e.g. doing AOP), don't copy an unbound method from one of them. Instead, define a plain function and assign it as

问题 I've a huge project with many classes. I've a very specific class; let's name it SuperFoo . I need to find all calls to the method equals() with argument of type Superfoo . Hope it's clear. So, one more time... in thousands of java files (or bytecode?) I'd like to find all calls to the method java.lang.Object.equals(Object arg) but the argument to this call must be of type SuperFoo . For example: public void doItWith(SuperFoo foo) { if (otherFoo.equals(foo)){ // do something } ... } I checked