methods

问题 Can I and how could I call the main method from another method in Java? Please explain using the code below: public class arraysAndMethods { public void printArray(double[] arr) { int x = public arraysAndMethods.main(int[] studGrades); // pass array in main mehthod to other methods //int a=main(args[]); for (int i = 0; i < studGrades.lenght; i++) System.out.print(studGrades[i] + " "); }// end of printArray method public static void main(String args[]){ java.util.Scanner input = new java.util

问题 I am working on an assignment where I create "instances" of cities using rows in a .csv, then use these instances in methods to calculate distance and population change. Creating the instances works fine (using steps 1-4 below), until I try to call printDistance: ##Step 1. Open and read CityPop.csv with open('CityPop.csv', 'r', newline='') as f: try: reader = csv.DictReader(f) ##Step 2. Create "City" class class City: ##Step 3. Use _init method to assign attribute values def __init__(self,

问题 class Box { // Instance Variables double length ,ipsos ; double width ,mikos ; double height ,platos; // Constructors public Box ( double side ) { width = side ; height = side ; length = side ; } public Box ( double x , double y , double z) { platos = y ; ipsos = z; mikos = x ; } // Methods double calculate(double praksi) { return 2 * ( width * height + width * length + height * length ) ; } double volume(double emvadon) { return platos*ipsos*mikos ; } } In the upper code, how can I make a

问题 I'm currently trying to access a double from another load form method. Once I change a check box I wish to add/subtract from this variable. I have commented on both the variable and the problem. using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; namespace Virtual_Car_Dealer { public partial class BMW : Form { private CarDatabase

问题 I just want to hit URL : http://kiascenehai.pk/rest_api/todayEvents/api-key/Of7NU7Jimh665D5G5VwO2eKO69sWv9lf/format/json and parameter is city_id.i.e: /city_id/1 but; compiler creates Error Domain=NSURLErrorDomain Code=-1002 "unsupported URL" or error 300; so what shall be best way to pass arguments in a method in objective c???it also causes Error Domain=kCFErrorDomainCFNetwork Code=303 "The operation couldn’t be completed. (kCFErrorDomainCFNetwork error 303 It will be pleasure for me if any

问题 I am new at programming and I am trying to create a method that allows me search Id inside a [10,4] matrix, however I don't get how to do it without using nested fors and also if and else statement. The problem is related to output, I know the structure isn't correct, but since I don't what else can be done I am trying make it as it is: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace menu { class Program { enum

问题 for(int i=0;i<dictionary.words.length;i++){ if(dictionary.words[i].length() <=maxWordlength){ count++; smallWordDictionary[i]=dictionary.words[i]; } } I used this code to store the strings from a dictionary array into an array containing strings with a shorter word length. I now want to pass this array alongside a random number to the following method( to create a randomly generated word ): randomWord(smallWordDictionary, outcome); When I use the following method: static void randomWord

问题 How do I pass an array from my main method to another method? I'm having an error with the parameters. Do I use the return value from main? And since the return value from main is an array, should the parameters for the call of main have brackets? Should there be a value between those brackets? public class arraysAndMethods { public void printArray(double[] arr) { int x = arraysAndMethods.main(double[i] arr);//error with paremeters for (int i = 0; i < studGrades.lenght; i++) System.out.print

问题 I have a gui application I put text into text box and then click on the pushButton, The function callprinttext() in the moduel_b.py be called. The function callprinttext() is calling method printtext() in the moduel_c.py but I have an error: AttributeError: 'class_c' object has no attribute 'lineEdit' can anyone help me with class_c ? Here's the code for that: module_c.py class class_c (object): def __init__(self, parent=None): self.parent=parent ### I want a fix for error here def printtext

问题 I have an older application running Ruby on Rails 2.2, and I'm having trouble getting a gem to work because it can't find the current environment with Rails.env : $ script/console >> Rails.env NoMethodError: undefined method `env' for Rails:Module from (irb):1 The gem is set up to use Rails.env when Rails is defined, and RAILS_ENV when it's not. But I seem to have a Rails object without an env method (even though I read that method was added in Rails 2). Any idea what's going on? 回答1: The