methods

问题 I know there are a lot of threads talking about this and believe me I've seen all of them, but I think I'm a little slow and cant figure out how to do this so here is the thing! I have one form public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button4_Click(object sender, EventArgs e) { adi mYadi= new adi(); adi.paso(); } private void Form1_Load(object sender, EventArgs e) { } public void l8u(string l ) { label8.Text = l; } } The l8u method is supposed

问题 I already found different solutions on Stackoverflow, but there were some things I didn´t understand. Whats the best method to calculate the Output of e.g.: ((1+(4*(2+3)))+((2+3)*(4*5))) ? My method looks as following, but I know there are lots of mistakes in it: public static int ComputeInfix(string infix) { Stack<char> operatorstack = new Stack<char>(); Stack<int> operandstack = new Stack<int>(); for(int j = 0; j < infix.Length; j++) { char c = infix[j]; if (c => 0 && c <= 9) { operandstack

问题 This question already has answers here : Why python need parentheses in function call? [closed] (2 answers) Closed 2 years ago . This question is just an attempt at understanding something; I know what to do, just want to know what is the difference between: datetime.datetime.now().date and datetime.datetime.now().date() 回答1: Parentheses denote that you actually want to call the method, rather than mention it for later use. On a line of its own, the latter doesn't appear to make sense, but in

问题 This is a general Postgres backup and restore method question, based on the following use case for a non production server (i.e. a local testing server). I have a ~20gb database that I will mangle during the testing of a php script that will result in the need to drop it and recreate it quite often. Running dumped SQL to restore it takes quite a lot of time, and I'm on a tight deadline, so I wondered if there was a method whereby I could speed up the process. I thought the following may work:

问题 Any other errors aside, I need a way of converting my Color grayScale into an int. When I plug in the Color, I get an error. setRGB method takes an x, a y, and an rgb int as parameters. How do I change my Color into an int? import java.awt.*; import java.awt.event.*; import java.util.*; import java.io.*; import javax.swing.*; import java.awt.image.*; import javax.imageio.ImageIO; public class Picture{ Container content; BufferedImage image, image2; public Picture(String filename) { File f =

问题 This is probably a simple fix, but I am just not seeing it. I am trying to figure out, how do I get my printOut() method to print properly from the main Project5PartA ? Do I need get, set, and return methods? Also, is my while loop even necessary in the Tester class? The program compiles and keeps running to infinity, so I guess the while loop is wrong. But it also only prints out [Ljava.lang.String;@7c1c8c58 continuously on each line. The classes that extend the main are irrelevant and part

问题 This isn't for anything I'm working on yet, it's just some test code as I'm just learning class methods and suck. But say I have the following code class Test(int): def __init__(self,arg): self = arg def thing(self): self += 10 and going, foo=Test(12) sets foo to 12. However I want it, so when I do, foo.thing(), foo increases by 10. So far, going foo.thing() just keeps it at 12. How would I change this code to do that. 回答1: Because int is a immutable, you cannot magically turn it into a

问题 So my problem is that I need these methods to run one after another but I cannot work out how to make the methods wait before being run. Any help is appreciated. Thank you. Here is my code: public void startMoving() throws InterruptedException { moveEnemy("right",3); wait(); moveEnemy("down",3); wait(); moveEnemy("right",2); wait(); moveEnemy("up",1); wait(); moveEnemy("right",2); wait(); moveEnemy("up",2); wait(); moveEnemy("right",2); wait(); moveEnemy("down",4); wait(); moveEnemy("left",1)

问题 I want to display a tree of categories managed with the gem ancestry. I would like to use a helper which will recursively go through the tree and return the categories one by one, for the moment without html tags or content. module CategoriesHelper def display_tree(category) if category.has_children? category.children.each do |sub_category| display_tree(sub_category) puts(sub_category.name) # to check if it goes here end end category.name end end The category argument is one of the root

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