timedelay

问题 I have a paintComponent method, inside a class.It makes a grid of 10*10. And I want to lower the frame rate, so that every time the function colors a rectangle in the grid, I can see the progression public void paint(Graphics g1) { super.paint(g1); Graphics2D g= (Graphics2D) g1; for(Object a: Maze_Generator.list) { Cell c =(Cell)a; if(c.top()) g.drawLine(c.x(), c.y(), c.x()+c.length(), c.y()); if(c.bottom()) g.drawLine(c.x(), c.y()+c.length(),c.x()+c.length(),c.y()+c.length()); if(c.left()) g

问题 I have a paintComponent method, inside a class.It makes a grid of 10*10. And I want to lower the frame rate, so that every time the function colors a rectangle in the grid, I can see the progression public void paint(Graphics g1) { super.paint(g1); Graphics2D g= (Graphics2D) g1; for(Object a: Maze_Generator.list) { Cell c =(Cell)a; if(c.top()) g.drawLine(c.x(), c.y(), c.x()+c.length(), c.y()); if(c.bottom()) g.drawLine(c.x(), c.y()+c.length(),c.x()+c.length(),c.y()+c.length()); if(c.left()) g

问题 The delay function of dos.h header file does not work in codeblocks. It shows that delay function is undeclared. the following link contains the program below. link int main () { printf ( " This c program will exit in 10 seconds.\n"); delay(10000); return 0; } 回答1: I was also having same problem & I used this function #include <time.h> void delay(int milliseconds) { long pause; clock_t now,then; pause = milliseconds*(CLOCKS_PER_SEC/1000); now = then = clock(); while( (now-then) < pause ) now

问题 I am using JiTCDDE to solve DDE's on a modified Oregantor model. The issue I am having is near the bifurcation point it will return negative values. While I know these are mathematically valid solutions, the Oregantor represents a chemical system. Hence, negative answers are not realistic to a real system. Is there a way to set up the code to return a minimum value for a variable when it is <=0. Below is the main part of the code I have so far. def P1(k): return( ((H*y(k))/(k01+H*y(k)+kl*H*H

问题 I am using JiTCDDE to solve DDE's on a modified Oregantor model. The issue I am having is near the bifurcation point it will return negative values. While I know these are mathematically valid solutions, the Oregantor represents a chemical system. Hence, negative answers are not realistic to a real system. Is there a way to set up the code to return a minimum value for a variable when it is <=0. Below is the main part of the code I have so far. def P1(k): return( ((H*y(k))/(k01+H*y(k)+kl*H*H

问题 I have put an image in imageView in LaunchStoreyboard . How can I delay the time of image programmatically? Here is the Launch Screen Guideline from Apple . Here is code for Launch Screen View controller : import UIKit class LaunshViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() self.delay(0.4) } func delay(_ delay:Double, closure:@escaping ()->()) { let when = DispatchTime.now() + delay DispatchQueue.main.asyncAfter(deadline: when, execute: closure) } }

问题 this.setState(prevState => ({ score: prevState.score + 10, rightAnswers: prevState.rightAnswers + 1, currentQuestion: setTimeout(() => { prevState.currentQuestion + 1 }, 2000) })) } On button click I change the state. My goal is to have a delay in currentQuestion state change, during which I want to show certain status messages, yet I want to update the score right away without delays. What's the proper way to do that? PS: This variant doesn't work, it's for the overall representation of what

问题 I have something like this I/global ( 3622): Loaded time zone names for en in 355ms. I/global ( 3622): Loaded time zone names for en in 307ms. I/global ( 3622): Loaded time zone names for en in 309ms. I/global ( 3622): Loaded time zone names for en in 310ms. I/global ( 3622): Loaded time zone names for en in 324ms. and I do not have any idea where this log comes from. I was doing some research on this topic and I guess it comes from new Date(); but I am not sure. I need advice what should I

问题 I have something like this I/global ( 3622): Loaded time zone names for en in 355ms. I/global ( 3622): Loaded time zone names for en in 307ms. I/global ( 3622): Loaded time zone names for en in 309ms. I/global ( 3622): Loaded time zone names for en in 310ms. I/global ( 3622): Loaded time zone names for en in 324ms. and I do not have any idea where this log comes from. I was doing some research on this topic and I guess it comes from new Date(); but I am not sure. I need advice what should I

问题 I am using scrapy script to load URL using "yield". MyUrl = "www.example.com" request = Request(MyUrl, callback=self.mydetail) yield request def mydetail(self, response): item['Description'] = response.xpath(".//table[@class='list']//text()").extract() return item The URL seems to take minimum 5 seconds to load. So I want Scrapy to wait for some time to load the entire text in item['Description']. I tried "DOWNLOAD_DELAY" in settings.py but no use. 回答1: Make a brief view on firebug or another