首页const { startTime, endTime} = this.$route.query this.searchCondition.time[0] = startTime || ""this.searchCondition.time[1] = endTime || ""幫我优化以上代码

const { startTime, endTime} = this.$route.query this.searchCondition.time[0] = startTime || ""this.searchCondition.time[1] = endTime || ""幫我优化以上代码

时间: 2024-02-28 17:54:52 浏览: 71

获得当前时间并且停止或开始时间

import java.awt.*; import java.awt.event.*; import java.util.*; public class Time extends Frame{ Label label; Button stopButton,startButton; Panel pa; Thread th; public Time(String title){ super(title); setSize(200,200); setLocation(100,100); label=new Label(); stopButton=new Button("stop"); startButton=new Button("start"); pa=new Panel(); pa.add(stopButton); pa.add(startButton); add(label,BorderLayout.NORTH); add(pa,BorderLayout.SOUTH); th=new Thread(new MyTime()); th.start(); addWindowListener(new WindowAdapter(){ public void windowClosing(WindowEvent e){ System.exit(0); } }); stopButton.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ String str=e.getActionCommand(); if(str.equals("stop")){ th.stop(); } } }); startButton.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ String str=e.getActionCommand(); if(str.equals("start")){ th=new Thread(new MyTime()); th.start(); } } }); setVisible(true); } class MyTime extends Thread{ public void run(){ while(true){ Date d=new Date(); String tt=d.toString(); System.out.println(tt); label.setText(tt); try{ Thread.sleep(1000); }catch(InterruptedException e){ System.out.println(e.getMessage()); } } } } public static void main(String[] args){ Time t=new Time("time"); } }

可以使用逻辑或运算符的短路特性来进行优化，避免重复的赋值操作。可以尝试如下代码： ``` const { startTime, endTime } = this.$route.query; this.searchCondition.time[0] ||= startTime || ""; this.searchCondition.time[1] ||= endTime || ""; ``` 这里使用了 `||=` 运算符，它表示如果 `this.searchCondition.time[0]` 或 `this.searchCondition.time[1]` 已经有值，则不会执行后面的赋值语句，否则会将 `startTime` 或 `endTime` 的值赋给相应的属性。这样可以简化代码，避免了重复的赋值操作。

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