有效沟通问答-【官方】百战程序员_IT在线教育培训机构

import turtle
turtle.pen()

turtle.speed(0)

turtle.penup()
turtle.goto(160,-200)
turtle.pendown()
turtle.goto(-200,-200)

turtle.penup()
turtle.goto(160,-180)
turtle.pendown()
turtle.goto(-200,-180)

turtle.penup()
turtle.goto(160,-160)
turtle.pendown()
turtle.goto(-200,-160)

turtle.penup()
turtle.goto(160,-140)
turtle.pendown()
turtle.goto(-200,-140)

turtle.penup()
turtle.goto(160,-120)
turtle.pendown()
turtle.goto(-200,-120)

turtle.penup()
turtle.goto(160,-100)
turtle.pendown()
turtle.goto(-200,-100)

turtle.penup()
turtle.goto(160,-80)
turtle.pendown()
turtle.goto(-200,-80)

turtle.penup()
turtle.goto(160,-60)
turtle.pendown()
turtle.goto(-200,-60)

turtle.penup()
turtle.goto(160,-40)
turtle.pendown()
turtle.goto(-200,-40)

turtle.penup()
turtle.goto(160,-20)
turtle.pendown()
turtle.goto(-200,-20)

turtle.penup()
turtle.goto(160,0)
turtle.pendown()
turtle.goto(-200,0)

turtle.penup()
turtle.goto(160,20)
turtle.pendown()
turtle.goto(-200,20)

turtle.penup()
turtle.goto(160,40)
turtle.pendown()
turtle.goto(-200,40)

turtle.penup()
turtle.goto(160,60)
turtle.pendown()
turtle.goto(-200,60)

turtle.penup()
turtle.goto(160,80)
turtle.pendown()
turtle.goto(-200,80)

turtle.penup()
turtle.goto(160,100)
turtle.pendown()
turtle.goto(-200,100)

turtle.penup()
turtle.goto(160,120)
turtle.pendown()
turtle.goto(-200,120)

turtle.penup()
turtle.goto(160,140)
turtle.pendown()
turtle.goto(-200,140)

turtle.penup()
turtle.goto(160,160)
turtle.pendown()
turtle.goto(-200,160)

turtle.penup()
turtle.goto(-200,160)
turtle.pendown()
turtle.goto(-200,-200)

turtle.penup()
turtle.goto(-180,160)
turtle.pendown()
turtle.goto(-180,-200)

turtle.penup()
turtle.goto(-160,160)
turtle.pendown()
turtle.goto(-160,-200)

turtle.penup()
turtle.goto(-140,160)
turtle.pendown()
turtle.goto(-140,-200)

turtle.penup()
turtle.goto(-120,160)
turtle.pendown()
turtle.goto(-120,-200)

turtle.penup()
turtle.goto(-100,160)
turtle.pendown()
turtle.goto(-100,-200)

turtle.penup()
turtle.goto(-80,160)
turtle.pendown()
turtle.goto(-80,-200)

turtle.penup()
turtle.goto(-60,160)
turtle.pendown()
turtle.goto(-60,-200)

turtle.penup()
turtle.goto(-40,160)
turtle.pendown()
turtle.goto(-40,-200)

turtle.penup()
turtle.goto(-20,160)
turtle.pendown()
turtle.goto(-20,-200)

turtle.penup()
turtle.goto(0,160)
turtle.pendown()
turtle.goto(0,-200)

turtle.penup()
turtle.goto(20,160)
turtle.pendown()
turtle.goto(20,-200)

turtle.penup()
turtle.goto(40,160)
turtle.pendown()
turtle.goto(40,-200)

turtle.penup()
turtle.goto(60,160)
turtle.pendown()
turtle.goto(60,-200)

turtle.penup()
turtle.goto(80,160)
turtle.pendown()
turtle.goto(80,-200)

turtle.penup()
turtle.goto(100,160)
turtle.pendown()
turtle.goto(100,-200)

turtle.penup()
turtle.goto(120,160)
turtle.pendown()
turtle.goto(120,-200)

turtle.penup()
turtle.goto(140,160)
turtle.pendown()
turtle.goto(140,-200)

turtle.penup()
turtle.goto(160,160)
turtle.pendown()
turtle.goto(160,-200)

turtle.done()

好长有没有更好方法而且要解释能明白

Python 全系列/第一阶段：Python入门/控制语句 25310楼

TestThis {
    (){

        System..println()}

    (ab){
        ()a = a.=a.=b}
    (abc){
        (ab).= c}

        (){

        }
        (){
            .sing()System..println()}

    (String[] args) {
        TestThis hi = TestThis()hi.eat()}



}

为什么这里结果会输出一个“正在初始化一个Hello对象”呢？，main方法里面也没有输出它呀

JAVA 全系列/第一阶段：JAVA 快速入门/面向对象详解和JVM底层内存分析 25311楼

老师，我的ua.ie 还有ua.random之类的打印不出来东西，有报错，请问该如何解决？

from urllib.request import Request,urlopen
from fake_useragent import UserAgent

ua = UserAgent()

# print(ua.random)
url = 'http://httpbin.org/get'
headers = {
    'User-Agent':ua.random
}
req = Request(url,headers=headers)
resp = urlopen(req)
info = resp.read().decode()
print(info)

Python 全系列/第十五阶段：Python 爬虫开发/scrapy框架使用（旧） 25312楼

微信图片_20221021161638.png

// pages/musicList/musicList.js
const {request}=require('../../utils/request')
Page({

    /**
     * 页面的初始数据
     */
    data: {
      songs:[],
      limit:20,
      offset:1,
      search:''
    },

    /**
     * 生命周期函数--监听页面加载
     */
    onLoad(options) {
  console.log(options);
  this.setData({
      search:options.search
  })
  this.http(this.data.search,this.data.limit,this.data.offset)
    },
http(keywords,limit,offset){
    request("http://iwenwiki.com:3000/search",{keywords,limit,offset},'GET').then(res=>{
        console.log(res);
        if(res.data.result.songs){
            this.setData({
                songs:this.data.songs.concat(res.data.result.songs)
            })
        }else{
            wx.showToast({
              title: '暂无数据',
            })
        }
    }).catch(err=>{
        wx.showToast({
          title: '请求出错了',
        })
        console.log(err);
    })
},
    /**
     * 生命周期函数--监听页面初次渲染完成
     */
    onReady() {

    },

    /**
     * 生命周期函数--监听页面显示
     */
    onShow() {

    },

    /**
     * 生命周期函数--监听页面隐藏
     */
    onHide() {

    },

    /**
     * 生命周期函数--监听页面卸载
     */
    onUnload() {

    },

    /**
     * 页面相关事件处理函数--监听用户下拉动作
     */
    onPullDownRefresh() {
         this.setData({
             offset:1,
             songs:[]
         })
         this.http(this.data.search,this.data.limit,this.data.offset)
    },
    //跳转到播放器页面
    goToPlayer(e){
        console.log(e);
        
        console.log(e.currentTarget.dataset);
        console.log(e.currentTarget.dataset.id);
        wx.navigateTo({
          url: '../player/player?id=?'+e.currentTarget.dataset.id
        })
    },

    /**
     * 页面上拉触底事件的处理函数
     */
    onReachBottom() {
        this.setData({
            offset: this.data.offset += 20
           })
          this.http(this.data.search, this.data.limit, this.data.offset)
         
    },

    /**
     * 用户点击右上角分享
     */
    onShareAppMessage() {

    }
})

console.log(e.currentTarget.dataset)

老师为啥我正常

 console.log(e.currentTarget.dataset.id);

underfind呢？

WEB前端全系列/第十四阶段：微信小程序/小程序API 25313楼

这个total为什么是负数？没有负号呀~

JAVA 全系列/第一阶段：JAVA 快速入门/变量、数据类型、运算符 25314楼

var image = new Image();
image.src = "http://iwenwiki.com/banner1.png"
image.onload = function(){
  console.log("图片的资源加载完成了");
  document.body.appendChild(image);
}

这个 var image = new Image(); 是什么意思？还有没有类似的

WEB前端全系列/第二阶段：JavaScript编程模块/DOM模型 25315楼