Random lottery turntable wechat applet project source code

Wechat applet ： Chuangxiang diary
send out ： Lottery turntable
Get the full source code （ Wechat developer tools are available when opened ）

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It can be easily modified by itself , Integrate into your own project .

function formatTime(date) {
    
  var year = date.getFullYear()
  var month = date.getMonth() + 1
  var day = date.getDate()

  var hour = date.getHours()
  var minute = date.getMinutes()
  var second = date.getSeconds()


  return [year, month, day].map(formatNumber).join('/') + ' ' + [hour, minute, second].map(formatNumber).join(':')
}

function formatNumber(n) {
    
  n = n.toString()
  return n[1] ? n : '0' + n
}

module.exports = {
    
  formatTime: formatTime
}

<!--index.wxml-->
<view class="container-out">
  <view class="circle" wx:for="{
     {circleList}}" style="top:{
        {
        item.topCircle}}rpx;left:{
        {
        item.leftCircle}}rpx;background-color: {
        {
        (index%2==0)?colorCircleFirst:colorCircleSecond}};"></view>
  <view class="container-in">
    <view class="content-out" wx:for="{
     {awardList}}" style="top:{
        {
        item.topAward}}rpx;left:{
        {
        item.leftAward}}rpx;background-color: {
        {
        (index==indexSelect)?colorAwardSelect:colorAwardDefault}};">
      <image class="award-image" src="{
     {item.imageAward}}"></image>
    </view>
    <view class="start-btn" bindtap="startGame" style=" background-color:{
      {isRunning?'#e7930a':'#ffe400'}}">START</view>
  </view>
</view>

probability , Also known as “ Probability rate ”, It reflects the probability of random events . A random event is a random event under the same conditions , Events that may or may not occur . for example , From a batch of goods with genuine and defective products , Take one at random ,“ It's authentic ” It's just a random event . Suppose a random phenomenon is n Test and observation , among A The incident occurred m Time , That is, the frequency of its occurrence is m/n. After a lot of trial and error , There is often m/n Closer and closer to a certain constant （ See Bernoulli's law of large numbers for the proof of this conclusion ）. This constant is the event A Probability of occurrence , Commonly used P (A) Express .

The first person to systematically calculate probability is 16 Caldano in the th century . Recorded in his works 《Liber de Ludo Aleae》 in . The content about probability in the book is written by Gould Translated from Latin .

There's a lot of advice for gamblers in caldano's math books . These suggestions are written in short essays . However , It was in a series of letters between Pascal and Fermat that the first systematic study of probability was proposed . These communications were originally proposed by Pascal , He wants to ask Fermat for some advice about Chevvalier de Mere Questions raised .Chevvalier de Mere Is a famous writer , The dignitaries of Louis XIV's court , And a fanatical gambler . The main problems are two ： The dice problem and the game bonus distribution problem .

Probability is a measure of the probability of an accidental event . If you repeat the test many times ( use X representative ), An accident ( use A representative ) Several times ( use Y representative ). With X As the denominator ,Y As molecule , Form a numerical value ( use P representative ). In many experiments ,P Relatively stable at a certain value ,P It's called A Probability of occurrence . For example, the probability of accidental events is determined through long-term observation or a large number of repeated tests , Then this probability is statistical probability or empirical probability .

The discipline that studies the internal laws governing accidental events is called probability theory . It belongs to a branch of Mathematics . Probability theory reveals the expression form of the internal law contained in accidental phenomena . therefore , probability , It plays an important role in people's understanding of natural and social phenomena . such as , Social products should be deducted before being allocated to individual consumption , How much to deduct , The proportion of accumulation in national income, etc , We need to use probability theory to determine .