第 2 期(2019-05-09)：定时输出数字 #3

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1. cnyballk commented on May 9, 2019

   

   cnyballk

   on May 9, 2019

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   const outputNumber = () => {
     const max = 5;
     let i = max;
     while (i) {
       setTimeout(i => {
         console.log(max + 1 - i);
       },1000 * i, i--);
     }
   };

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2. liwenkang commented on May 9, 2019

   

   liwenkang

   on May 9, 2019

   Last edited by liwenkang

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   // 利用了 let
   const printNumber = () => {
       for (let i = 5; i > 0; i--) {
           setTimeout(() => {
               console.log(i)
           }, (6 - i) * 1000)
       }
   }
   
   // 利用了闭包
   const printNumber = () => {
       for (var i = 5; i > 0; i--) {
           (function (i) {
               setTimeout(() => {
                   console.log(i)
               }, (6 - i) * 1000)
           })(i)
       }
   }
   
   // 利用了闭包
   const printNumber = () => {
       for (var i = 5; i > 0; i--) {
           setTimeout(((i) => {
               return () => {
                   console.log(i);
               }
           })(i), (6 - i) * 1000);
       }
   }

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3. Wxh16144 commented on May 9, 2019

   

   Wxh16144

   on May 9, 2019

   Last edited by Wxh16144

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   const printNumber = number => {
       console.log(number--);
       number && setTimeout(() => printNumber(number), 1000);
   };
   printNumber(5);

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4. AMY-Y commented on May 9, 2019

   

   AMY-Y

   on May 9, 2019

   Last edited by AMY-Y

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   //setTimeout循环和条件停止循环
   //参考网址：https://blog.csdn.net/qq_28256783/article/details/80097092
   var a=6;
   function printN(){
      if(a>1){
        a=a-1;
        console.log(a);
        setTimeout("printN()",1000)
      }
   }
   printN();
5. wingmeng commented on May 10, 2019

   

   wingmeng

   on May 10, 2019

   CollaboratorAuthor

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   const printNumber = number => {
       console.log(number--);
       number && setTimeout(() => printNumber(number), 1000);
   };
   printNumber(5);

   好优雅的代码 👍 ，不过第一个数字是直接打印出来的，根据题意，所有的数字都应该隔1s才打印