setTimeout和每个数组 [英] setTimeout and array each

问题描述

我对使用setTimeout和每个迭代器感到困惑。如何重写以下内容，以便控制台在5秒钟的延迟后输出每个名称？目前，下面的代码会在5秒钟后立即打印所有名称。我想：

I'm confused with using setTimeout and the each iterator. How can I rewrite the following so that the console outputs each name after a delay of 5 seconds? Currently the code below prints all the names at once after 5 seconds. I would like to:

1）等待5秒钟，然后打印kevin

2）等待5秒钟，然后打印mike

3）等待5秒钟，然后打印sally

1) wait 5 seconds, then print kevin
2) wait 5 seconds, then print mike
3) wait 5 seconds, then print sally

var ary = ['kevin', 'mike', 'sally'];

_(ary).each(function(person){

  setTimeout(function(){
    console.log(person);
  }, 5000);    

});

推荐答案

您可以创建一个名为 offset ，使计时器为数组中的每个人多等待5秒，例如：

You could create a variable called offset that makes the timer wait 5 seconds more for each person in the array, like so:

var ary = ['kevin', 'mike', 'sally'];

var offset = 0;
_(ary).each(function(person){

  setTimeout(function(){
    console.log(person);
  }, 5000 + offset);    
 offset += 5000;
});

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