如何为Foreach循环添加setTimeout函数

Question

Hi want to set the timeout funtion for the Freach loop for the callback i am setting the timeout funtion. but its displaying Undifined error. can anybody Explain me here is My code.

 function async(array,cb){ array.forEach(function () { setTimeout(cb,0); }) } async([1,2,3,4],function(i){ console.log(i); }); 

Answer 1

Try:

 function async(array,cb){ array.forEach(function(e) { setTimeout(function() { cb(e); },0); }); } async([1,2,3,4,5], function(i) { console.log(i); });