nodejs Async.each Nested loop Confusion

问题:

i want to have two nested for loops

async.each(ListA,
function(itemA,callback1){
        //process itemA
        async.each(itemA.Children,
        function(itemAChild,callback1){
              //process itemAChild  
              callback1();
               }),
    function(err){
    console.log("InnerLoopFinished")
    }   

callback();
}),function(err){
console.log("OuterLoopFinished")
}
console.log("Process Finished")

Now i expect an output Like { InnerLoopFinished OuterLoopFinished } according to List Size and

process Finsished

Bt what i get is Process Finished at First and InnerLoop and Outerloop message depending upon loop size..

Im process data in both loops so when control goes to print "final process" message i expect all my data is populated to an Object Before that and send it as a response which isnt achieved here

I think imnt not clear about idea of working async.each..Can someone help me to achieve the desired output

回答1:

async.each(ListA, function (itemA, callback) { //loop through array
    //process itemA
  async.each(itemA.Children, function (itemAChild, callback1) { //loop through array
    //process itemAChild
    callback1(); 
    }, function(err) {
      console.log("InnerLoopFinished");
      callback();
    });
  }, function(err) {
    console.log("OuterLoopFinished");
    console.log('Process Finished');
});