NodeJS异步模块:如何在回调中获取结果对象?

Code Snippets:

代码片段:

var async = require("async");

async.map([
    "a",
    "b",
    "c"
], function(thing, callback) {
  console.log(thing + "-something");
  callback();
},
function(err, results){
    if (err) return console.error(err);
    console.log(results);
});
var async = require("a