node.js - 如何复用异步回调函数？

Question

我在两个具有相同回调函数的函数中使用 async.parallel .在第二个函数 (two()) 中添加了第三个函数作为加法函数

function one(){
var testuser = 1;
 async.parallel([onefunction, secondfunction], function(err, result){...})
}

function two(){
var testuser = 2;
async.parallel([onefunction, secondfunction, thirdfunction], function(err, result){...})
}

function onefunction(callback){....code with testuser......}
function twofunction(callback){....code with testuser......}
function thirdfunction(callback){....code with testuser......}

问:如何访问 onefunction、secondfunction 和 thirdfunction 中的 testuser 值。

现在我得到undefined err。我也试过作为正常的参数传递逻辑 onefunction(testuser)，但它不起作用。

我想在多种情况下使用 onefunction、twofunction...我该怎么做？

Answer 1

正如@Felix 所建议的，

function one(){
var testuser = 1;
 async.parallel([onefunction, secondfunction], function(err, result){...})
}

    function two(){
    var testuser = 2;
    async.parallel([
       callback => onefunction(testuser, callback), 
       callback => twofunction(testuser, callback), 
       callback => thirdfunction(testuser, callback)], function(err, result){...})
    }

    function onefunction(callback){....code with testuser......}
    function twofunction(callback){....code with testuser......}
    function thirdfunction(callback){....code with testuser......}