javascript - 异步-传递变量和保留上下文

如果您具有以下代码:

var asyncConfig = {};
var a, b;
for(var i = 0; i < someValue; i++) {
    // do something with a
    // do something with b
    asyncConfig[i] = function(callback) {
        func(a, b, callback); // func is async
    }
}
// Include some more parallel or series functions to asyncConfig
async.auto(asyncConfig);

如何将a和b变量的值传递给func，以便在async.auto(asyncConfig)循环后执行for时，保留a和b的上下文？

(对于a的每次执行，b和func的上下文不同。)

先感谢您 !

最佳答案

var asyncConfig = {};
var a, b;
for(var i = 0; i < someValue; i++) {
    // do something with a
    // do something with b
    (function(a,b){
      asyncConfig[i] = function(callback) {
        func(a, b, callback); // func is async
      }
    })(a,b);
}
// Include some more parallel or series functions to asyncConfig
async.auto(asyncConfig);

关于javascript - 异步-传递变量和保留上下文，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/16279034/