Javascript等待函数的结束，包括node.js的异步MYSQL查询?

I'm having Javascript problem to wait a function done before the below line is called. The previous function is including the Javascript MYSQL Queries calls (one of the library of node.js). Then it will be looks like:

在调用下面一行之前，我有一个Javascript问题要等待一个函数完成。前面的函数包括Javascript MYSQL查询调用(node.js库中的一个)。然后会是:

function first() {
    /**
    * a lot processes to execute
    * including Asynchronous processes
    * like running Queries using Javascript MYSQL Library from node.js
    */
    console.log("I am the first one!");
}

first();
console.log("I am the second one!");

Then when i execute this, it happening like:

当我执行它时，它就像:

I am second one!
I am first one!

How do i make them run by keeping the queue order?

如何通过保持队列顺序来运行它们?

NOTE: Now for everyone who confusing the question, please jump/follow my newly created question again:
Everyone please follow/jump into this new question: Node.js MYSQL to detect the INSERT/UPDATE completeness of a Query?

注意:现在，如果大家对这个问题感到困惑，请继续关注我的新问题:大家请继续关注这个新问题:Node。js MYSQL检测查询的插入/更新完整性?

3 个解决方案

#1

Pass a callback to the 2nd function to the call to the 1st function. At the end of the 1st function, invoke theh callback:

将回调传递给第二个函数，以调用第一个函数。在第一个函数的末尾，调用theh回调:

function one(parm, callback) {
    // do something
    callback();
}
function two() {
    // do something else
}

one("my parm", two);

3 个解决方案

#1

更多相关文章

随机推荐