问题返回变量 [英] Problem returning variables

问题描述

我正在浪费很多时间去尝试做我不知道是否可能的事情:

I''m losing many time trying to do a thing I dont know if Its possible:

function botaoCarregarNotas() {
     PageMethods.verNum(verNum2);
     PageMethods.carregarNotas(verTexto);
 }
 // aqui é recebido o resultado
function verNum2(result) {
    var num = result;
    alert("num: "+num);
    return num;
 }
 // recebe texto
function verTexto(resultado){

var num = verNum2(paremeter);        // HERE IS THE PROBLEM
alert("num1: "+num);
 for(i=0; i< num; i++)
      loadNotes(resultado[i]);

因为我正在使用AJAX，所以我需要使用这三个函数，并且我需要返回在verNum2()处分配的num变量，并在verTexto()处使用它.在我使用时，它显然是错误的. -我得到"num1:未定义"，因为我需要传递要返回的参数.

我该如何解决这个问题?

Because I''m using AJAX I need to use this three functions, and I need to return num variable assigned at verNum2(), and use it at verTexto(). As I am using, its obviously wrong. - I get "num1: undefined", because I need to pass the parameter that I want to return.

How can I solve this problem ?

推荐答案

您正在调用verNum2，而没有任何参数，例如:

You are calling verNum2 without any parameters, like this:

var num = verNum2(); 

而且由于您不带参数调用它，因此没有任何内容可分配给num:

And because you called it without a parameter it has nothing to assign to num:

function verNum2(result) {
    var num = result;
    alert("num: "+num);
    return num;
 }

Num是您返回的内容，由于未调用result，因此未分配.

祝你好运！

Num is what you return and that is then unassigned because result was when calling it.

Good luck!

当然这是行不通的.看它.

verNum2使用一个参数，该参数将其分配给局部变量，然后将其返回.在verTextTo中调用它时，您没有提供参数，这意味着将返回NULL.

Of course this doesn''t work. Look at it.

verNum2 takes one parameter which assigns it to a local variable and then returns it. When you are calling it in verTextTo you are not giving a parameter, which means NULL will be returned.

尝试一下，

try this,

function botaoCarregarNotas_VerNum() 
{     
     PageMethods.verNum(verNum2);
}
function botaoCarregarNotas()
{
     PageMethods.carregarNotas(verTexto); 
} 
// aqui é recebido o resultado
function verNum2(result) 
{    
     var num = result;    
     alert("num: "+num);    
     return num; 
} 

// recebe texto
function verTexto(resultado)
{
      var num = botaoCarregarNotas_VerNum();        
      alert("num1: "+num); 
      for(i=0; i<num;>
          loadNotes(resultado[i]);
}

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