Question

我遇到了类似下面的情况。事情发生了，用户需要决定他是否要继续。如果他不这样做，代码就会停止执行。如果他这样做，它将继续。

然而，我不是两次使用相同的代码，而是在顶部的if语句返回false时执行部分（很多代码）。

在VB中我会使用GOTO，但在Javascript中没有相应的东西。

if(true){
    var r = confirm("although this and that... do you still want to continue?");
    if (r == false) {
        break;
    } else { 
        a lot of code
    }
}

有什么想法吗？

Answer 1

制作一个功能

function confirmPop(){
   if(true){
    var r = confirm("although this and that... do you still want to continue?");
    if (r == false) {
        break;
    } else { 
        a lot of code
    }
  }
}

然后致电

confirmPop();

Answer 2

如果我理解正确你有类似的东西

if(booleanValue){
    var r = confirm("although this and that... do you still want to continue?");
    if (r == false) {
        break;
    } else { 
        a lot of code
    }
}else{
    a lot of code (the same as above)
}

在这种情况下，我会定义一个函数，内容为＆＃34;很多代码＆＃34;然后调用该函数两次。喜欢这个

function doALotOfWork(){
    a lot of code
}
if(booleanValue){
    var r = confirm("although this and that... do you still want to continue?");
    if (r == false) {
        break;
    } else { 
        doALotOfWork();
    }
}else{
    doALotOfWork();
}

Answer 3

var r = confirm("although this and that... do you still want to continue?");
// code to execute regardless of the option selected.
if (r) {
    // code to execute only if the user wants to continue.
}

Answer 4

将可恢复逻辑包装到一个函数中并将一个委托（调用方法，例如“很多其他代码”）注入函数...

var aLotOfCode = function () {
  // a lot of code here!
  console.log('a lot of code here!');
};


var confirmation = function (delegateIfRTrue)

  if(true){
    var r = confirm("although this and that... do you still want to continue?");
    if (r == false) {
        break;
    } else { 
        //a lot of code
        delegateIfRTrue();
    }
  }

并使用...

来调用它

confirmation(aLotOfCode);

在JavaScript中使用相同的代码两次

4 个答案: