c# - C# - while 循环中的 foreach 循环 - 跳出 foreach 并立即继续 while 循环？

Question

while (foo() == true)
{
   foreach (var x in xs)
   {
       if (bar(x) == true)
       {
           //"break;" out of this foreach
           //AND "continue;" on the while loop.
       }
   }

   //If I didn't continue, do other stuff.
}

我有点坚持如何做到这一点。

---

更新：我解决了这个问题。如果我不在continue;while 循环上调用 a，我忽略了我需要处理其他东西的事实。

抱歉，我没有意识到我用了两次“某事”这个词。

Answer 1

我会重写这个：

while (foo() == true)
{
   foreach (var x in xs)
   {
       if (bar(x) == true)
       {
           //"break;" out of this foreach
           //AND "continue;" on the while loop.
       }
   }

   //If I didn't continue, do other stuff.
   DoStuff();
}

作为

while (foo()) // eliminate redundant comparison to "true".
{
   // Eliminate unnecessary loop; the loop is just 
   // for checking to see if any member of xs matches predicate bar, so
   // just see if any member of xs matches predicate bar!
   if (!xs.Any(bar))        
   {
       DoStuff();
   }
}

Answer 2

while (something)
{
   foreach (var x in xs)
   {
       if (something is true)
       {
           //Break out of this foreach
           //AND "continue;" on the while loop.
           break;
       }
   }
}

Answer 3

如果我理解正确，您可以在此处使用 LINQ Any / All谓词：

while (something)
{
    // You can also write this with the Enumerable.All method
   if(!xs.Any(x => somePredicate(x))
   {
      // Place code meant for the "If I didn't continue, do other stuff."
      // block here.
   }
}

Answer 4

这应该满足您的要求：

while (something)
{   
    bool doContinue = false;

    foreach (var x in xs)   
    {       
        if (something is true)       
        {           
            //Break out of this foreach           
            //AND "continue;" on the while loop.          
            doContinue = true; 
            break;       
        }   
    }

    if (doContinue)
        continue;

    // Additional items.
}

一旦您需要break通过嵌套结构进行传播，这种代码就会经常发生。是否是代码异味还有待商榷:-)

Answer 5

while (something)
{
   foreach (var x in xs)
   {
       if (something is true)
       {
           break;
       }
   }
}

但是，这两个值不总是等于 true 吗？

Answer 6

所以你想打破后继续？

while (something)
{
    bool hit = false;

    foreach (var x in xs)
    {
        if (something is true)
        {
            hit = true;
            break;
        }
    }

    if(hit)
        continue;
}