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C# - foreach loop within while loop - break out of foreach and continue on the while loop right away?

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.
}

I'm a bit stuck on how to do this.


Update: I fixed the question. I left out the fact that I need to process other stuff if I don't call a continue; on the while loop.

Sorry, I didn't realize I used the word "something" twice.

like image 320
myermian Avatar asked Jul 15 '11 16:07

myermian


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2 Answers

I would rewrite this:

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();
}

as

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();
   }
}
like image 176
Eric Lippert Avatar answered Nov 04 '22 03:11

Eric Lippert


while (something)
{
   foreach (var x in xs)
   {
       if (something is true)
       {
           //Break out of this foreach
           //AND "continue;" on the while loop.
           break;
       }
   }
}
like image 21
adrianos Avatar answered Nov 04 '22 03:11

adrianos