using IEnumerator to removing items 2

[d00ape]

I want to remove some items from an ArrayList. Can I do that using a foreach(…)- loop an IEnumerator like this.

foreach(string s in arraylist)
{
if (s == “del”)
{
// Here I want to remove the item from arraylist…
}
}

Any ideas how to solve this without creating a new ArrayList and add items I want to save. Feels like that solution will bee to time consuming…

All tips are welcomed!.

 

[B00gyeMan]

int iIndex = 0;

while( iIndex < arrayList.Count)
{
 if( //you need to remove this item)
 {
  arrayList.RemoveAt( iIndex);
 }
 else
 {
  iIndex++;
 }
}

And it is not time consuming

 

[chiph]

You can't remove or add items to an Arraylist inside a foreach loop (includes using IEnumerable, too). This is because doing the add/remove will alter the contents of the collection, which invalidates your IEnumerator.

You'll need to use either a traditional for loop or a while loop.

Chip H.


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