Question:
What is the best way to "reset" a Dictionary<int, bool> type of structure (set all values to true or false). Currently I'm using a ToDictionary() extension method. Is there a way to do this by reusing the current instance?
This code throws an exception:
[TestFixture] public class Sample { [Test] public void SampleTest() { var dictionary = new Dictionary<int, bool>{{1, false}, {2, true}, {3, false}}; foreach (var key in dictionary.Keys) { dictionary[key] = true; } Assert.That(dictionary[3], Is.True); } }
Solution:1
foreach (int key in dictionary.Keys.ToList()) dictionary[key] = true;
Solution:2
As an aside, you might wish to consider using the BitArray class (System.Collections.BitArray). It has a SetAll method that will set all bits to either true or false:
BitArray ba = new BitArray(8); //BitArray with 8 bits ba[3] = true; //set some bits ba[6] = true; ba.SetAll(false); //Clear all If you don't need a dictionary, you might consider this class.
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