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Iterate a dictionnary to change values

Hello EE,

I need to update many values of a Dictionnary .. to do that, I was thinking of iterating it but then realized I cannot change value if I do this.

So I found a way like this :

        For x As Integer = 0 To finalDict2.Count - 1
            Dim test As String = finalDict2.ElementAt(x).Key
            Dim testV As Integer = finalDict2.ElementAt(x).Value

            If a.BinarySearch(test) < 0 Then
                finalDict2.Remove(test)
                finalDict2.Add(test, testV + 1)
            Else
                finalDict2.Remove(test)
                finalDict2.Add(test, 0)
            End If
        Next

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Overall what I do is, if a value matches a variable, I want to put his dicitonnary value back to 0
OR if does not match, i want to increase its value by 1

so to eithe rput to 0 or do + 1, I remove and re-add in dictionnary

but all this takes to much time... im sure its not efficient..
any better idea ?

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it_saige

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p_davis

also... with a for or foreach you might want to use local variables outside the loop i.e.
Dim test As String
Dim testV As Integer

you can also use linq to to get an index of an item that has the key/value that you want

you can iterate/enumerate on a keyvaluepair btw

p_davis

with c# anyway... i assume there is something similar with vb

Ark

Why do you need removing and adding values with same key? You can simly change value:

For Each key In finalDict2.Keys
    If a.BinarySearch(key) < 0 Then
        finalDict2(key)+= 1
    Else
        finalDict2(key) = 0
    End If
Next

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