Hi,

I habe a binary file which I load into a byte array. I have to change some
byte to another, for e.g. if byte = 101 then must be 122. It is about 100
such changes. I can make 100 "if" or 100 "select case".
is there any other better method to do it (some structure data in which I
could keep my dictionary like array list, hashtable, stack and to which it
would be easy to imput my dictionary)

Thanks.

Przemo

Hello Przemo,

I don't quite understand the last part, where you make a suggestion
yourself - it's possible that you're on a good track there.
My suggestion would be to use a mapping structure, in this case an array
might be good as you have a pretty restricted value range. Somewhat like
this:

    byte[] mapping = new byte[256] {
        0, 1, 2, 3, 11, ... // list all 256 mapped values
    };

And then you could map like this:

    byte originalValue = ...;
    byte newValue = mapping[originalValue];

For more complex cases (i.e. when there are a lot more than 256 values, or
when the value range isn't clear at all), you could instead use a
Dictionary, like this:

    Dictionary<int, int> mapping = new Dictionary<int, int>( );
    mapping[5] = 11;

    int originalValue = ...;
    int newValue = mapping.ContainsKey(originalValue) ?
        mapping[originalValue] : originalValue;


                Oliver Sturm

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