LSB from array of bytes C#

Question

I need to select from an array of bytes an array of least significant bits into BitArray. I have code for searching lsb. But I don't know how add this array to BitArray

private static bool GetBit(byte b)
        {
            return (b & 1) != 0;
        }

What do you mean by "add this array to BitArray"? It's unclear what you're asking here. It would really help if you'd give a complete example with expected output, with a "not sure what to do here" part. — Jon Skeet, May 21 '14 at 09:45

score 0 · Answer 1 · answered May 21 '14 at 09:52

0

    static void Main(string[] args)
    {
        byte[] bytes = new byte[] { 5, 7, 8, 1, 3, 5, 6, 1, 0 };
        byte[] b = bytes.Where(q => GetBit(q) == true).ToArray();
        BitArray bitArray = new BitArray(b);            
        Console.Read();
    }

    private static bool GetBit(byte b)
    {
        return (b & 1) != 0;
    }

answered May 21 '14 at 09:52

user3598321

105
6

1

Please add some kind of explanation to your code. Your `Where` clause can also be simplified to `Where(GetBit)`. – user703016 May 21 '14 at 09:54

Hybris95 · Accepted Answer · 2014-05-21T11:58:16.090

So first I would convert it to a bool array and then create the BitArray from this bool array :

static void Main(String[] args)
{
    byte[] byteArray = new byte[] { 1, 2, 3, 4, 5, 6 };
    BitArray bitArray = transform(byteArray);
}

private static bool GetBit(byte b)
{
    return (b & 1) != 0;
}

private static BitArray transform(byte[] byteArray)
{
    bool[] boolArray = new bool[byteArray.Length];
    for(int i = 0; i < byteArray.Length; i++)
    {
        boolArray[i] = GetBit(byteArray[i]);
    }
    return new BitArray(boolArray);
}

Edit:
Here is the solution with an array of arrays :

static void Main(String[] args)
{
    byte[][] byteArrays = new byte[2][];
    byteArrays[0] = new byte[] { 1, 2, 3, 4, 5, 6 };
    byteArrays[1] = new byte[] { 1, 2, 3, 4, 5, 6 };
    BitArray[] bitArrays = new BitArray[byteArrays.Length];
    for(int i = 0; i < byteArrays.Length; i++)
    {
        byte[] byteArray = byteArrays[i];
        bitArrays[i] = transform(byteArray);
    }
}

private static bool GetBit(byte b)
{
    return (b & 1) != 0;
}

private static BitArray transform(byte[] byteArray)
{
    bool[] boolArray = new bool[byteArray.Length];
    for(int i = 0; i < byteArray.Length; i++)
    {
        boolArray[i] = GetBit(byteArray[i]);
    }
    return new BitArray(boolArray);
}

thank you very much. I am sorry, but if i have such array byte[][], what i need change in this code? — StacyS, May 21 '14 at 11:12

LSB from array of bytes C#

2 Answers2