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Archive for September 2008

Visual Studio 2008 color settings

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I recently switched to “dark” vs2008 color scheme since it is easy on eyes.

I started with RagnaRok color scheme created by Tomas Restrepo and modified it to my convenience.

You can download the modified version from here: RagnaRok-modified.

Written by Vivek Unune

September 27, 2008 at 9:14 pm

Posted in Misc.

Tagged with ,

RotateString v2.0

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I added the ability to rotate string right or left. Here is the code:


public enum Direction { Right, Left }

string rotateString(string source, int rotationCount, Direction direction)
{
    if (String.IsNullOrEmpty(source) || rotationCount <= 0)
        return source;

    int pivot = 0;
    List<int> delimiterLocations = new List<int>();
    char[] sourceChars = new char[source.Length];

    char temp;
    // Reverse the whole string and
    // save the dilimiter locations
    for (int i = 0; i < source.Length; i++)
    {
        sourceChars[source.Length - i - 1] = source[i];

        if (source[i] == ' ')
            delimiterLocations.Add(source.Length - i - 1);
    }

    // calculate neededDelimiters mod wordCount
    // (assume words = delimiterCount + 1)
    pivot = rotationCount % delimiterLocations.Count;

    if (pivot > 0)
    {
        if (direction == Direction.Left)
            pivot = delimiterLocations.Count - pivot;

        pivot = delimiterLocations[delimiterLocations.Count - pivot];
    }
    else
    { return source; }

    // reverse the first part
    for (int i = 0, j = pivot - 1; i <= j; i++, j--)
    {
        temp = sourceChars[i];
        sourceChars[i] = sourceChars[j];
        sourceChars[j] = temp;
    }

    // reverse the second part
    for (int i = pivot + 1, j = sourceChars.Length - 1;
         i <= j; i++, j--)
    {
        temp = sourceChars[i];
        sourceChars[i] = sourceChars[j];
        sourceChars[j] = temp;
    }

    return new string(sourceChars);
}

Written by Vivek Unune

September 27, 2008 at 4:46 pm

Posted in .NET

Tagged with ,

StackOverflow – RotateString

with 4 comments

Someone asked the following question on StackOverflow. Before I could post my answer, it was removed. Hmm, so He/She tried to abuse StackOverflow! Anyway, I found that question interesting.

The question was to write a function to rotate a string of words. Words are separated by ‘ ‘ (space). In the result string, the words should remain human readable. The function will also take an integer argument that will specify number of words to rotate.

example:

string source = “A quick brown fox jumps over the lazy dog.”

rotateString(source, 3);

Should give:

the lazy dog. A quick brown fox jumps over

Here is my solution:

static string rotateString(string source, int rotationCount)
{
    if (String.IsNullOrEmpty(source) || rotationCount <= 0)
        return source;

    int pivot = 0;
    List<int> delimiterLocations = new List<int>();
    char[] sourceChars = new char[source.Length];

    char temp;
    // Reverse the whole string and
    // save the dilimiter locations
    for (int i = 0; i < source.Length; i++)
    {
        sourceChars[source.Length - i - 1] = source[i];

        if (delimiterLocations.Count < rotationCount && source[i] == ' ')
            delimiterLocations.Add(source.Length - i - 1);

    }

    // calculate neededDelimiters mod wordCount
    // (assume words = delimiterCount + 1)
    pivot = rotationCount % (delimiterLocations.Count + 1);

    if (pivot > 0)
        pivot = delimiterLocations[pivot-1];
    else
        return source;

    // reverse the first part
    for (int i = 0, j = pivot - 1; i <= j; i++, j--)
    {
        temp = sourceChars[i];
        sourceChars[i] = sourceChars[j];
        sourceChars[j] = temp;
    }

    // reverse the second part
    for (int i = pivot + 1, j = sourceChars.Length - 1;
         i <= j; i++, j--)
    {
        temp = sourceChars[i];
        sourceChars[i] = sourceChars[j];
        sourceChars[j] = temp;
    }

    return new string(sourceChars);
}

Written by Vivek Unune

September 25, 2008 at 5:04 am

Posted in .NET

Tagged with ,