How can I out a array with trimming a part of it on each line in console

Question

1.00/5 (2 votes)

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I have an array and i want output as below. Need this in c# implementation.

input parameter:
array = {1, 2, 3, 4, 5, 6, 7}
int indexclip = 3, int lineclip = 5

output:
123
456
712
345
678

I am trying and attached code doesn't work, need a solution.

Thank you

What I have tried:

public static void PrintLine(int[] a, int b, int c)
        {
            int startindex = 0, endindex = 0, line = 0;
            for (int i = 0; i < c; i++)
            {
                if (line <= c)
                {
                    for (int j = startindex; j < b; j++)
                    {
                        Console.Write(string.Join(" ", a[j]));
                    }
                    startindex = b;

                    Console.WriteLine();
                    line++;
                    for (int j = startindex; j < a.Length; j++)
                    {
                        Console.Write(string.Join(" ", a[j]));
                    }
                    endindex = startindex - (b - 1);
                    for (int j = 0; j < endindex; j++)
                    {
                        Console.Write(string.Join(" ", a[j]));
                    }
                    startindex = endindex;
                    Console.WriteLine();
                    line++;
                }
            }
        }

Posted 27-Jul-21 5:29am

Ajeet S 2021

Updated 27-Jul-21 7:50am

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Comments

BillWoodruff 29-Jul-21 6:40am

678 makes no sense.

712 suggest wrapping around

why not 234, 567, 671 ?

3 solutions

Solution 1

If you are familiar with Linq you could use something like this.

C#

int[] array = new int[] { 0, 1, 2, 3, 4, 5, 6,7 };
int index = 0;
int skipCount = 3;
while (index < array.Length)
  {
   var batch = array.Skip(index).Take(skipCount).ToArray();
   if (batch.Length != skipCount) break;
   foreach(var n in batch)
   {
    Console.Write(n);
   }
    Console.WriteLine();
    index += skipCount;
  }

On reflection, this solution is over-engineered for the task at hand. It is designed to split an array into batches so that they may be processed asynchronously by different threads.

Posted 27-Jul-21 6:29am

George Swan

Updated 27-Jul-21 20:54pm

v3

Comments

Ajeet S 2021 27-Jul-21 12:37pm

above code output:
123
456
78

even my code too does this. but how to skip iteration after it ends the length.
it should continue 781 and then 234 ...

George Swan 27-Jul-21 13:02pm

I have modified the code so that only batches of size skipCount are output. But I think Griff's solution is better!

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OriginalGriff · Accepted Answer · 2021-07-27T06:47:00

Assuming that the "8" in your solution is a typo (because it only appears on teh final line and isn't in the input all you need is a modulus operator:

C#

int[] input = { 1, 2, 3, 4, 5, 6, 7 };
int index = 0;
int lineLength = 3;
int lineCount = 5;
for (int y = 0; y < lineCount; y++)
    {
    for (int x = 0; x < lineLength; x++)
        {
        Console.Write(input[index++]);
        index %= input.Length;
        }
    Console.WriteLine();
    }

Gerry Schmitz · Accepted Answer · 2021-07-27T07:50:00

int[] array = new int[] { 1, 2, 3, 4, 5, 6, 7 };
int indexClip = 3;
int lineClip = 5;
Queue<int> q = new Queue<int>();

for ( int i = 1; i <= lineClip; i++ ) {

   for ( int j = 1; j <= indexClip; j++ ) {

      if ( q.Count == 0 ) { q = new Queue<int>( array ); }

      Console.Write( $"{q.Dequeue()}" );

   }  // end for.

   Console.WriteLine();

}  // end for.

How can I out a array with trimming a part of it on each line in console

3 solutions

Solution 2

Solution 3

Solution 1

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