Generate all possible combinations from multiple arrays (C#/VB.NET) [closed]

Answer 1

First method

You can use Nested For Loops

for (int i=0; i < Arr1.Length ; i++)
{  
  for (int j=0; i < Arr2.Length ; j++)
  {  
     like this..............
  }  
}  

Second Method

C# - Most efficient way to iterate through multiple arrays/list

Answer 2

Based on article by Eric Lippert

void Main()
{
    var set1 = new object[]{'a', 'b', 'c'};
    var set2 = new object[]{1,2,};
    var set3 = new object[]{'x', 'y', 'z'};

    string.Join(", ", new[] {set1, set2, set3}.CartesianProduct().Select(item => item.ToArray()).Select(item => string.Format("({0},{1},{2})", item[0], item[1], item[2]))).Dump();
}


public static class CartesianProductContainer
{
    public static IEnumerable<IEnumerable<T>> CartesianProduct<T>(this IEnumerable<IEnumerable<T>> sequences) 
    { 
        IEnumerable<IEnumerable<T>> emptyProduct = new[] { Enumerable.Empty<T>() }; 
        return sequences.Aggregate( 
            emptyProduct, 
            (accumulator, sequence) => 
                from accseq in accumulator 
                from item in sequence 
                select accseq.Concat(new[] {item})); 
    }
}

The output:

(a,1,x), (a,1,y), (a,1,z), (a,2,x), (a,2,y), (a,2,z), (b,1,x), (b,1,y), (b,1,z), (b,2,x), (b,2,y), (b,2,z), (c,1,x), (c,1,y), (c,1,z), (c,2,x), (c,2,y), (c,2,z)