using System;

using System.Collections.Generic;

using System.Runtime.CompilerServices;

using System.Text;

using NumSharp.Backends;

using NumSharp.Backends.Unmanaged;

namespace NumSharp

{

public static partial class np

{

/// <summary>

/// Create a vector ndarray of type <see cref="string"/>.

/// Encode string array.

/// format: [numOfRow lenOfRow1 lenOfRow2 contents]

/// sample: [2 2 4 aacccc]

/// </summary>

/// <param name="strArray"></param>

/// <returns></returns>

[MethodImpl(MethodImplOptions.AggressiveInlining)]

public static NDArray array(string[] strArray)

{

if (strArray == null)

throw new ArgumentNullException(nameof(strArray));

if (strArray.Length == 0)

return new NDArray(NPTypeCode.String, 0);

// convert to bytes

string meta = $"{strArray.Length}";

foreach (var str in strArray)

meta += $" {str.Length}";

meta += $":{string.Join("", strArray)}";

return new NDArray(meta.ToCharArray());

}

}

}