// <copyright file="Util.cs" company="Math.NET">
// Math.NET Numerics, part of the Math.NET Project
// http://numerics.mathdotnet.com
// http://github.com/mathnet/mathnet-numerics
// 
// Copyright (c) 2009-2013 Math.NET
// 
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// obtaining a copy of this software and associated documentation
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// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
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// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
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using System;
using System.Collections.Generic;

namespace MathNet.Numerics.LinearRegression
{
    internal static class Util
    {
        public static Tuple<TU[], TV[]> UnpackSinglePass<TU, TV>(this IEnumerable<Tuple<TU, TV>> samples)
        {
            var u = new List<TU>();
            var v = new List<TV>();

            foreach (var tuple in samples)
            {
                u.Add(tuple.Item1);
                v.Add(tuple.Item2);
            }

            return new Tuple<TU[], TV[]>(u.ToArray(), v.ToArray());
        }
    }
}
