//

// https://github.com/ServiceStack/ServiceStack.Text

// ServiceStack.Text: .NET C# POCO JSON, JSV and CSV Text Serializers.

//

// Authors:

// Demis Bellot (demis.bellot@gmail.com)

//

// Copyright 2012 ServiceStack Ltd.

//

// Licensed under the same terms of ServiceStack: new BSD license.

//

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using ServiceStack.Text.Common;

namespace ServiceStack.Text

{

public static class ListExtensions

{

public static string Join<T>(this IEnumerable<T> values)

{

return Join(values, JsWriter.ItemSeperatorString);

}

public static string Join<T>(this IEnumerable<T> values, string seperator)

{

var sb = new StringBuilder();

foreach (var value in values)

{

if (sb.Length > 0)

sb.Append(seperator);

sb.Append(value);

}

return sb.ToString();

}

public static bool IsNullOrEmpty<T>(this List<T> list)

{

return list == null || list.Count == 0;

}

//TODO: make it work

public static IEnumerable<TFrom> SafeWhere<TFrom>(this List<TFrom> list, Func<TFrom, bool> predicate)

{

return list.Where(predicate);

}

public static int NullableCount<T>(this List<T> list)

{

return list == null ? 0 : list.Count;

}

public static void AddIfNotExists<T>(this List<T> list, T item)

{

if (!list.Contains(item))

list.Add(item);

}

}

}