/// <summary>Returns the first value that is not <see langword="null"/>.</summary>
/// <param name="options">The options to use.</param>
/// <param name="values">The values to examine.</param>
/// <returns>The first value that is not <see langword="null"/>. If all values are <see langword="null"/> then
/// <see langword="null"/> is returned.</returns>
public static string Coalesce(StringCoalesceOptions options, IEnumerable <string> values)
{
values = values ?? new string[0];
IEnumerable <string> query;
if (options.HasFlag(StringCoalesceOptions.SkipEmpty))
{
query = values.Where(x => !String.IsNullOrEmpty(x));
}
else
{
query = values.Where(x => x != null);
}
return(query.FirstOrDefault());
}
/// <summary>Returns the first value that is not <see langword="null"/>.</summary>
/// <param name="options">The options to use.</param>
/// <param name="values">The values to examine.</param>
/// <returns>The first value that is not <see langword="null"/>. If all values are <see langword="null"/> then
/// <see langword="null"/> is returned.</returns>
/// <exception cref="ArgumentNullException"><paramref name="values"/> is <see langword="null"/>.</exception>
public static string Coalesce(StringCoalesceOptions options, params string[] values)
{
return(Coalesce(options, values as IEnumerable <string>));
}
