/// <summary>
/// Converts a generic collection of <see cref="ValueType"/>
/// to a <see cref="string"/> delimited by the value
/// of the <paramref name="separator"/> parameter,
/// by calling the <see cref="ValueType.ToString()"/>
/// method on each item in the source collection,
/// and removing any duplicates.
/// </summary>
/// <param name="collection">
/// A generic collection of <see cref="ValueType"/> items.
/// </param>
/// <param name="separator">
/// A string delimiter to use instead of a comma.
/// </param>
/// <param name="removeDuplicates">
/// Whether to remove duplicate items in the array returned.
/// Parameter is optional, default value is <c>false</c>.
/// </param>
/// <typeparam name="T">
/// The generic type of <paramref name="collection"/>,
/// derived from <see cref="ValueType"/>.
/// </typeparam>
/// <returns>
/// A <paramref name="separator"/>-delimited string.
/// </returns>
public static string ToDelimitedString <T>(
this IEnumerable <T> collection,
[NotNull] string separator,
bool removeDuplicates = DefaultRemoveDuplicates)
where T : struct
{
Contract.Requires <ArgumentException>(!ConvertStrings.IsNullOrWhiteSpace(separator));
return(collection.ToDelimitedString(
null, separator, removeDuplicates));
}
/// <summary>
/// Converts a generic collection of <see cref="ValueType"/>
/// to a <see cref="string"/> delimited by the value
/// of the <paramref name="separator"/> parameter,
/// by calling the <paramref name="toStringMethod"/>
/// delegate on each item in the source collection,
/// and optionally removing any duplicates.
/// </summary>
/// <param name="collection">
/// A generic collection of <see cref="ValueType"/> items.
/// </param>
/// <param name="toStringMethod">
/// A delegate function which accepts a <typeparamref name="T"/>
/// value and returns a string. Pass this parameter if a custom
/// format string is needed. If not specified, uses the default
/// <see cref="ValueType.ToString"/> method.
/// </param>
/// <param name="separator">
/// A string delimiter to use instead of a comma.
/// </param>
/// <param name="removeDuplicates">
/// Whether to remove duplicate items in the array returned.
/// Parameter is optional, default value is <c>false</c>.
/// </param>
/// <typeparam name="T">
/// The generic type of <paramref name="collection"/>,
/// derived from <see cref="ValueType"/>.
/// </typeparam>
/// <returns>
/// A <paramref name="separator"/>-delimited string.
/// </returns>
public static string ToDelimitedString <T>(
this IEnumerable <T> collection,
Func <T, string> toStringMethod,
[NotNull] string separator,
bool removeDuplicates = DefaultRemoveDuplicates)
where T : struct
{
Contract.Requires <ArgumentException>(!ConvertStrings.IsNullOrWhiteSpace(separator));
return(string.Join(
separator, collection.ToStringArray(toStringMethod, removeDuplicates)));
}