8th way to explore the world

	using System;
	using System.Collections.Generic;
	using System.Globalization;
	using System.Linq;
	using System.Text;

	static string CreateLocaleTable(string cultureName)
	{
	var paths = CultureInfo.GetCultures(CultureTypes.AllCultures)
	.Where(x => x.Name.StartsWith(cultureName))
	.Select(x => (culture: x, path: GetParent(x)))
	.ToArray();

	var length = paths.Max(x => x.path.Length);

	var lines = new StringBuilder()
	.AppendLine(string.Join("\|", Enumerable.Repeat("<--", length - 1).Prepend(null).Prepend(null).Append(null).Append(null)))
	.AppendLine(string.Join("\|", Enumerable.Repeat("---", length + 1).Prepend(null).Append(null)));

	var buffer = paths.Select(x => (x.culture, path: x.path.Concat(new CultureInfo[length - 1]).Take(length).ToArray()))
	.OrderBy(x => x.path[0].Name);

	for (int i = 1; i < length; i++)
	{
	int index = i;
	buffer = buffer.ThenBy(x => x.path[index]?.Name);
	}

	foreach (var (culture, path) in buffer)
	{
	lines.AppendLine(string.Join("\|", path.Select(x => x?.Name).Append(culture.DisplayName).Prepend(null).Append(null)));
	}

	return lines.ToString();

	static CultureInfo[] GetParent(CultureInfo c, List<CultureInfo> list = null)
	{
	list ??= new List<CultureInfo>();
	list.Insert(0, c);

	return (c.Parent == CultureInfo.InvariantCulture)
	? list.ToArray()
	: GetParent(c.Parent, list);
	}
	}

2021/01/31