Module:languages: Difference between revisions

Module:languages (view source)

866 bytes added , 7 August 2024

ਕੋਈ ਸੋਧ ਸਾਰ ਨਹੀਂ

11,796

edits

@@ Line 32: / Line 32: @@
 	local l = export.get_by_code(code)
 	return l[field]
+end
+function export.is_ancestor(language, code)
+	if language.lineage == nil then return false end
+	return language.lineage[code] ~= nil
+end
+function export.get_common_ancestors(a, b)
+	if a.lineage == nil or b.lineage == nil then return {} end
+	local commons = {}
+	for ancestor, _ in pairs(a.lineage) do
+		if b.lineage[ancestor] then
+			table.insert(commons, ancestor)
+		end
+	end
+	return commons
+end
+function export.stage_at_split(a, b)
+	return #export.get_common_ancestors(a, b)
+end -- returns stage at which the two languages diverged as an integer; if not related, returns 0
+function export.common_ancestor(a, b)
+	local ancestors = export.get_common_ancestors(a, b)
+	table.sort(ancestors, function(a, b)
+		local al = export.get_by_code(a).lineage or {}
+		local bl = export.get_by_code(b).lineage or {}
+		return #al > #bl
+	end
+	)
+	return ancestors[1]
 end