Module:Feature: Difference between revisions

@@ Line 328: / Line 328: @@
      end
      return false
+end
+-- nullable number
+function lib.toNullableNumber(str)
+	if str == nil then
+		return nil
+	end
+	return tonumber(str)
+end
+-- array slice
+function lib.arraySlice(tbl, first, last)
+  if first ~= nil and first < 0 then
+    first = #tbl + 1 + first
+  end
+  if last ~= nil and last < 0 then
+    last = #tbl + last
+  end
+  local sliced = {}
+  for i = first or 1, last or #tbl, 1 do
+    sliced[#sliced+1] = tbl[i]
+  end
+  return sliced
+end
+--sanitize file name
+--removes invalid characters for file name
+function lib.sanitizeFileName(str)
+	str = string.gsub(str, "[:*?\"<>|]", "")
+	str = string.gsub(str, "[/\\]", " ")
+	return str
 end
 return lib