New load lib to calculate disk usage in a specified directory (w/pattern)

Use like this:
var diskusage = load({}, "diskusage.js");
print(diskusage.get("/*.txt"));

exec/load/diskusage.js

+// Calculate disk usage in specified directory/pattern
+
+"use strict";
+
+function get(dir)
+{
+	var used = 0;
+	var list = directory(dir);
+	for(var i = 0; i < list.length; i++) {
+		if(!file_isdir(list[i]))
+			used += file_size(list[i]);
+	}
+	return used;
+}
+
+this;
\ No newline at end of file