How to construct a regular expression correctly?

Question

JavaScript

How to properly write a JavaScript regular expression for match so that you can parse a string, say, folder1.subfolder.element , into an array ['folder1', 'subfolder', 'element'] .
It is necessary to match, not split.

Answer 1

str.match(/([A-Za-z])*\w+/g)
and how did split not suit you?

Answer 2

mysql_query("SET NAMES 'utf8'"); 
mysql_query("SET CHARACTER SET 'utf8'");
mysql_query("SET SESSION collation_connection = 'utf8_general_ci'");