# Feature Showcase: Test a Regular Expression with the Rx Toolkit Komodo IDE only

Use the Rx Toolkit to create, analyse and debug regular expressions in a program.

Before you start: Open the rx_sample.pl file contained in the sample project.

From the `while (<DATA>)` block, select the regular expression between the "/" characters.
In the Toolbar, click the Regular Expression Toolkit button.
Clear the previous contents by clicking Help|Load Sample Regex and Search Text. Copy the selected expression to the Regular Expression field.
In the Regular Expression pane, add an additional "`:(.*)`" and click Match All.
The Match Results pane now displays three groups for each regular expression match.