Exercise: Tk - a GUI for a grep-like application

Exercise: Tk - a GUI for a grep-like application

❮ Exercise: Tk - Implement Master Mind board Solution: Tk - Calculator one line ❯

The GUI should accept:

A filename, a wilde-card expression, maybe a dirctory name (and then a flag to recurse or not).
A regular expression.
Various flags for regex.

Then it should display the lines that match the expression in the selected files.