The power of regular expression – programming in sed, awk and perl

In this demonstration we show small regular expression programs using the three tools sed, awk and perl that process a file containing BNF to make a set of commands for the flex tool to build a lexical analyser.

This video supports students attending the University of Hull module 600087 labs.

00:00 Introduction
01:24 typing the sed command
03:54 typing the awk command
04:41 typing the perl command