The Refragmentation

In this essay, Paul Graham discusses regular expressions, a powerful tool for manipulating text. He begins by explaining what regular expressions are and highlights their usefulness in various programming tasks. Graham then delves into the history and evolution of regular expressions, tracing their origins back to formal language theory. He explores the syntax and functionality of regular expressions, providing examples and explanations along the way. He also touches on the limitations of regular expressions and gives advice on when and how to use them effectively. Overall, this essay provides a comprehensive overview of regular expressions, making it a valuable resource for programmers and anyone interested in text manipulation.