Write the regular expression that can match only complete words which have repeating letters. Assume the words contain only lower-case letters. Example words that would match are pizza, smooth, and hawaii. The correct solution must implement the back-reference expression. For example, no credit will be given for solutions with regular expressions having 26 or statements. There is only one word per line and partial words cannot be matched.

Write the regular expression that can match only complete words which have repeating letters. Assume the words contain only lower-case letters. Example words that would match are pizza, smooth, and hawaii. The correct solution must implement the back-reference expression. For example, no credit will be given for solutions with regular expressions having 26 or statements. There is only one word per line and partial words cannot be matched.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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