Create a single regular expression that matches a string representing a comma separated list of variable names such as: hello, get_max, sum3Additional notes:A variable name consists of letters, digits, and underscores but cannot start with a digit.There is exactly one space after every comma. No other spaces are allowed.Commas and spaces are not allowed before the first name and after the last name.An empty string is considered a match.It is not a match if the list is not properly formed or if one of the variable names is invalid.

2) ^(0? [1-9]|1[0-2]):[0-5] [0-9] $\s0? implies [1-9] is followed by 0 (zero or one occurrence). The…

Answered: Create a single regular expression that…

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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Create a single regular expression that matches a string representing a comma separated list of variable names such as: hello, get_max, sum3
Additional notes:
- A variable name consists of letters, digits, and underscores but cannot start with a digit.
- There is exactly one space after every comma. No other spaces are allowed.
- Commas and spaces are not allowed before the first name and after the last name.
- An empty string is considered a match.
- It is not a match if the list is not properly formed or if one of the variable names is invalid.

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