Unix Write down the extended regular expression for following questions. E.g. Social security number in the format of 999-99-9999. Answer: [0-9]{3}-[0-9]{2}-[0-9]{4} 1) Valid URL beginning with “http://” and ending with ".edu" (e.g. http://cs.gsu.edu , http://gsu.edu ) 2) Non-negative integers. (e.g. 0, +1, 3320) 3) A valid absolute pathname in Unix (e.g. /home/ylong4, /test/try.c) 4) Identifiers which can be between 1 and 10 character long, must starting with a letter or an underscore. The following characters can be letters or underscores or digits. (e.g. number, _name1, isOK). 5) Phone number in any of the following format: 9999999999,999- 9999999, (999)-999-9999. (Note: all of these formats should be matched by a single regular expression)
Unix Write down the extended regular expression for following questions. E.g. Social security number in the format of 999-99-9999. Answer: [0-9]{3}-[0-9]{2}-[0-9]{4} 1) Valid URL beginning with “http://” and ending with ".edu" (e.g. http://cs.gsu.edu , http://gsu.edu ) 2) Non-negative integers. (e.g. 0, +1, 3320) 3) A valid absolute pathname in Unix (e.g. /home/ylong4, /test/try.c) 4) Identifiers which can be between 1 and 10 character long, must starting with a letter or an underscore. The following characters can be letters or underscores or digits. (e.g. number, _name1, isOK). 5) Phone number in any of the following format: 9999999999,999- 9999999, (999)-999-9999. (Note: all of these formats should be matched by a single regular expression)
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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Unix
Write down the extended regular expression for following questions.
E.g. Social security number in the format of 999-99-9999.
Answer: [0-9]{3}-[0-9]{2}-[0-9]{4}
1) Valid URL beginning with “http://” and ending with ".edu" (e.g.
http://cs.gsu.edu , http://gsu.edu )
2) Non-negative integers. (e.g. 0, +1, 3320)
3) A valid absolute pathname in Unix (e.g. /home/ylong4, /test/try.c)
4) Identifiers which can be between 1 and 10 character long, must
starting with a letter or an underscore. The following characters can be
letters or underscores or digits. (e.g. number, _name1, isOK).
5) Phone number in any of the following format: 9999999999,999-
9999999, (999)-999-9999. (Note: all of these formats should be
matched by a single regular expression)
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