August 2000
Intermediate to advanced
800 pages
13h 15m
English
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Defining Regular Expressions
At the highest level, a regular expression is one or more branches separated by the vertical bar character (|). This character is considered to have the properties of a logical-OR. Any of the branches could match with an evaluated string. Table 16-1 provides a few examples.
Each branch contains one or more atoms. These atoms may be followed by characters that modify the number of times the atom may be matched in succession. An asterisk (*) means the atom can match any number of times. A plus sign (+) means the atom must match at least once. A question mark (?) signifies that the atom may match once or not at all.
Alternatively, the atom may be bound, which means it is followed by curly braces, { and }, that contain ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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