April 2026
Intermediate
399 pages
11h 38m
English
Content preview from AI-Assisted Coding
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8.3 Regular Expressions
Regular expressions are character strings that describe a search pattern for text. In this context, specific rules must be followed that aren’t very intuitive. Various Linux commands such as grep and sed, as well as almost all programming languages, support regular expressions. You can use them to filter out specific information from a text, validate input, or replace recognized patterns with new texts.
AI tools can now help you with what used to be a laborious compilation of regular expressions in the past. Please note, however, that there are several regular expression syntax variants, including Portable Operating System Interface (POSIX), POSIX Extended Regular Expressions (ERE), and Perl Compatible Regular Expressions ...
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