Everything You Ever Wanted to Know About Regular Expressions in NCM But Were Afraid to Ask
Regular expressions are used in many places in the Network Configuration Manager (NCM). Because of technical and historical reasons, NCM uses a few different flavors of regular expressions for different functionality. In this post, I would like to explain the differences and provide references to more detailed documentation.
What Are Regular Expressions
Informally, a regular expression is a search pattern (sequence of characters) used mainly for string pattern matching and string finding. The term originated in formal language theory where regular expressions are exactly defined and related to other concepts of the same power (regular languages, finite automata, etc.). Although the current tools still use the term ‘regular expression’ (regex), it would be more precise to call them something like ‘search patterns’; the expressive power of the search engine is, in fact, often much higher than that of the original regular expressions. (Many modern tools support patterns that are even…
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