Info Catalog gawk: Pattern Overview gawk: Expression Patterns

gawk: Regexp Patterns

 
 7.1.1 Regular Expressions as Patterns
 -------------------------------------
 
 Regular expressions are one of the first kinds of patterns presented in
 this book.  This kind of pattern is simply a regexp constant in the
 pattern part of a rule.  Its meaning is '$0 ~ /PATTERN/'.  The pattern
 matches when the input record matches the regexp.  For example:
 
      /foo|bar|baz/  { buzzwords++ }
      END            { print buzzwords, "buzzwords seen" }
 

Info Catalog gawk: Pattern Overview gawk: Expression Patterns