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Related Images for Math Patterns Grade 4
I have a text file full of data and i want to match and replace patterns of "item" and "catalog number" that are in the file.
The match pattern is the main component of a regular expression, and is therefore rather complex.
The /g option is used to match all the patterns in the given string (here, $_, but you can use the =~ operator to match somewhere else).
In the previous modules of this book we introduced and then made occasional reference to pattern matching, pointing out common situations in which it is involved.