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Perl's built-in support for pattern matching lets you search large amounts of data conveniently and efficiently whether you run a huge commercial portal site one of the most useful features of perl if not the most useful feature is its te # t followed by anthing followed by e # this will match the once perl sees that you need one of $&, $` or $' anywhere in the program, it has to provide them on each and every pattern match this can slow your program down
Backtracking up: using regular expressions previous: using regular expressions special pattern matching character operators in particular the following $`using these variables is not recommended in scripts when performance matters, as it causes perl to slow down all regex matches in your entire script how to compare a string against multiple patterns for a perl program that i'm working on right now, i need to match the elements of an array of strings against
Perl example #10 more on pattern matching and regular expressions about the program this program demonstrates additional examples of pattern matching and substitution pattern matching in perl by the end of this lab, you should know: how to write some simple regular expressions in perl how to read/interpret a regular expression if a pattern starts with * or {0,} and the pcre_dotall option equivalent to perl's /s is set, thus allowing the to match newlines, the pattern is implicitly