In order to read and process a file, you do not need a module. As a starting point it is probably good, if you would read the documentation of split, grep and substr and find out under which circumstances they are useful. Do you have any particular application in mind? If not, search PerlMonks to find 1000s of examples for the usage of these functions!

In reply to Re^3: regular expression function: grep, split, substr OR NO need? by hdb
in thread regular expression function: grep, split, substr OR NO need? by virtuemart2

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