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sub
Defining subroutines - video
Functions and Subroutines - video
Passing two arrays to a function
Python Lambda in Perl creating anonymous functions
Returning multiple values or a list from a subroutine in Perl
Subroutines and functions in Perl
The curious case of implicit return
Understanding recursive subroutines - traversing a directory tree
Variable number of parameters in Perl subroutines
Exercise: number guessing in sub - video
Creating subtypes for Moose
Global substitution with regexes - video
substitution - video
String functions: length, lc, uc, index, substr
substr
Don't put & in-front of subroutines in Perl
Lvalue substr - replace part of a string
Deep recursion on subroutine
Perl Regex superpowers - execute code in substitution - what are /e and /ee ?