will convert name of each Java source file in the current directory to lowercase. The curly braces may
contain arbitrary operations to be performed on each element of the list (in example a list of Java
source files.)
11.2.1 Perl Internals
Perl is not exactly an interpreter and it is not exactly a compiler: it is a byte-code compiler. It first
compiles the input source code to an internal representation or byte-code, and then it executes the
operations that the byte-code specifies on a virtual machine.
Comparing with Java’s virtual machine, it is designed to represent an idealized version of a
computer’s ...
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