Built-in Library
Ruby’s built-in library provides you with a rich set of classes
that form the foundation for your Ruby programs. There are classes
for manipulating text (String
), operating system
services and abstractions (IO
,
File
, Process
, etc.), numbers
(Integer
, Fixnum
, etc.), and so
on.
Using these basic building blocks, you can build powerful Ruby programs. But wait, in the next chapter, I lay out the Standard Library, which extends Ruby’s flexibility.
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