Programming Ruby 3.3

Part 5Ruby Library Reference

Ruby gets much of its functionality from its extensive library. That library is sometimes described as having two parts: the "core," which is part of Ruby and is included as part of every Ruby program, and the "standard library," which is shipped with Ruby but must be explictly required in code to be used.

In this part, we cover a curated list of the most important classes and their most useful methods in both the core and the standard library. We didn’t separate the two. If a class in this list needs to be explicitly required, we note that as part of the description of that class. Note that we tried to keep related functionality together, so when you browse for one method, you might find another one that fits ...