Ruby Libraries Important for Rails
summary
Covers learning the Ruby standard library by doing actual experiments not platitudes. Uses IRB live coding, RubyDoc and Sublime Text to discover surprising behaviors like Array.new(3) producing [nil,nil,nil], Array.new(2, obj) sharing the object, multiplication and join aliases, and that map lives in Enumerable. Builds small RSpec examples that become RSpec executable documentation, runs them green with --format documentation, and then breaks into a hands‑on workshop to dig deeper.
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chapters (9)
- 0:00Start
- 3:09Regular Expression
- 4:11User Spec
- 9:06Standard Library Documentation
- 10:09Array Intersection
- 22:04Set Intersection
- 23:44Array Concate
- 25:54Ruby Doc
- 29:45Expect Method
