File#rewrite method to safely write a tempfile then move it over an existing file

Geometry modules with strong types, e.g. a vector with width, height, depth.

Use the Google Maps API to geocode an address to a latitude and longitude

HashMore class to create a recursive hash

HTTP Status Codes as constants, such as Net::HTTP::Status::OK = 200

Integer#map method to run a block multiple times

Tool to parse the first bytes of a file and compare it to a list of known mime types.

Markdown general purpose classes

Generate a Markdown table of contents via headlines, links, and anchors

Math statitics methods for sum, mean, median, mode, variance, deviation, etc.

Metric names for numbers, such as kilo, mega, giga

Migration helper extensions for Ruby On Rails development

A Minitest assertion & expectation to compare the assigns(:symbol) method, which is typical of Rails controllers

A Minitest assertion & expectation to compare two objects by sending a message

A Minitest assertion & expectation to compare two collections, such as enumerations or arrays, in any order, and with output that shows the difference

A few simple Minitest assertions and expectations

Numeric#percent method to calculate a percentage

Numeric #round, #floor, #ceil, #truncate methods

PersonName methods to calculate a person's full name, list name, initials, etc.

Logs more information than the typical Ruby logger.