Adds extensions and constants for days of the week

Date.stamp method for RFC ISO date stamp

Adds extensions for DateTime#rand, Date#rand, Time#rand

Adds extensions for DateTime#random, Date#random, Time#random

Email address validation using RFC 822 pattern matching regular expressions

Define the `==` method to compare two objects' classes, instance variables, and their values

Generate sample names, places, agents, tweets, etc.

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