Only 70 lines. Add a optional type system to ruby using runtime checks and contracts . make it crash early, know exactly what a function (or method) returns and specify the 'type' of the parameters using good old ducktyping

a Rails gem that allows you to validate a URL entered in a form. It validates if the URL exists by hitting it with a HEAD request. The improved version includes retries for common patterns when the head request is refused before giving a failure notice. It also looks up a SITE_URL constant to...

Decorator style assertions and type check library for Contract programming.

This gem adds Mobility plugin, which can be turned on for Rails model, and will check types of values passed to setters.

A database structure reader for PostgreSQL with support for tables, fields, primary keys, indexes, foreign keys, check constraints, enum types and extensions.

A new check for puppet-lint that validates that all parameters are typed.

This gem is for printing hyperlinks in supported terminal emulators. It is a simple wrapper that abstracts the ANSI characters usually required to achieve this, which are annoying to type out. Check out the gist that inspired this gem at: https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f...

Typedeaf is a gem to help add some type-checking to method declarations in Ruby

tspec can check type of methods arguments and return value.

Taipo provides a simple way to check your variables are what you think they are. With an easy to use syntax you can call a single method and pass expressive type definitions.

The Preconditions library provides a simple set of methods for checking arguments being passed into a method. Instead of writing custom checks and raising exceptions directly in your code you can use Preconditions to verify basic properties of your arguments (not-nil, satisfying a boolean expres...

Rzd is a gem automating checking ticket information for russian railway service rzd.ru. Now it allows to get available ticket types fro given cities and date.

# License Create software licenses easily. ## Install ### Bundler: `gem 'license'` ### RubyGems: `gem install license` ## Usage ### Simple ```ruby license = License::Software::MIT.new do |l| l.year.start = 2012 l.author.name = 'Ryan Scott Lewis' l.author.email = 'ryan@rynet.us' end...

Pronto runner for Sorbet, a static type checker for Ruby

# COM # COM is an object-oriented wrapper around WIN32OLE. COM makes it easy to add behavior to WIN32OLE objects, making them easier to work with from Ruby. ## Usage ## Using COM is rather straightforward. There’s basically four concepts to keep track of: 1. COM objects 2. Instantiable...

Type-checked set and array

Return a variable if it's present (and optionally of the right type), otherwise a default or nil. Adds a top level demand() method, which replaces long lines of repetitive code to check for nil?/present?/empty?, etc., hard-to-read ternary operators (?:) and if statements. A block can also be spec...

This gem allows you to check the Content-Type of any HTTP-accessible asset.

# mdtoc - Markdown Table of Contents Read Markdown files and output a table of contents. ## Installation Requirements: * [Ruby](https://www.ruby-lang.org/en/) (see [.ruby-version](./.ruby-version)) ``` $ gem install mdtoc ``` ## Usage ``` $ mdtoc --help Usage: mdtoc [options] files or dire...

Enables Type Checking per client