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json-lisp

  • 0.1.0
  • Rubygems
  • Socket score

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JSON::Lisp

Execute lisp-like s-expressions written in JSON.

The aim of JSON-Lisp is to allow for an executable code format that is simple and portable, as well as easy to parse and execute in a controlled, sandboxed environment. This allows it to be stored in a database, sent over an HTTP connection, collected from user input, and executed on either a client or a server's machine.

Installation

Add this line to your application's Gemfile:

gem 'json-lisp'

And then execute:

$ bundle

Or install it yourself as:

$ gem install json-lisp

Usage

constants = {
  "a" => 5,
  "b" => 7,
  "+" => -> (a, b) { a + b },
  "-" => -> (a, b) { a - b }
}

json_lisp_env = JSON::Lisp::Env.new(constants)

json_lisp_env.evaluate(["+", "a", "b"])           #=> 12
json_lisp_env.evaluate(["-", "a", 3])             #=> 2
json_lisp_env.evaluate(["+", 2, "b"])             #=> 9
json_lisp_env.evaluate(["+", "a", ["-", "b", 2]]) #=> 10

json_lisp_env.evaluate_json('["+", "a", ["-", "b", 2]]') #=> 10

See Also

  1. JSON Lisp for JavaScript

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/jellymann/json-lisp-ruby.

License

The gem is available as open source under the terms of the MIT License.

FAQs

Package last updated on 17 Feb 2018

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