README.md

Path: README.md
Last Update: Fri Apr 19 14:31:03 +0000 2013

# MultiJSON [![Build Status](secure.travis-ci.org/intridea/multi_json.png?branch=master)][travis] [![Dependency Status](gemnasium.com/intridea/multi_json.png?travis)][gemnasium]

[travis]: travis-ci.org/intridea/multi_json [gemnasium]: gemnasium.com/intridea/multi_json

Lots of Ruby libraries parse JSON and everyone has their favorite JSON coder. Instead of choosing a single JSON coder and forcing users of your library to be stuck with it, you can use MultiJSON instead, which will simply choose the fastest available JSON coder. Here‘s how to use it:

    require 'multi_json'

    MultiJson.load('{"abc":"def"}') #=> {"abc" => "def"}
    MultiJson.load('{"abc":"def"}', :symbolize_keys => true) #=> {:abc => "def"}
    MultiJson.dump({:abc => 'def'}) # convert Ruby back to JSON
    MultiJson.dump({:abc => 'def'}, :pretty => true) # encoded in a pretty form (if supported by the coder)

The `use` method, which sets the MultiJson adapter, takes either a symbol or a class (to allow for custom JSON parsers) that responds to both `.load` and `.dump` at the class level.

MultiJSON tries to have intelligent defaulting. That is, if you have any of the supported engines already loaded, it will utilize them before attempting to load any. When loading, libraries are ordered by speed. First Oj, then Yajl, then the JSON gem, then JSON pure. If no other JSON library is available, MultiJSON falls back to [OkJson][], a simple, vendorable JSON parser.

[okjson]: github.com/kr/okjson

## Supported JSON Engines

## Supported Ruby Versions This library aims to support and is [tested against][travis] the following Ruby implementations:

  • Ruby 1.8.7
  • Ruby 1.9.2
  • Ruby 1.9.3
  • [JRuby][]
  • [Rubinius][]
  • [MacRuby][] (not tested on Travis CI)

[jruby]: www.jruby.org/ [rubinius]: rubini.us/ [macruby]: www.macruby.org/

If something doesn‘t work on one of these interpreters, it should be considered a bug.

This library may inadvertently work (or seem to work) on other Ruby implementations, however support will only be provided for the versions listed above.

If you would like this library to support another Ruby version, you may volunteer to be a maintainer. Being a maintainer entails making sure all tests run and pass on that implementation. When something breaks on your implementation, you will be personally responsible for providing patches in a timely fashion. If critical issues for a particular implementation exist at the time of a major release, support for that Ruby version may be dropped.

## Versioning

This library aims to adhere to [Semantic Versioning 2.0.0][semver]. Violations of this scheme should be reported as bugs. Specifically, if a minor or patch version is released that breaks backward compatibility, that version should be immediately yanked and/or a new version should be immediately released that restores compatibility. Breaking changes to the public API will only be introduced with new major versions. As a result of this policy, you can (and should) specify a dependency on this gem using the [Pessimistic Version Constraint][pvc] with two digits of precision. For example:

    spec.add_dependency 'multi_json', '~> 1.0'

[semver]: semver.org/ [pvc]: docs.rubygems.org/read/chapter/16#page74

## Copyright Copyright (c) 2010 Michael Bleigh, Josh Kalderimis, Erik Michaels-Ober, and Intridea, Inc. See [LICENSE][] for details.

[license]: github.com/intridea/multi_json/blob/master/LICENSE.md

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