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JSONHasher

Create a stable SHA-2 hash from a JSON object.

JSON objects do not require the keys to be in any kind of order which can make creating a hash unstable. This gem solves that problem.

Installation

Add this line to your application's Gemfile:

gem 'json_hasher'

And then execute:

$ bundle

Or install it yourself as:

$ gem install json_hasher

Usage

test_json_one = '[{ "foo": "bar", "ping": "pong" }]'
test_json_two = '[{ "ping": "pong", "foo": "bar" }]'

hashed_one = JSONHasher::Parser.new(test_json_one).to_sha2
hashed_two = JSONHasher::Parser.new(test_json_two).to_sha2

# hashed_one: c15915ccb473c4cecca65f940f6a36091f70333b9e8226dfe51ca247c73e56f1
# hashed_two: c15915ccb473c4cecca65f940f6a36091f70333b9e8226dfe51ca247c73e56f1

assert_equal hashed_one, hashed_two

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/nickpoorman/ruby_json_hasher.

License

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

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Create a stable SHA-2 hash from a JSON object.

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