https://github.com/nashby/cityhash

Ruby wrapper for google's cityhash.
https://github.com/nashby/cityhash

Last synced: 14 days ago
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Ruby wrapper for google's cityhash.

• Host: GitHub
• URL: https://github.com/nashby/cityhash
• Owner: nashby
• License: mit
• Created: 2011-04-22T07:00:53.000Z (over 13 years ago)
• Default Branch: master
• Last Pushed: 2017-10-11T17:33:10.000Z (about 7 years ago)
• Last Synced: 2024-10-23T08:55:07.544Z (22 days ago)
• Language: C++
• Homepage: https://github.com/nashby/cityhash
• Size: 162 KB
• Stars: 95
• Watchers: 4
• Forks: 51
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE.txt

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README

        
### cityhash [![TravisCI](https://secure.travis-ci.org/nashby/cityhash.png?branch=master)](http://travis-ci.org/nashby/cityhash)

Ruby wrapper for google's cityhash.

### Install

    gem install cityhash

### Usage

```ruby

require 'cityhash'

text = "test"

seed1 = 12345

seed2 = 54321

CityHash.hash32(text)               # => 1633095781

CityHash.hash64(text)               # => 8581389452482819506

CityHash.hash64(text, seed1)        # => 9154302171269876511

CityHash.hash64(text, seed1, seed2) # => 4854399283587686019

CityHash.hash128(text)              # => 124124989950401219618153994964897029896

CityHash.hash128(text, seed1)       # => 101668641288246442316643001405184598611

CityHash.hash128crc(text)           # => 124124989950401219618153994964897029896

CityHash.hash128crc(text, seed1)    # => 101668641288246442316643001405184598611

CityHash.hash256crc(text)           # => 11964743055457135893972873789222488394617411264226841264756

```

### Important note

CityHash does not maintain backward compatibility with previous versions. You should not use CityHash for persitent storage, or else never upgrade it. 

If you need backward compatibility please consider other hash functions like [xxHash](https://github.com/nashby/xxhash) or [MurmurHash](https://github.com/ksss/digest-murmurhash)

### Contributing to cityhash

* Check out the latest master to make sure the feature hasn't been implemented or the bug hasn't been fixed yet

* Check out the issue tracker to make sure someone already hasn't requested it and/or contributed it

* Fork the project

* Start a feature/bugfix branch

* Commit and push until you are happy with your contribution

* Make sure to add tests for it. This is important so I don't break it in a future version unintentionally.

* Please try not to mess with the Rakefile, version, or history. If you want to have your own version, or is otherwise necessary, that is fine, but please isolate to its own commit so I can cherry-pick around it.

### Authors

#### [Contributors](http://github.com/nashby/cityhash/contributors)

 - [Johannes Holzfuß](http://github.com/DataWraith)

 - [Quin Hoxie](https://github.com/qhoxie)

 - [David Dai](https://github.com/newtonapple)

 - [Sergey Nartimov](https://github.com/lest)

[Vasiliy Ermolovich](http://github.com/nashby/)


### Copyright

Copyright (c) 2012 Vasiliy Ermolovich. See LICENSE.txt for

further details.