Hashing

Hashie is a collection of classes and mixins that make hashes more powerful.

bcrypt() is a sophisticated and secure hash algorithm designed by The OpenBSD project for hashing passwords. The bcrypt Ruby gem provides a simple wrapper for safely handling passwords.

bcrypt() is a sophisticated and secure hash algorithm designed by The OpenBSD project for hashing passwords. The bcrypt Ruby gem provides a simple wrapper for safely handling passwords.

A RBTree is a sorted associative collection that is implemented with a Red-Black Tree. It maps keys to values like a Hash, but maintains its elements in ascending key order. The interface is the almost identical to that of Hash.

Have you ever wanted to call <code>exit()</code> with an error condition, but weren't sure what exit status to use? No? Maybe it's just me, then. Anyway, I was reading manpages late one evening before retiring to bed in my palatial estate in rural Oregon, and I stumbled across <code>sysexits(3)</code>. Much to my chagrin, I couldn't find a +sysexits+ for Ruby! Well, for the other 2 people that actually care about <code>style(9)</code> as it applies to Ruby code, now there is one! Sysexits is a *completely* *awesome* collection of human-readable constants for the standard (BSDish) exit codes, used as arguments to +exit+ to indicate a specific error condition to the parent process. It's so fantastically fabulous that you'll want to fork it right away to avoid being thought of as that guy that's still using Webrick for his blog. I mean, <code>exit(1)</code> is so passé! This is like the 14-point font of Systems Programming. Like the C header file from which this was derived (I mean forked, naturally), error numbers begin at <code>Sysexits::EX__BASE</code> (which is way more cool than plain old +64+) to reduce the possibility of clashing with other exit statuses that other programs may already return. The codes are available in two forms: as constants which can be imported into your own namespace via <code>include Sysexits</code>, or as <code>Sysexits::STATUS_CODES</code>, a Hash keyed by Symbols derived from the constant names. Allow me to demonstrate. First, the old way: exit( 69 ) Whaaa...? Is that a euphemism? What's going on? See how unattractive and... well, 1970 that is? We're not changing vaccuum tubes here, people, we're <em>building a totally-awesome future in the Cloud™!</em> include Sysexits exit EX_UNAVAILABLE Okay, at least this is readable to people who have used <code>fork()</code> more than twice, but you could do so much better! include Sysexits exit :unavailable Holy Toledo! It's like we're writing Ruby, but our own made-up dialect in which variable++ is possible! Well, okay, it's not quite that cool. But it does look more Rubyish. And no monkeys were patched in the filming of this episode! All the simpletons still exiting with icky _numbers_ can still continue blithely along, none the wiser.

Ancestry allows the records of a ActiveRecord model to be organized in a tree structure, using the materialized path pattern. It exposes the standard relations (ancestors, parent, root, children, siblings, descendants) and allows them to be fetched in a single query. Additional features include named scopes, integrity checking, integrity restoration, arrangement of (sub)tree into hashes and different strategies for dealing with orphaned records.

Hashdiff is a diff lib to compute the smallest difference between two hashes.

Includes the ability to specify data using hashes, yml files or JSON files

XML to Hash translator

Ruby Gem for convenient reading and writing of CSV files. It has intelligent defaults, and auto-discovery of column and row separators. It imports CSV Files as Array(s) of Hashes, suitable for direct processing with ActiveRecord, kicking-off batch jobs with Sidekiq, parallel processing, or oploading data to S3. Similarly, writing CSV files takes Hashes, or Arrays of Hashes to create a CSV file.

The best solution for store global settings in Rails applications. This gem will managing a table of а global key, value pairs easy. Think of it like a global Hash stored in your database, that uses simple ActiveRecord like methods for manipulation. Keep track of any global setting that you dont want to hard code into your rails app. You can store any kind of object. Strings, numbers, arrays, or any object.

Gyoku translates Ruby Hashes to XML

RecursiveOpenStruct is a subclass of OpenStruct. It differs from OpenStruct in that it allows nested hashes to be treated in a recursive fashion. For example: ros = RecursiveOpenStruct.new({ :a => { :b => 'c' } }) ros.a.b # 'c' Also, nested hashes can still be accessed as hashes: ros.a_as_a_hash # { :b => 'c' }

Recursively merge hashes.

Secret management by encrypting values in a JSON hash with a public/private keypair

resque-status is an extension to the resque queue system that provides simple trackable jobs. It provides a Resque::Plugins::Status::Hash class which can set/get the statuses of jobs and a Resque::Plugins::Status class that when included provides easily trackable/killable jobs.

This gem adds support for the postgres hstore type. It is the _just right_ alternative for storing hashes instead of using seralization or dynamic tables.

Blueprinter is a JSON Object Presenter for Ruby that takes business objects and breaks them down into simple hashes and serializes them to JSON. It can be used in Rails in place of other serializers (like JBuilder or ActiveModelSerializers). It is designed to be simple, direct, and performant.

fnv1 and fnv1a hash functions in pure ruby

the awesome ruby container you've always wanted: a string/symbol indifferent ordered hash that works in all rubies

A Sinatra extension for setting and showing Rails-like flash messages. This extension improves on the Rack::Flash gem by being simpler to use, providing a full range of hash operations (including iterating through various flash keys, testing the size of the hash, etc.), and offering a 'styled_flash' view helper to render the entire flash hash with sensible CSS classes. The downside is reduced flexibility -- these methods will *only* work in Sinatra.

Class to build custom data structures, similar to a Hash.

implementation of murmur3 hashing function

The SHA-3 (Keccak) hash.

Graph is a type of hash that outputs in graphviz's dot format. It comes with a command-line interface that is easily pluggable. It ships with plugins to graph dependencies and status of installed rubygems, rake tasks, homebrew ports, mac ports, and freebsd ports, coloring leaf nodes blue, outdated nodes red, and outdated leaf nodes purple (red+blue). OSX quick tip: % sudo gem install graph --development % sudo brew install graphviz % gem unpack graph % cd graph* % rake gallery % open gallery/*.png

A Ruby frontend to the pdftk binary, including FDF and XFDF creation. Also works with the PDFTK Java port. Just pass your template and a hash of data to fill in.

Removes the tedium of formulaic form filling with Capybara by allowing you to specify a hash of attributes to be input rather than procedurally calling Capybara’s DSL methods.

It returns a hash file with the difference in terms of year, month, week, day, hour, minute and second

Simple Hash extension to make working with nested hashes (e.g. for configuration) easier and less error-prone.

This gem allows you to easily use [Hashids](http://hashids.org/ruby/) in your Rails app. Instead of your models using sequential numbers like 1, 2, 3, they will instead have unique short hashes like "yLA6m0oM", "5bAyD0LO", and "wz3MZ49l". The database will still use integers under the hood, so this gem can be added or removed at any time.

MetaWhere offers the ability to call any Arel predicate methods (with a few convenient aliases) on your Model's attributes instead of the ones normally offered by ActiveRecord's hash parameters. It also adds convenient syntax for order clauses, smarter mapping of nested hash conditions, and a debug_sql method to see the real SQL your code is generating without running it against the database. If you like the new AR 3.0 query interface, you'll love it with MetaWhere.

A nested hash data structure for controlling build environments.

A simple LRU-cache based on a hash and priority queue

Flash hash implementation for Rack apps.

Allows access to the query component of the URI as a Hash.

Tokyo Cabinet is a library of routines for managing a database. The database is a simple data file containing records, each is a pair of a key and a value. Every key and value is serial bytes with variable length. Both binary data and character string can be used as a key and a value. There is neither concept of data tables nor data types. Records are organized in hash table, B+ tree, or fixed-length array.

a Consistent Hashing implementation in pure Ruby using an AVL Tree

Initialize object attributes via attributes hash

Have you ever needed to automatically convert Ruby-style snake_case to CamelCase or camelBack hash keys? Awrence to the rescue. This gem recursively converts all snake_case keys in a hash structure to camelBack.

Open local or remote XLSX, XLS, ODS, CSV (comma separated), TSV (tab separated), other delimited, fixed-width files, and Google Docs. Returns an enumerator of Arrays or Hashes, depending on whether there are headers.

The Hashery is a tight collection of Hash-like classes. Included among its many offerings are the auto-sorting Dictionary class, the efficient LRUHash, the flexible OpenHash and the convenient KeyHash. Nearly every class is a subclass of the CRUDHash which defines a CRUD model on top of Ruby's standard Hash making it a snap to subclass and augment to fit any specific use case.

Easy Diff enhances the functionality of Hash, allowing recursive diff, merge, and unmerge of arbitrarily constructed hashes. This is perfect for people who need to do diffs on not only plain text files but also data as Hash or JSON objects. Unmerge is included with diff and merge to more easily allow versioning of arbitrary data.

The stellar-base library is the lowest-level stellar helper library. It consists of classes to read, write, hash, and sign the xdr structures that are used in stellar-core.

Glimmer is a Ruby DSL Framework for Ruby GUI and More, consisting of a DSL Engine and a Data-Binding Library (including Observer Design Pattern, Observable Model, Observable Array, and Observable Hash). Used in Glimmer DSL for SWT (JRuby Desktop Development GUI Framework), Glimmer DSL for Web (Ruby in the Browser Web Frontend Framework), Glimmer DSL for LibUI (Prerequisite-Free Ruby Desktop Development GUI Library and Winner of Fukuoka Ruby Award Competition 2022 Special Award), Glimmer DSL for Tk (Ruby Tk Desktop Development GUI Library), Glimmer DSL for GTK (Ruby-GNOME Desktop Development GUI Library), Glimmer DSL for FX (FOX Toolkit Ruby Desktop Development GUI Library), Glimmer DSL for WX (wxWidgets Ruby Desktop Development GUI Library), Glimmer DSL for Swing (JRuby Swing Desktop Development GUI Library), Glimmer DSL for JFX (JRuby JavaFX Desktop Development GUI Library), Glimmer DSL for XML (& HTML), and Glimmer DSL for CSS.

Saxerator is a streaming xml-to-hash parser designed for working with very large xml files by giving you Enumerable access to manageable chunks of the document.

Ruby library to validate hashes (Hash) against user-defined requirements

Translates XML to and from Ruby Hash objects, following the BadgerFish convention.

iniparser - read / parse INI configuration, settings and data files into a hash (incl. named subsections)

Platform agnostic MD5 hash from simple data structures made of numbers, strings, booleans, nil, arrays or hashes.

Making object from any hash or hash array