ParseTree is a C extension (using RubyInline) that extracts the parse tree for an entire class or a specific method and returns it as a s-expression (aka sexp) using ruby's arrays, strings, symbols, and integers. As an example: def conditional1(arg1) if arg1 == 0 then return 1 e...

Fully featured tree implementation for Mongoid using the nested set model

A library for parsing equations into an abstract syntax tree for evaluation

Generate the original Ruby source from a Ripper-style abstract syntax tree.

A Gem for syntactically correct parse trees of Ruby source

A modular scale is a list of values that share the same relationship. These values are often used to size type and create a sense of harmony in a design. Proportions within modular scales are all around us from the spacing of the joints on our fingers to branches on trees. These natural proportio...

A priority queue which implements a lazy binomial heap. It supports the change priority operation, being suitable for algorithms like Dijkstra's shortest path and Prim's minimum spanning tree. It can be instantiated as a min-priority queue as well as a max-priority queue.

Full power of Java's ANTLR 3 language recognition tool brought to Ruby. Generate lexers, parsers, tree parsers, source translators, and language analysis tools for use in Ruby applications.

bcdatabase is a tool for storing passwords and other configuration information outside of your application source tree.

jsTree is jquery plugin, that provides interactive trees. It is absolutely free, open source and distributed under the MIT license.

Burkhard Keller Tree implementation in Ruby

Port of the old, venerable ActsAsTree with a bit of a twist

Yadriggy builds the abstract syntax tree (AST) of a method, checks its syntax and types, and runs it. When checking the syntax and types, it is treated as the code written in a domain specific language (DSL). It also provide simple DSLs for computation offloading from Ruby to C, Python, etc.

ActiveRecord extension for sorted adjacency lists support

Port of the old, venerable ActsAsTree with a bit of a twist

Ruby & JRuby gem with a fast k-d tree C implementation using FFI bindings with support for latitude/longitude and geo distance range search

Sycamore is an unordered tree data structure.

The Lorax is a full diff and patch library for XML/HTML documents, based on Nokogiri. It can tell you whether two XML/HTML documents are identical, or if they're not, tell you what's different. In trivial cases, it can even apply the patch. It's based loosely on Gregory Cobena's master's thesis...

Port of the old, venerable ActsAsTree with a bit of a twist

A set of feature-rich extendible Netzke components (such as Grid, Tree, Form, Window) and component extensions which can be used as building blocks for your apps