Move object up and down with Rails and nested set tree

Parse MTGJSON and build a tree of Ruby objects

a simple program for suggest or spellcheck keyword use trie tree

neartree is a Ruby library binding to the NearTree C library for storing point/value pairs in an R-Tree structure and searching it for the nearest neighbour for any given point.

Renders markup Wiki pages in the browser or generates static files. Hierarchical tree navigation for all pages is provided.

This provides a command-line interface to various tools that manipulate treebanks that use the PROIEL dependency format.

PRX Access is a gem to supply authentication headers and descend the HAL hypermedia link tree on PRX's APIs.

Provide basic rational numbers for trees

==== QDox - http://qdox.codehaus.org QDox is a high speed, small footprint parser for extracting class/interface/method definitions from Java source files complete with JavaDoc @tags. It is designed to be used by active code generators or documentation tools. QDox is a Java library. Therefore th...

QuickGraph provides generic directed/undirected graph datastructures and algorithms for .Net 2.0 and up. QuickGraph comes with algorithms such as depth first seach, breath first search, A* search, shortest path, k-shortest path, maximum flow, minimum spanning tree, least common ancestors, etc... ...

The RKelly library will parse JavaScript and return a parse tree, fixed to support ruby 1.9.3

Rockit is a potent parser generator and gives you AST's (Abstract Syntax Tree's) which you can pattern match and pretty-print. Rockit does not distinghuish between lexing and parsing so the generated parsers are scanner-/lexer-less. The vision is to extend Rockit with more advanced compiler-relat...

Parses simple mathematical expressions, creates a fully object-oriented expression tree. Evaluation can have injected variables.

Pure Ruby YANG parser and tree structure data store implementation

Library and program for finding all RubyGems gemspecs in a directory tree

A Treetop parser for alias files

Takes a XSD string and parses it into a tree structure of nodes. A lot similar to Nokogiri but with few more useful methods.

API documentaiton at: http://www.rubydoc.info/gems/taxonomite Manages objects classified within a taxonomy and enforces a hierarchical tree structure. Works only with MongoDB currently - may try to abstract the database layer with later versions.

Lichess API wrapper

Extract subtrees from XML trees, making sure that the overall structure is preserved.