To make it easier to build and manipulate SQL queries, sql_tree can parse an SQL query to represent it as a tree of nodes and can generate an SQL query given a tree as input

GUI for sortable tree to manage data organized in tree with ancestry gem.

A binary tree of one-time singatures known as a merkle tree. Often used in distributed systems such as Git, Cassandra or Bitcoin for efficiently summarizing sets of data.

Tree_hierarchy allows to form a tree structure based on parent-child relationship with simple and fast computation for large records. Additional feature of updating the parent record with the sum of its child value

git-status-tree is a command line tool that shows git repository changes in a file tree.

A self balancing avl binary search tree class. Also includes BinarySearchTreeHash which is a hash like class that internally uses binary search tree.

fast_tree is an implementation of tree structure using nested sets model

Task Tree is a CLI tool that helps you keep track of your tasks in a tree structure

This library can be used to build a tree structure, and render or print it like an ASCII graph. It can be used to implement a directory tree viewer or something like that.

Trie-like, prefix-tree data structures. First, a prefix-tree based on Arrays, which differs from a traditional trie, which maps strings to values. Second, a more general prefix-tree data structure that works for any type of keys, provided those keys can be transformed to and from an array. Both ...

Library for building websites from a tree of Textile files. Cut your Textile into a nice website! Makas generates websites from a tree of Textile files. It does not try to deduce any meaning from the structure of that tree (i.e. where files are in the directory hierarchy), but can generate a b...

A plugin for DataMapper that allows model objects to be a part of a heirarchal tree structure. Based on the acts_as_tree plugin for ActiveRecord.

Provides a generic tree data structure with ability to store keyed node elements in the tree. The implementation mixes in the Enumerable module.

Ancestry allows the records of a ActiveRecord model to be organised in a tree structure, using a single, intuitively formatted database column. It exposes all the standard tree structure relations (ancestors, parent, root, children, siblings, descendants) and all of them can be fetched in a singl...

Multiroot_tree has some of the functions of a typical tree data structure. It can be used to model process, dependencies, and prerequisites.

An Acts As Tree like implementation for MongoMapper based on mongo_mapper_acts_as_tree

This gem implements a rooted, ordered tree, with a focus on easy iteration over nodes and access to basic tree properties. Moved to ---> "rooted".

Make any Rails model treeable. Any model is Treeable if it has parent chuld relation with itself

A simple binary tree gem with level order, postorder tree traversal

Line-tree parses indented lines of text and returns an array representing a tree structure.