TreeStruct allows to describe a structure with nested TreeStruct and with arrays of TreeStruct. The level of nesting is not limited.

Syntax Tree support for ERB

ArchiveTree is a Ruby Gem that makes it easy for you to create beautiful chronological archive trees of your models. For instance, you can create a tree for your blog posts.

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Stringify trees in a fashion similar the output known from the unix tool 'tree'

Translate Syntax Tree into other representations

syntax_tree plugin to prevent converting `if` expressions to ternary.

Implement orderable trees in ActiveRecord using the nested set model, with multiple roots and scoping, and most importantly user-defined ordering of subtrees. Fetches preordered trees in one go, updates are write-heavy. This is a substantially butchered-up version/offspring of acts_as_threaded. ...

In-memory Tree-like structure to store counters with rolling frame/window.

Syntax Tree support for XML

NdcTree is a library outputs a list of NDC(Nippon Decimal Classification) as a tree-structured data.

A syntax_tree plugin to disable int formatting.

Implements treeview via jquery.treeview for models using acts_as_tree.

Syntax Tree support for Brainf***

Transforms Perseus Treebank files

A simple TreeView Rails 8+ gem based on Stimulus (no jQuery is required). A server side handling of the tree is included. The client side display of the usual legend can be adapted to the user's requirements to include links.

This module implements ordered n-ary branching tree structures. It includes support for breadth- and depth- first iteration, and serialization to and from a bracketed tree string.

Syntax Tree support for JSON

Implement orderable trees in ActiveRecord using the nested set model, with multiple roots and scoping, and most importantly user-defined ordering of subtrees. Fetches preordered trees in one go, updates are write-heavy. This is a substantially butchered-up version/offspring of acts_as_threaded. ...

Syntax Tree support for CSS