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# @markup rdoc

API Changes in RubyTree ↑

This file documents various API level changes that have been made to the RubyTree package.

Note: API level changes are expected to reduce dramatically after the 1.x release. In most cases, an alternative will be provided to ensure relatively smooth transition to the new APIs.

Release 0.8.3 Changes ↑

  • {Tree::TreeNode#siblings} will now return an empty array for the root node.

Release 0.8.0 Changes ↑

  • Added the ability to specify an optional insertion position in the {Tree::TreeNode#add} method. Idea and original code contributed by Dirk.

  • Added a new method {Tree::TreeNode#detached_subtree_copy} to allow cloning the entire tree. This method is also aliased to {Tree::TreeNode#dup}. Idea and original code contributed by Vincenzo Farruggia.

  • Converted all CamelCase method names to the canonical ruby_method_names (underscore separated). The CamelCase methods can still be invoked, but will throw a Deprecated warning.

Release 0.7.0 Changes ↑

  • Converted all exceptions thrown on invalid method arguments to from ‘RuntimeError’ to ‘ArgumentError’. This impacts the following methods:

    • {Tree::TreeNode#initialize}

    • {Tree::TreeNode#add}

    • {Tree::TreeNode#[]}

    • {Tree::BinaryTreeNode#add}

  • Added {Tree::TreeNode#level} as an alias for {Tree::TreeNode#node_depth}

  • Added new methods {Tree::TreeNode#in_degree} and {Tree::TreeNode#out_degree} to report the node’s degree stats

  • {Tree::TreeNode#is_only_child?} now returns true for a root node.

  • {Tree::TreeNode#next_sibling} and {Tree::TreeNode#previous_sibling} now return nil for a root node.

  • {Tree::TreeNode#add} and {Tree::TreeNode#<<} now throw an ArgumentError exception if a nil node is passed as an argument.

  • Added new methods {Tree::TreeNode#to_json} and Tree::TreeNode::json_create to convert to/from the JSON format. Thanks to Dirk for this change.

Release 0.6.1 Changes ↑

  • Deprecated the {Tree::TreeNode#depth} method as it was returning an incorrect depth value. Have introduced a new replacement method {Tree::TreeNode#node_depth} which returns the correct result.

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