Red-Black Tree#16

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Commits on Dec 13, 2024

create helper classes
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create Color enum
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add properties to new classes
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make Node properties nullable
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add constructors
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move properties into constructor
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formatting
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add getter
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implement setter for Color
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create insert method for most basic case
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rename enums folder to Enum
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implement setter for right and left oif RedBlackNode
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add basic binary tree insertion to insert method of RedBlackTree
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Commits on Dec 14, 2024

refactor insert
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add step in insertion to have pointer on the new node
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add uncle helper and getter for parent to RedBlackNode
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add getter for parent and uncle helper to RedBlackNode
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add first case to insert
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Commits on Dec 15, 2024

add setter for parent
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add rotateRight logic
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formatting
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fix default update of parent in rotateRight
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change surrounding if to guard pattern
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extract parent handling and add update of parent of left node
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cleanup null check
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add rotateLeft logic
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fix typo
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break insert after root creation
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add isLeftChild and isRightChild helper
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add sibling helper
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implement cases for black uncle
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add basic test setup
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fix sibling helper
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wip fix rotateLeft
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Commits on Dec 16, 2024

add first tests
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fix test for rotateLeft
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fix check for red uncle
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add fixRoot helper to RedBlackTree
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apply fixRoot after rotations
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apply breakpoints to tree balancing loop
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add basic insert test
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fix parent relation in rotations on root node
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fix iteration of fixRoot
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add return type to fixRoot
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add tests for tree with three nodes
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add test helper
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add test for negative numbers and large dataset
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fix null pointer exception problem
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fix condition for RL case
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reorganize condition to match parent, child structure
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refactor fix of root into rotate methods
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update tests to new syntax
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add return type to setRoot
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extract binaryTree insert into method to reduce cognitive complexity
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refactor to comply with typing
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add update of parent to setter for left and right
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remove usage of setParent from binaryTreeInsert
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remove setParent from rotate methods
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replace conditions with isLeftChild
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abstract similar logic of rotate methods into updateParent helper
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update do-while condition to prevent potential null pointer exception
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shut up PHPStan
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make $value readonly
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update rotate method to use setter instead of updating parent
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update setter for left and right to handle root node
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refactor updateParent
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update PHPDoc of updateParent
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use new functionality of left and right setter in rotate
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Commits on Dec 17, 2024

add direction enum
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update Direction enum by operation method
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implement isChild helper
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refactor updateParent to Direction enum and isChild usage
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refactor usage of isLeftChild and isRightChild to isChild
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remove ucfirst for usage of name
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extend Direction enum by opposite
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introduce generic rotate method
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refactor rotateRight and rotateLeft to new rotate helper
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refactor uncle to use sibling helper
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add and update PHPDocs
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change visibility of binaryTreeInsert to private
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deletion base setup
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add binaryTreeDeletion
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add two child case to binaryTreeDelete
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remove unneeded returns
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move root check up and introduce parentChildDirection
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refactor all isChild checks to usage of $parentChildDirection
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Commits on Dec 18, 2024

fix two child case relation updates
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add basic deletion testcases
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fix parentChildDirection definition
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add first tests for one and two child cases
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