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null fixes

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This commit is contained in:
Dennis Eichhorn 2023-10-15 19:32:04 +00:00
parent bd29e83c06
commit 2b6e7b008d
1 changed files with 7 additions and 8 deletions
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15
Stdlib/Tree/BinarySearchTree.php
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@ -249,15 +249,15 @@ class BinarySearchTree
if ($node->parent->left !== null if ($node->parent->left !== null
&& $node->parent->left->root?->compare($node->data) === 0 && $node->parent->left->root?->compare($node->data) === 0
) { ) {
$node->parent->left = $temp->tree; $node->parent->left = $temp?->tree;
} elseif ($node->parent->right !== null } elseif ($node->parent->right !== null
&& $node->parent->right->root?->compare($node->data) === 0 && $node->parent->right->root?->compare($node->data) === 0
) { ) {
$node->parent->right = $temp->tree; $node->parent->right = $temp?->tree;
} }
} }
$temp->parent = $node->parent; $temp->parent = $node?->parent;
$node = null; $node = null;
@ -270,21 +270,20 @@ class BinarySearchTree
if ($node->parent->left !== null if ($node->parent->left !== null
&& $node->parent->left->root?->compare($node->data) === 0 && $node->parent->left->root?->compare($node->data) === 0
) { ) {
$node->parent->left = $temp->tree; $node->parent->left = $temp?->tree;
} elseif ($node->parent->right !== null } elseif ($node->parent->right !== null
&& $node->parent->right->root?->compare($node->data) === 0 && $node->parent->right->root?->compare($node->data) === 0
) { ) {
$node->parent->right = $temp->tree; $node->parent->right = $temp?->tree;
} }
} }
$temp->parent = $node->parent; $temp->parent = $node?->parent;
$node = null; $node = null;
return; return;
} else { } elseif (($temp = $this->successor($node)) !== null) {
$temp = $this->successor($node);
$node->key = $temp->key; $node->key = $temp->key;
$node->data = $temp->data; $node->data = $temp->data;