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fix(wavl): fix delete and syntax error

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Signed-off-by: Matej Focko <mfocko@redhat.com>
This commit is contained in:
Matej Focko 2022-05-07 16:53:50 +02:00
parent fc1c9162d6
commit c3a9a48d99
Signed by: mfocko
GPG key ID: 7C47D46246790496
1 changed files with 10 additions and 5 deletions
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15
wavl.js
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@ -97,7 +97,7 @@ class WAVLTree extends AVLTree {
return; return;
} }
let y = parent.left === x ? parent.right : parent.left; y = parent.left === x ? parent.right : parent.left;
xDiff = nodeDifference(x, parent); xDiff = nodeDifference(x, parent);
yDiff = nodeDifference(y, parent); yDiff = nodeDifference(y, parent);
@ -136,11 +136,16 @@ class WAVLTree extends AVLTree {
} }
deleteFixup(y, parent) { deleteFixup(y, parent) {
let z = y ? y : parent; if (nodeDifferences(y).equals([2, 2])) {
y.demote();
if (nodeDifferences(z).equals([2, 2])) {
z.demote();
this.record(); this.record();
parent = y.parent;
} else if (nodeDifferences(parent).equals([2, 2])) {
parent.demote();
this.record();
parent = parent.parent;
} }
if (!parent) { if (!parent) {