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Commitb201487

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Fixes updateChild with updateSize when the newChild is Nil and the parent is not Nil.
1 parent19a12da commitb201487

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2 files changed

+25
-2
lines changed

2 files changed

+25
-2
lines changed

‎src/data-structures/size-balanced-tree.js

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -83,6 +83,7 @@
8383
parent.left=newChild;
8484
}
8585
if(newChild===Nil){
86+
parent.updateSize();
8687
returnparent;
8788
}
8889
newChild.parent=parent;
@@ -277,7 +278,7 @@
277278
updateChild(node,node.left)
278279
LRM.right=node.right
279280
LRM.right.parent=LRM;
280-
maintainNode=node.right;
281+
maintainNode=LRM.right;
281282
}
282283
this._root=maintainSizeBalancedTree(maintainNode);
283284
returnremovedNode;

‎test/data-structures/size-balanced-tree.spec.js

Lines changed: 23 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -71,20 +71,25 @@ describe('SBTree', function () {
7171
varright=newNode(15,root,Nil,Nil,1);
7272
varleftLeft=newNode(10,left,Nil,Nil,1);
7373
left.left=leftLeft;
74+
left.updateSize();
7475
root.left=left;
7576
root.right=right;
77+
root.updateSize();
78+
expect(root.size).toBe(4);
79+
7680
updateChild(left,leftLeft);
7781
expect(leftLeft.parent).toBe(root);
7882
expect(root.left).toBe(leftLeft);
7983
updateChild(leftLeft,Nil);
8084
checkNil();
8185
expect(root.left).toBe(Nil);
86+
expect(root.size).toBe(2);
8287
updateChild(Nil,right);
8388
expect(right.parent).toBe(Nil);
8489
checkNil();
8590
});
8691

87-
it('push and get 100000 elements',function(){
92+
it('push and get 100000 elements, remove the array by always remove the first/last element',function(){
8893
varsTree=newSBTree();
8994
for(vari=0;i<100000;++i){
9095
sTree.push(i);
@@ -93,5 +98,22 @@ describe('SBTree', function () {
9398
for(vari=0;i<100000;++i){
9499
expect(sTree.get(i).value).toBe(i);
95100
}
101+
for(vari=0;i<100000;++i){
102+
expect(sTree.get(0).value).toBe(i);
103+
varnode=sTree.remove(0);// Always remove the first element;
104+
expect(node.value).toBe(i);
105+
}
106+
checkNil();
107+
expect(sTree._root).toBe(Nil);
108+
varcount=10000;
109+
for(vari=0;i<count;++i){
110+
sTree.push(i);
111+
}
112+
for(vari=0;i<count;++i){
113+
varnode=sTree.remove(count-i-1);// Always remove the last element;
114+
expect(node.value).toBe(count-i-1);
115+
expect(sTree.size).toBe(count-i-1);
116+
}
117+
checkNil();
96118
});
97119
});

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