@@ -18,13 +18,19 @@ BST.prototype.insert = function (value) {
1818
1919 while ( x !== null ) {
2020 current = x
21- if ( node . key < x . key ) x = x . left
22- else x = x . right
21+ if ( node . key < x . key )
22+ x = x . left
23+ else
24+ x = x . right
2325 }
2426
25- if ( current === null ) this . root = node
26- else if ( node . key < current . key ) current . left = node
27- else current . right = node
27+ if ( current === null )
28+ this . root = node
29+ else if ( node . key < current . key )
30+ current . left = node
31+ else
32+ current . right = node
33+ 2834 node . parent = current
2935}
3036
@@ -64,39 +70,49 @@ BST.prototype.transplant = function (u, v) {
6470BST . prototype . search = function ( value ) {
6571 let current = this . root
6672 while ( current ) {
67- if ( value === current . key ) return current
68- else if ( value < current . key ) current = current . left
69- else current = current . right
73+ if ( value === current . key )
74+ return current
75+ else if ( value < current . key )
76+ current = current . left
77+ else
78+ current = current . right
7079 }
7180 return null
7281}
7382
7483BST . prototype . min = function ( node ) {
75- while ( node . left ) node = node . left
84+ while ( node . left )
85+ node = node . left
86+ 7687 return node
7788}
7889
7990BST . prototype . max = function ( node ) {
80- while ( node . right ) node = node . right
91+ while ( node . right )
92+ node = node . right
93+ 8194 return node
8295}
8396
8497BST . prototype . sucessor = function ( value ) {
8598 let current = this . search ( value )
86- if ( current . right ) {
99+ if ( current . right )
87100 return this . min ( current . right )
88- }
101+ 89102 while ( current . parent && current === current . parent . right )
90103 current = current . parent
104+ 91105 return current . parent
92106}
93107
94108BST . prototype . predecessor = function ( value ) {
95109 let current = this . search ( value )
96110 if ( current . left )
97111 return this . max ( current . left )
112+ 98113 while ( current . parent && current === current . parent . left )
99114 current = current . parent
115+ 100116 return current . parent
101117}
102118
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