Created
May 23, 2024 16:38
-
-
Save zlrlo/14aa251b5f472e01452c8bf4fd0d07d7 to your computer and use it in GitHub Desktop.
[JS] Min Heap 구현
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| class MinHeap { | |
| constructor() { | |
| this.heap = [null]; | |
| } | |
| push(value) { | |
| this.heap.push(value); | |
| let currentIndex = this.heap.length - 1; | |
| let parentIndex = Math.floor(currentIndex / 2); | |
| while (parentIndex !== 0 && this.heap[parentIndex] > value) { | |
| const temp = this.heap[parentIndex]; | |
| this.heap[parentIndex] = value; | |
| this.heap[currentIndex] = temp; | |
| currentIndex = parentIndex; | |
| parentIndex = Math.floor(currentIndex / 2); | |
| } | |
| } | |
| pop() { | |
| const returnValue = this.heap[1]; | |
| this.heap[1] = this.heap.pop(); | |
| let currentIndex = 1; | |
| let leftIndex = 2; | |
| let rightIndex = 3; | |
| while (this.heap[currentIndex] > this.heap[leftIndex] || | |
| this.heap[currentIndex] > this.heap[rightIndex]) { | |
| if (this.heap[leftIndex] > this.heap[rightIndex]) { | |
| const temp = this.heap[currentIndex]; | |
| this.heap[currentIndex] = value; | |
| this.heap[rightIndex] = temp; | |
| currentIndex = rightIndex; | |
| } else { | |
| const temp = this.heap[currentIndex]; | |
| this.heap[currentIndex] = value; | |
| this.heap[leftIndex] = temp; | |
| currentIndex = leftIndex; | |
| } | |
| leftIndex = currentIndex * 2; | |
| rightIndex = currentIndex * 2 + 1; | |
| } | |
| return returnValue; | |
| } | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment