实现 快速排序算法

src/assets/js/algorithm/sort.js

@@ -387,7 +387,7 @@ class MergeSort extends Sort {
  * 随机快速排序算法 Random Quick Sort  v0.1.0
  *
  * @author  coder-xiaomo
- * @date    2022-05-19
+ * @date    2022-08-08
  */
 class RandomQuickSort extends Sort {
 
@@ -395,31 +395,67 @@ class RandomQuickSort extends Sort {
         return {
             name: "随机快速排序算法",
             enName: "Random Quick Sort",
+            available: true
         }
     }
 
     /*
         每个（未排序）的部分
-        随机选取 pivot，和第一个元素交换
+        将第一个元素设为 pivot
             存储索引 = pivot索引 +1
             从 i=pivot指数 +1 到 最右索引 的遍历
                 如果 a[i] < a[pivot]
                     交换 (i, 存储索引); 存储索引++;
             交换(pivot, 存储索引 - 1)
     */
-    sort(array) {
+    sort(array, left, right) {
         if (array.length == 0)
             return array
-        // todo
-        console.log("尚未实现")
+
+        if (typeof left === 'undefined') left = 0
+        if (typeof right === 'undefined') right = array.length - 1
+        if (left < right) {
+            let pivot = left
+            let storeIndex = pivot + 1
+            for (let i = pivot + 1; i <= right; i++) {
+                if (array[i] < array[pivot]) {
+                    this.swap(array, i, storeIndex)
+                    storeIndex++
+                }
+            }
+            this.swap(array, pivot, storeIndex - 1)
+
+            this.sort(array, left, storeIndex - 2)
+            this.sort(array, storeIndex, right)
+        }
         return array
     }
 
-    sortWithAnimation(customAttr, array) {
+    sortWithAnimation(customAttr, array, left, right) {
         if (array.length == 0)
             return array
-        // todo
-        console.log("尚未实现")
+
+        if (typeof left === 'undefined') left = 0
+        if (typeof right === 'undefined') right = array.length - 1
+        if (left < right) {
+            let pivot = left
+            let storeIndex = pivot + 1
+            animation.emphasisLinkedListItems(customAttr.id, [left, right], {})
+            animation.emphasisLinkedListItems(customAttr.id, [left, right], { popBack: true })
+            for (let i = pivot + 1; i <= right; i++) {
+                animation.compareLinkedListItems(customAttr.id, i, storeIndex)
+                if (array[i] < array[pivot]) {
+                    this.swap(array, i, storeIndex)
+                    this.swapAnimation(customAttr.id, i, storeIndex)
+                    storeIndex++
+                }
+            }
+            this.swap(array, pivot, storeIndex - 1)
+            this.swapAnimation(customAttr.id, pivot, storeIndex - 1)
+
+            this.sortWithAnimation(customAttr, array, left, storeIndex - 2)
+            this.sortWithAnimation(customAttr, array, storeIndex, right)
+        }
         return array
     }
 }

src/assets/js/algorithm/test.js

@@ -41,6 +41,7 @@ var sortAlgorithm = {
     bubblesort: new BubbleSort(animation),
     selectionSort: new SelectionSort(animation),
     insertionSort: new InsertionSort(animation),
+    randomQuickSort: new RandomQuickSort(animation),
 }
 
 // 遍历每一种算法

src/assets/js/class.js

@@ -588,6 +588,40 @@ class VectorAnimation {
         customAttr.gsapTimeline.add(timeline)
     }
 
+    // 强调/恢复 数组元素
+    emphasisLinkedListItems(id, index, { popBack = false }) {
+        let linkedList = document.getElementById(id)
+        let customAttr = linkedList.customAttr
+        var gList = linkedList.childNodes
+
+        let eles = []
+        if (typeof (index) === "object") {
+            for (let i = 0; i < index.length; i++) {
+                eles.push(gList[index[i]])
+            }
+        } else {
+            eles.push(gList[index])
+        }
+
+        let timeline = gsap.timeline({
+            onStart: function () {
+                if (typeof (onStartCallback) === "function")
+                    onStartCallback()
+            },
+            onComplete: function () {
+                console.log("animation done (popup)")
+            }
+        }).add(
+            popBack == false ? [
+                gsap.to(eles, { ...this.workSpace.settings.animation.getConf(), y: customAttr.oneUnit * 0.4, fill: settings.colorMap["fill_focus"] }),
+            ] : [
+                gsap.to(eles, { ...this.workSpace.settings.animation.getConf(), y: 0, fill: settings.colorMap["fill"] }),
+            ]
+        )
+
+        customAttr.gsapTimeline.add(timeline)
+    }
+
     // 交换相邻数组元素位置（仅在水平方向呼唤，垂直方向不做调整） 【fromIndex 是y方向上突出的元素】
     exchangeLinkedListItems(id, fromIndex, toIndex) {
         if (fromIndex < toIndex)

src/index.html

@@ -79,7 +79,7 @@
     <script defer src="./assets/js/index.js"></script>
 
     <!-- 算法测试 -->
-    <!-- <script src="./assets/js/algorithm/test.js"></script> -->
+    <!-- <script defer src="./assets/js/algorithm/test.js"></script> -->
 </body>
 
 </html>