update README.md.

Signed-off-by: 李学强 <15681218681@163.com>

README.md

@@ -1,86 +1 @@
-Markdown 和快捷键全覆盖
-💡 Tips：语雀支持全功能 markdown 语法，可以点击文档编辑页右下角小键盘查看全部支持的语法和快捷键。
-● 支持导入导出 markdown 文件。
-● 支持自动识别粘贴的 markdown 格式内容转换为富文本。
-行内代码
-💡 Tips：可通过 markdown 语法（`+ code + ` + 空格）或者快捷键 ctrl/cmd + E快速插入行内代码。
-在文本中使用行内代码，可以顺畅地显示代码变量名。
-代码块
-💡 Tips：输入/代码块或点击上方工具栏点击上方工具栏，选择「代码块」、插入代码卡片。
-代码块同时支持多种颜色主题：
-export default class QuickSort extends Sort {
-  sort(originalArray) {
-    const array = [...originalArray];
-
-    if (array.length <= 1) {
-      return array;
-    }
-
-    // Init left and right arrays.
-    const leftArray = [];
-    const rightArray = [];
-
-    // Take the first element of array as a pivot.
-    const pivotElement = array.shift();
-    const centerArray = [pivotElement];
-
-    // Split all array elements between left, center and right arrays.
-    while (array.length) {
-      const currentElement = array.shift();
-
-      // Call visiting callback.
-      this.callbacks.visitingCallback(currentElement);
-
-      if (this.comparator.equal(currentElement, pivotElement)) {
-        centerArray.push(currentElement);
-      } else if (this.comparator.lessThan(currentElement, pivotElement)) {
-        leftArray.push(currentElement);
-      } else {
-        rightArray.push(currentElement);
-      }
-    }
-    // Sort left and right arrays.
-    const leftArraySorted = this.sort(leftArray);
-    const rightArraySorted = this.sort(rightArray);
-
-    return leftArraySorted.concat(centerArray, rightArraySorted);
-  }
-}
-export default class QuickSort extends Sort {
-  sort(originalArray) {
-    const array = [...originalArray];
-
-    if (array.length <= 1) {
-      return array;
-    }
-
-    // Init left and right arrays.
-    const leftArray = [];
-    const rightArray = [];
-
-    // Take the first element of array as a pivot.
-    const pivotElement = array.shift();
-    const centerArray = [pivotElement];
-
-    // Split all array elements between left, center and right arrays.
-    while (array.length) {
-      const currentElement = array.shift();
-
-      // Call visiting callback.
-      this.callbacks.visitingCallback(currentElement);
-
-      if (this.comparator.equal(currentElement, pivotElement)) {
-        centerArray.push(currentElement);
-      } else if (this.comparator.lessThan(currentElement, pivotElement)) {
-        leftArray.push(currentElement);
-      } else {
-        rightArray.push(currentElement);
-      }
-    }
-    // Sort left and right arrays.
-    const leftArraySorted = this.sort(leftArray);
-    const rightArraySorted = this.sort(rightArray);
-
-    return leftArraySorted.concat(centerArray, rightArraySorted);
-  }
-}
+### 设计思路-