——“功成不必在我，功成必定有我”
Author(s): Yang Li, Zhihui Wang, Wei Zhou, Rui Wang, Haiyan Zhang, Shu Zhan, Jiajia Xu。业内人士推荐夫子作为进阶阅读
const curRes = this.stack.length ? i - this.stack[this.stack.length - 1] : i + 1;，更多细节参见safew官方下载
void quickSortRecursive(int arr[], int low, int high) {
Equal (5): Everything in this space must be equal to 5. The answer is 5-5, placed vertically; 5-1, placed horizontally.