The anagram test is commonly used to demonstrate how an naive implementation can perform significant order of magnitudes slower than an efficient one. We’ll also briefly go over why each implementation is not as efficient as you could make it. A word…

The Boost.StringAlgorithms library provides many free-standing functions for string manipulation. 1. converting strings to uppercase #include <boost/algorithm/string.hpp> #include <string> #include <iostream> using namespace boost::algor…

[Game Engine Architecture 7] 1.SRT Transformations When a quaternion is combined with a translation vector and a scale factor (either a scalar for uniform scaling or a vector for nonuniform scaling), then we have a viable alternative to the 4 x 4 mat…

Firt thought: an variation to LCS problem - but this one has many tricky detail. I learnt the solution from this link:https://github.com/wangyongliang/Algorithm/blob/master/hackerrank/Strings/Square%20Subsequences/main.cc And here is his code with my…

http://www.laurentluce.com/posts/python-string-objects-implementation/ Python string objects implementation June 19, 2011 This article describes how string objects are managed by Python internally and how string search is done. PyStringObject structu…

Connections Database connections are an expensive and limited resource. Your approach to connection management can significantly affect the overall performance and scalability of your application. Issues to consider include acquiring and releasing co…

熟悉系统目录结构 掌握27个常用命令 掌握针对目录.文件的操作 掌握查找与文件内容的操作 一.命令 命令:内部命令(不依赖其他文件,可以直接执行)与外部命令 .他是用于实现某一类功能的指令或程序,其执行依赖于解释器程序.(有些通过shell来执行,有些独立于shell) 命令字[选项][参数] 选项中多个短格式可以写在一起. Tab 自动补齐 针对bash shell.Ctrl + C 取消此次命令编辑.Ctrl +L 清屏. Man 名字 name 语法简介 SYNOPSIS 详细介绍 DES…

Cross-domain security for data vault is described. At least one database is accessible from a plurality of network domains, each network domain having a domain security level. The at least one database includes at least one partitioned data table tha…

Leetcode--回溯法常考算法整理 Preface Leetcode--回溯法常考算法整理 Definition Why & When to Use Backtrakcing How to Use Backtracking Leetcode Problems N-Queens Permutations II Combinations Sudoku Solver Definition First, let's see the definition of backtracking given b…

Given two strings s and t , write a function to determine if t is an anagram of s. Example 1: Input: s = "anagram", t = "nagaram" Output: true Example 2: Input: s = "rat", t = "car" Output: false Note:You may assume…