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统计个人增删行数 git config user.name git log --author="zhaoyifan" --pretty=tformat: --numstat | awk '{ add += $1; subs += $2; loc += $1 - $2 } END { printf "added lines: %s, removed lines: %s, total lines: %s\n", add, subs, loc }' - added lines: 82813, removed lines: 53707, total lines: 29106 统计每个人增删行数 git log --shortstat | grep -E "(Author: )(\s*(\w+)){2}|fil(e|es) changed" | awk ' { if($1 ~ /Author/) { author = $2" "$3 } else { files[author]+=$1 inserted[author]+=$4 deleted[author]+=$6 } } END { for (key in files) { print "Author: " key "\n\tfiles changed: ", files[key], "\n\tlines inserted: ", inserted[key], "\n\tlines deleted: ", deleted[key] } } ' 统计每个人提交次数 git shortlog -sn --no-merges 忽略某些路径的更改 git log -- . ":(exclude)sub" git log -- . ":!sub" cloc AlDanial/cloc - cloc counts blank lines, comment lines, and physical lines of source code in many programming languages. ...

注意：此操作会修改 Git 历史记录，正式工作环境不允许。 查询都有什么： git log --format='%aN %aE' | sort -u 注：一个特殊情况如果 email 没被设置过 OLD_EMAIL 可以填 user.name。 OLD_EMAIL 原来的邮箱 CORRECT_NAME 更正的名字 CORRECT_EMAIL 更正的邮箱 git filter-branch -f --env-filter ' OLD_EMAIL="old@qq.com" CORRECT_NAME="new_name" CORRECT_EMAIL="new@gmail.com" if [ "$GIT_COMMITTER_EMAIL" = "$OLD_EMAIL" ] then export GIT_COMMITTER_NAME="$CORRECT_NAME" export GIT_COMMITTER_EMAIL="$CORRECT_EMAIL" fi if [ "$GIT_AUTHOR_EMAIL" = "$OLD_EMAIL" ] then export GIT_AUTHOR_NAME="$CORRECT_NAME" export GIT_AUTHOR_EMAIL="$CORRECT_EMAIL" fi if [ "$GIT_AUTHOR_NAME" != "$CORRECT_NAME" ] then export GIT_AUTHOR_NAME="$CORRECT_NAME" export GIT_AUTHOR_EMAIL="$CORRECT_EMAIL" fi ' --tag-name-filter cat -- --branches --tags 因为修改了 Git 历史所有要使用强制推送： ...

先去官网看看 Download for Linux and Unix: RHEL and derivatives typically ship older versions of git. You can download a tarball and build from source, or use a 3rd-party repository such as the [IUS Community Project](https://ius.io/) to obtain a more recent version of git. RHEL 和衍生通常提供较老版本的 git。您可以下载 tarball 并从源代码构建，或者使用第三方存储库，如 IUS Community Project 来获得最新版本的 git。 使用 IUS RHEL/CentOS 7 yum install \ https://repo.ius.io/ius-release-el7.rpm \ https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm 安装新版 git： ius 通常会在高版本的软件名后面 + u yum list git 如果你已经装有低版本的 git，你需要先 remove（否则安装的时候会报错） yum remove git 安装 2.0 以上版本的 git ...

git add . warning: CRLF will be replaced by LF in X. CRLF：windows 环境下的换行符 LF：linux 环境下的换行符 这个错误的意思，就是文件中存在两种环境的换行符，git 会自动替换 CRLF 为 LF ，所以提示警告。 首先推荐扩展阅读：配置 Git 处理行结束符 | GitHub 我项目中是配置了 .gitattributes 的： # Set the default behavior, in case people don't have core.autocrlf set. * text=auto # Explicitly declare text files you want to always be normalized and converted # to native line endings on checkout. *.c text *.h text # Declare files that will always have CRLF line endings on checkout. *.sln text eol=crlf # Denote all files that are truly binary and should not be modified. *.png binary *.jpg binary .gitattributes 公式：要匹配的文件模式 属性1 属性2 ...。 ...

重置 data 的数据为初始状态 this.$data = { ...this.$data, ...this.$options.data() }; // Object.assign(this.$data, this.$options.data()); Object.assign({}, this.$options.data().form, { type: 1 }); 修改 ElementUI 默认样式 vue 中令人头疼的 element-ui 组件默认 css 样式修改 | juejin <template> <div class="my-class"> <el-table> </el-table> </div> </template> <style lang="scss" scoped> .my-class__expand-column .cell { display: none; } .my-class .el-table tbody tr:hover > td { cursor: pointer; } </style> watch 对象的属性 data: { a: 100, msg: { channel: "音乐", style: "活泼" } }, watch: { a(newval, oldVal) { console.log("new: %s, old: %s", newval, oldVal); } } watch: { msg: { handler(newValue, oldValue) { console.log(newValue) }, // 深度监听 deep: true } } 监听对象内的某一具体属性，可以通过 computed 做中间层来实现： computed: { channel() { return this.msg.channel } }, watch:{ channel(newValue, oldValue) { console.log('new: %s, old: %s', newValue, oldValue) } } 判断 data 中的对象是否为空 1、利用 jQuery 的 isEmptyObject： ...

编辑 settings.json command + , 右上角点击 打开设置。 { // 通过整体放大窗口比例 "window.zoomLevel": 1.1, // 字体 "editor.fontSize": 14, // 软换行 "editor.wordWrap": "on", } 显示空格和 tab 符号 Editor: Render Whitespace 控制编辑器在空白字符上显示符号的方式。 all Settings 同步 只需从左下角的设置齿轮启用内置同步。 扩展推荐 Community Material Theme EditerConfig For VS Code ESLint Git History GitLens — Git supercharged markdownlint Material Icon Theme Material Theme Prettier - Code formatter Terminal Vetur – EOF –

commit message 应该清晰明了，说明本次提交的目的。基本公式： <type>(<scope>): <subject> 完整公式： <type>(<scope>): <subject> <BLANK LINE> <body> <BLANK LINE> <footer> type 用于说明 commit 的类别，只允许使用下面 7 个标识。 feat：新功能（feature） fix：修补 bug docs：文档（documentation） style：格式（不影响代码运行的变动） refactor：重构（即不是新增功能，也不是修改 bug 的代码变动） test：增加测试 chore：构建过程或辅助工具的变动 scope 用于说明 commit 影响的范围，比如数据层、控制层、视图层等等，视项目不同而不同。 subject 是 commit 目的的简短描述，不超过 50 个字符。 以动词开头，使用第一人称现在时，比如 change，而不是 changed 或 changes 第一个字母小写 结尾不加句号 . cli 工具 commitizen cli commitizen/cz-cli 使用它提供的 git cz 命令替代我们的 git commit 命令，帮助我们生成符合规范的 commit message。 除此之外，我们还需要为 commitizen 指定一个 Adapter 比如：commitizen/cz-conventional-changelog（一个符合 Angular 团队规范的 preset）使得 commitizen 按照我们指定的规范帮助我们生成 commit message。 ...

MySQL 中的索引可以以一定顺序引用多个列，这种索引叫做联合索引，一般的，一个联合索引是一个有序元组 <a1, a2, …, an>，其中各个元素均为数据表的一列。另外，单列索引可以看成联合索引元素数为 1 的特例。 我们在 Employees Sample Database 中实验，MySQL 版本 5.7。 以 employees.titles 为例，查看其索引： SHOW INDEX FROM employees.titles; +--------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+ | Table | Non_unique | Key_name | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment | +--------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+ | titles | 0 | PRIMARY | 1 | emp_no | A | 301292 | NULL | NULL | | BTREE | | | | titles | 0 | PRIMARY | 2 | title | A | 442605 | NULL | NULL | | BTREE | | | | titles | 0 | PRIMARY | 3 | from_date | A | 442605 | NULL | NULL | | BTREE | | | +--------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+ 全列匹配 EXPLAIN SELECT * FROM employees.titles WHERE emp_no = '10009' AND title = 'Senior Engineer' AND from_date = '1995-02-18'; +----+-------------+--------+------------+-------+---------------+---------+---------+-------------------+------+----------+-------+ | id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra | +----+-------------+--------+------------+-------+---------------+---------+---------+-------------------+------+----------+-------+ | 1 | SIMPLE | titles | NULL | const | PRIMARY | PRIMARY | 159 | const,const,const | 1 | 100.00 | NULL | +----+-------------+--------+------------+-------+---------------+---------+---------+-------------------+------+----------+-------+ 当按照索引中所有列进行精确匹配（这里精确匹配指 = 或 IN 匹配）时，索引可以被用到。 ...

归并排序（英语：Merge sort，或 mergesort），是创建在归并操作上的一种有效的排序算法，效率为 O(nlogn)。1945 年由约翰·冯·诺伊曼首次提出。该算法是采用分治法（Divide and Conquer）的一个非常典型的应用，且各层分治递归可以同时进行。 采用分治法： 分割：递归地把当前序列平均分割成两半。 集成：在保持元素顺序的同时将上一步得到的子序列集成到一起（归并）。 归并操作（merge），也叫归并算法，指的是将两个已经排序的序列合并成一个序列的操作。归并排序算法依赖归并操作。 <?php function mergeSort($arr) { $len = count($arr); if ($len <= 1) { return $arr; } // 递归结束条件, 到达这步的时候, 数组就只剩下一个元素了, 也就是分离了数组 $mid = $len / 2; $left = array_slice($arr, 0, $mid); // 拆分数组0-mid这部分给左边left $right = array_slice($arr, $mid); // 拆分数组mid-末尾这部分给右边right $left = mergeSort($left); // 左边拆分完后开始递归合并往上走 $right = mergeSort($right); // 右边拆分完毕开始递归往上走 $arr = merge($left, $right); // 合并两个数组,继续递归 return $arr; } // merge函数将指定的两个有序数组(arrA, arr)合并并且排序 function merge($arrA, $arrB) { $arrC = array(); while (count($arrA) && count($arrB)) { // 这里不断的判断哪个值小, 就将小的值给到arrC, 但是到最后肯定要剩下几个值, // 不是剩下arrA里面的就是剩下arrB里面的而且这几个有序的值, 肯定比arrC里面所有的值都大所以使用 $arrC[] = $arrA[0] < $arrB[0] ? array_shift($arrA) : array_shift($arrB); } return array_merge($arrC, $arrA, $arrB); } $startTime = microtime(1); $arr = range(1, 1000); shuffle($arr); echo 'before sort: ', implode(', ', $arr), "\n"; $sortArr = mergeSort($arr); echo 'after sort: ', implode(', ', $sortArr), "\n"; echo 'use time: ', microtime(1) - $startTime, "s\n"; 假设被排序的数列中有 N 个数。遍历一趟的时间复杂度是 O(N)，需要遍历多少次呢？ ...

个人 MacBook 食用说明。推荐自动化环境配置脚本项目 imzyf/dotfiles。 软件下载 使用 brew cask 安装软件，非常方便。 安装 brew： /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)" # 查找软件 brew desc iterm2 brew search iterm2 brew info iterm2 # 安装软件 brew install --cask iterm2 软件清单 brew cask arc Chromium based browser chromium - Free and open-source web browser 🌐 dbeaver-community - Universal database tool and SQL client 🌐 docker - App to build and share containerised applications and microservices 🌐 office network can’t access https://desktop.docker.com/, have to manual install. drawio - Online diagram software 🌐 figma - Collaborative team software 💅🏼 firefox fork GIT client github - Desktop client for GitHub repositories 🌐 google-chrome - Web browser 💻 iina - Free and open-source media player 💻 imageoptim - Tool to optimise images to a smaller size 💻 iterm2 - Terminal emulator as alternative to Apple’s Terminal app 💻 itsycal - Menu bar calendar 💻 licecap - Animated screen capture application 💻 logitech-g-hub - Support for Logitech G gear 💻 mysqlworkbench notion - App to write, plan, collaborate, and get organised 💻 openinterminal orbstack Replacement for Docker Desktop phpstorm postman - Collaboration platform for API development 💻 qlstephen - Quick Look plugin for plaintext files without an extension 💻 raycast Control your tools with a few keystrokes sequel-ace slack snipaste - Snip or pin screenshots 💻 sourcetree - Graphical client for Git version control 💻 the-unarchiver - Unpacks archive files visual-studio-code warp - Rust-based terminal 💻 wetype - Text input app from WeChat team for Chinese users 💻 youdaodict - Youdao Dictionary 💻 zoom-for-it-admins brew cask archive adrive - Intelligent cloud storage platform 💻 another-redis-desktop-manager - Redis desktop manager 🌐 baidunetdisk - Cloud storage service 💻 blender - 3D creation suite 💅🏼 lens - Kubernetes IDE 🌐 mongodb-compass - Interactive tool for analyzing MongoDB data 🌐 fliqlo - Flip clock screensaver - 可以配合 触发角 使用 paper - Pap.er, 4K 5K HD Wallpaper Application 💻 wireshark - Network analyzer and capture tool - without graphical user interface 🌐 path-finder - 💰 dash - API documentation browser and code snippet manager - 💰 Medis 2 - 💰 redisinsight GUI for streamlined Redis application development craft Native document editor input-source-pro Tool for multi-language users cleanshot Screen capturing tool cleanmymac-zh - Tool to remove unnecessary files and folders from disk - 💰 # brew list # brew list --cask # # ==> Casks # # arc # chromium # dbeaver-community # drawio # eudic # figma # firefox # fork # github # google-chrome # iina # imageoptim # iterm2 # itsycal # licecap # logitech-g-hub # mysqlworkbench # notion # openinterminal # orbstack # phpstorm # postman # qlstephen # raycast # sequel-ace # slack # snipaste # sourcetree # the-unarchiver # visual-studio-code # warp # wetype # youdaodict # zoom-for-it-admins # # 💻 brew install --cask adrive alfred google-chrome visual-studio-code brew install --cask visual-studio-code wetype youdaodict # 🌐 brew install --cask itsycal # 💅🏼 brew install --cask blender brew mas Mac App Store command-line interface nvm curl jmeter - Load testing and performance measurement application wget yarn protobuf - Protocol buffers (Google’s data interchange format) ripgrep recursively searches directories for a regex pattern while respecting your gitignore fish Manual charles - Web debugging Proxy application - 💰 Navicat Premium - 💰 oh-my-zsh ClashX Pro axure-rp - Planning and prototyping tool for developers - 💰 Badgeify Add Any App to Your Mac Menu Bar one-key-hidpi 3182x1332 App Store  Xnip - Handy Screenshot App for Mac iHosts - /etc/hosts 编辑器 Xiaomi Home # brew install mas # mas search Xnip # mas upgrade # Xnip mas install 1221250572 # iHosts mas install 408981434 # WeChat mas install 836500024 # QQ音乐 mas install 595615424 # Xcode mas install 497799835 # MoneyThings 记账 mas install 1549694221 # Xiaomi Home, needed manual install mas install 957323480 AI BoltAI TypingMind LobeChat Ollama 快捷键 Mac 键盘快捷键 Chrome 键盘快捷键 个性化设置 触发角：系统偏好设置 -> 桌面与屏幕保护程序 -> 屏幕保护程序 -> 触发角 – EOF – ...