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String join in non empty

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Mirrors
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    光速搭建带有图床的博客
    
    08
    08
    
    comptime? runtime? launchtime!
    
    不同文档博客的标记语法
    
    为何不应该透露家里的难事
    
    引号的滥用
    
    文章天成，妙手偶得
    
    神秘的3天旅行包
    
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    K means n hac n dbscan
    
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    单一市场
    
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    0 汇编相关
    
    1 指令集计算
    
    3 内存布局
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    Jfmfoi
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    24.08.17
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    Jfmfoi
    
    William
    William
    
    Note
    
    240914
    240914
    
    教学计划差分与离散化
    
    240921
    240921
    
    教学计划找规律
    
    240929
    240929
    
    教学计划找规律II
    
    课堂要点
    
    241013
    241013
    
    课堂计划
    
    241020
    241020
    
    课堂计划
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    Typst
    
    Remote
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    Rustdesk
  - 技术学习
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    Acm
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    失误日志
    
    D2l
    D2l
    
    10.1.queries keys values
    
    10.2.注意力汇聚
    
    3.0.1.损失函数
    
    3.0.激活函数
    
    3.2.linear regression scratch
    
    3.4.softmax
    
    4.2.mlp
    
    4.3.mlp concise
    
    4.5.weight decay
    
    4.5.权重衰减
    
    4.6.dropout
    
    5.2.参数管理
    
    6.0.卷积基础
    
    7.1.alexnet
    
    7.2.vgg
    
    7.3.nin
    
    7.4.googlenet
    
    7.5.BN
    
    7.6.resnet
    
    7.7.densenet
    
    8.1.sequence
    
    8.3.语言模型和数据集
    
    8.4.RNN
    
    8.5.rnn scratch
    
    8.6.rnn concise
    
    8.7.bptt
    
    9.1.gru
    
    9.3.deep rnn
    
    9.4.bi rnn
    
    9.5.dataset
    
    9.6.encoderdecoder
    
    9.7.seq2seq
    
    9.8.beam search
    
    快速配置 d2l
    
    词汇表
    
    问题
    
    Hrl
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    1 概述
    
    2 多臂老虎机
    
    3 马尔科夫决策过程
    
    4 动态规划算法
    
    Oi
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    证明基础
    
    信号处理
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    机械臂
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    分布
    
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    Clean cache
    
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    Connect usb
    
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    Nvidia smi missing after installling cuda
    
    Vscode
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    Vscode cannot connect to remote Linux （_WebSocket close with status code 1006)
Softwares and tools
Softwares and tools
- Harmless useful tools
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  - Show apt installed packages
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    Julyfun
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    list all builtins
  - String
    String
    
    Get string length
    
    String empty or unset
    
    String join in non empty
    
    String regex get variable
    
    String sub
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    Test n and z
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  - Git status 显示中文乱码
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  - 从历史中删除大文件
  - Add
    Add
    
    Revert git add
  - Branch
    Branch
    
    Delete a remote branch
    
    Fix when remote default branch is renamed
    
    Get current branch name
    
    Git branch
  - Clone
    Clone
    
    Clone certain branch
    
    Clone certain version
    
    Git shallow clone local repo
  - Commit
    Commit
    
    Revert last commit
    
    没有检出一个提交
  - Config
    Config
    
    Show config
    
    Where is git config file
  - Conflict
    Conflict
    
    choose Conflicts in rebase
  - Diff
    Diff
    
    Diff staged or unstaged
    
    Diff vs status
    
    How to compare a local git branch with its remote branch
  - Init
    Init
    
    Convert a existing non empty directory to git
  - Lfs
    Lfs
    
    error: external filter 'git-lfs filter-process' failed
  - Log
    Log
    
    Git log command search content
    
    Git log oneline date author
    
    Git log show commit details
  - Pull
    Pull
    
    Git pull local and remote conflict
    
    Need to specify how to reconcile divergent branches when git pull
  - Remote
    Remote
    
    Create new branch in remote
  - Reset
    Reset
    
    Revert last commit
  - Restore
    Restore
    
    Discard changes or restore a file
    
    Restore cur dir
  - Stage
    Stage
    
    Show stages
  - Submodule
    Submodule
    
    Add exisiting local git repo as submodule as a submodule to parent directory repo?
    
    Clone or update submodule
    
    Shallow clone
    
    Update all submodules to latest commit
  - Tag
    Tag
    
    Create a tag in a github repository
    
    Rename tag
    
    Tag
  - Workflow
    Workflow
    
    Workflow by Gao Tian
- Ide
  Ide
  - Android studio
    Android studio
    
    Export apk
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  Mysql
  - Start on macos
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  - E303 Unable to open swap file
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  - Delete between underscores
  - Jump to next python func
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  - Waka time where to enter api key
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    Download failed
    
    Packer always say error running config
  - Vim plug
    Vim plug
    
    Deal with vim plug download failure
    
    Use vim plug
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  - Subdomain
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  Node
  - Npm install hangs on sill idealtree build
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  Ntp
  - ntp synchronize time
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  - Cuda errors
  - Install multiple cuda versions and switch between them
  - Nvcc shows wrong version
  - Nvidia docker on ubuntu 16 04
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  - Old nvidia smi or called driver
  - Record nvidia smi fix 230918
  - Show how many gpu you have
  - Watch nvidia gpu in real time
  - Install
    Install
    
    Install nvidia-smi and cuda from zero
    
    on ubuntu
    
    Windows
    Windows
    
    install nvidia-driver
- Obs
  Obs
  - Crop the recording area
- Obsidian
  Obsidian
  - Resize image
- Postgresql
  Postgresql
  - Start on mac vscode
- Recommendations
  Recommendations
  - I want to draw geometry pics with letters and marks online
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  Shells
  - Change default shell
  - Displays icons error
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  Slack
  - 安卓手机通知
- Sogou pinyin
  Sogou pinyin
  - Install on ubuntu20.04
  - 拼音模式下居然在拼英文是什么情况
- Ssh
  Ssh
  - Copy remote multiple files
  - Failed to connect any ssh host
  - Ssh copy id
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  - To mac
    To mac
    
    ssh mac from win
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  - Close all without confirmation
  - Load init vim
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  Unity
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  Unix cli
  - Awk
  - Background run
  - Better top
  - Change newline style
  - Cli wifi
  - Count lines in directory
  - Curl
  - Extract nth line of an output
  - File size
  - Get file s path and file name
  - Grep
  - Only stderr output to less
  - Print all env parameter
  - Really clear screen
  - Scp
  - See if i am sudoer
  - Show process mem
  - Show shell
  - Sort based on directories size
  - Switch user
  - Unexport
  - Ln
    Ln
    
    How to list symbolic link chains?
  - Ls
    Ls
    
    get the most recent file in directory shell
  - String
    String
    
    Filter lines starting with k4a
    
    Filter out those containing a specfig pattern
  - Tar
    Tar
    
    Unzip tar file
    
    Unzip xz file
  - Tmux
    Tmux
    
    Enable mouse
    
    how to set up config.fish to auto run tmux every time start fish
- Vim cheatsheat
  Vim cheatsheat
- Vim tutorial
  Vim tutorial
  - 简易 vim 教程
- Vmware
  Vmware
  - Cant uninstall on win11
- Vscode
  Vscode
  - Choose a python virtual environment
  - Different tab sizes depending on the language file im programming in vs code
  - Disable a extension in workspace
  - Error loading webview: Error: Could not register service workers: TypeError: Failed to register a ServiceWorker for scope
  - Extension list
  - Format python.1
  - Install on ubuntu
  - Show file git changes
  - Clangd
    Clangd
    
    Cant find bits std c h on macos
    
    Cant find std header file like algorithm
    
    Strange recovery methods
    
    Install
    Install
    
    To install
  - Debug
    Debug
    
    C cmake debug
    
    C cpp direct file debug
    
    Python
    Python
    
    Python debug
    
    Set the working directory
  - Extensions
    Extensions
    
    Neovim
    Neovim
    
    Deal with E79 at start and buftype error at save
    
    Dont show output message
    
    Failed to start nvim nvim_execute_lua
  - Jupyter
    Jupyter
    
    Show line number
  - Linux
    Linux
    
    Linux vscode 无法输入中文
    
    固定 ip
  - Python
    Python
    
    Pylance cant find some modules
    
    Pylance not working at all
  - Remote ssh
    Remote ssh
    
    Remote ssh failed
  - Setup
    Setup
    
    Setup basic things like devcpp
  - Ui
    Ui
    
    Adjust rulers
    
    Auto fold line word wrap
    
    Developer tool webview
    
    Do not show reference count before items
    
    UI-components names
    
    What are those ui components and bars called
  - Windows
    Windows
    
    Setup clangd, cmake just like on unix
- Zed
  Zed
  - Setup conda virtual env
- Zerotier
  Zerotier
  - Build your zerotier lan for mac win and wsl and android
Website
Website
- Valine blog comment
- 申请 SSL 证书
- Huggingface
  Huggingface
  - Download
    Download
    
    Set mirror
- Zhihu
  Zhihu
  - click all invite

String join in non empty

string join -n '/' a b "" d

this gives a/b/d.

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