Tils • Tuan Tran

Posted on 24 Apr 2025

Pessimistic Version Contraint
Posted on 07 Feb 2025

[Obsidian] Collapsing a section
Posted on 14 Sep 2024

Free DB hosting
Posted on 10 Sep 2024

Mysql get Optimizer Trace
Posted on 08 Sep 2024

Translate ebooks
Posted on 30 Aug 2024

Mysql - Calculate table size
Posted on 21 Aug 2024

Use VIA app for keymap
Posted on 18 Aug 2024

Fix blur text on Kindle
Posted on 22 Jul 2024

Singleton class/method in Ruby
Posted on 01 Jul 2024

Copy protected content from Google doc
Posted on 23 May 2024

MacOS - skhd hotkey
Posted on 12 Apr 2024

Vim - Join multiple lines
Posted on 26 Mar 2024

Rails - Add configuration for Zeitwerk to get perfect namespaces
Posted on 04 Mar 2024

Ruby - the context of HTTP requests
Posted on 24 Jan 2024

ctags for Ruby libs
Posted on 10 Dec 2023

Ruby - Working with temporary file
Posted on 29 Nov 2023

Send multiple images with Slack API
Posted on 24 Oct 2023

[Obsidian] Debug Dataviewjs script
Posted on 14 Aug 2023

Skip auto updates for brew install
Posted on 12 Jul 2023

Vim - Pretty JSON
Posted on 20 Jun 2023

Vim - Search and Replace in project
Posted on 04 May 2023

Homebrew: Install an older version of a formular
Posted on 30 Apr 2023

Patched Fonts
Posted on 24 Apr 2023

Navigating project with vim-projectionist
Posted on 19 Apr 2023

Hide files in NERDTREE
Posted on 13 Jan 2023

RSpec - Disable 'process' carrierwave to improve RSpec performance
Posted on 20 Dec 2022

Vim - Delete from character to end of line
Posted on 16 Nov 2022

Mysql - Query with trailing spaces
Posted on 07 Nov 2022

Rails config for
Posted on 03 Nov 2022

Docker DNS
Posted on 25 Sep 2022

Git - Unignore a subfolder
Posted on 01 Sep 2022

Ruby - Numeric quo() function
Posted on 30 Aug 2022

MacOS - Shortcut to navigate app menus
Posted on 04 Aug 2022

Use Lambda Layer to reduce lambda function size
Posted on 19 Jul 2022

Mermaid - Helping tool to create diagrams and visualizations
Posted on 13 Jul 2022

Rails 7 - 'associated' query method to check association presence
Posted on 13 Jun 2022

Git - Debuging with git bisect
Posted on 30 May 2022

Git - Search string in Git history
Posted on 28 May 2022

Spreadsheet tricks
Posted on 03 Mar 2022

Rails - Trace source of deprecation warnings
Posted on 10 Feb 2022

`tr` vs `gsub`
Posted on 20 Jan 2022

URL, URN, URI and URI.escape in Ruby
Posted on 25 Dec 2021

Rails - find_each
Posted on 16 Nov 2021

Vim - Delete duplicated lines
Posted on 15 Nov 2021

Vim - Search and Replace
Posted on 06 Nov 2021

compact_blank in Rails
Posted on 31 Oct 2021

Vim - 101 hacks
Posted on 11 Oct 2021

Vim - tempname()
Posted on 08 Oct 2021

Vim jump to request spec file
Posted on 07 Oct 2021

Personal Script to get daily profit
Posted on 03 Oct 2021

Ruby - Firebase SCrypt in Ruby
Posted on 22 Sep 2021

Typing faster
Posted on 22 Jul 2021

RVM setup for linux cron
Posted on 26 Jun 2021

Mysql search with md5 hashed uuid
Posted on 04 Jun 2021

Rails - Export all routes to csv file
Posted on 16 May 2021

MacOS Show wifi detail
Posted on 08 May 2021

MacOS screenshot to clipboard
Posted on 04 Apr 2021

Vim - Retab
Posted on 05 Mar 2021

Rails - `bundle open` gem source
Posted on 08 Feb 2021

Ruby - IRB easter egg
Posted on 18 Jan 2021

Get stack trace object in Ruby
Posted on 08 Dec 2020

grep, awk and sed
Posted on 01 Dec 2020

Crawl data with Google App Script
Posted on 27 Nov 2020

What does 'rc' mean in dotfile
Posted on 17 Nov 2020

Vim - Ag search with specific file type
Posted on 10 Nov 2020

Rails - Pry gem aliases
Posted on 09 Nov 2020

Referer vs Referrer
Posted on 27 Oct 2020

Benford's Law
Posted on 25 Aug 2020

Ruby Core API vs Standard Library
Posted on 24 Aug 2020

Mortal and Immortal symbols in Ruby
Posted on 13 Aug 2020

`scp` copy multiple files
Posted on 06 Aug 2020

Debug zsh startup time
Posted on 24 Jul 2020

Floating point math
Posted on 24 Jul 2020

Rspec - Negated matcher
Posted on 24 Jul 2020

Rspec - Predicate matchers
Posted on 23 Jul 2020

Linux - Running background commands
Posted on 19 Jul 2020

Fold in Vim
Posted on 19 Jul 2020

Javascript Runtime in Rails application
Posted on 12 Jul 2020

Difference between URL path ends with trailing slash or not
Posted on 12 Jul 2020

Tmux swap panes
Posted on 12 Jul 2020

Why we need 'Bearer' before token in 'Authorization' header?
Posted on 24 May 2020

What is blob url?
Posted on 27 Apr 2020

Rspec - Set format json for request
Posted on 26 Apr 2020

Rspec - specific_specs options
Posted on 24 Apr 2020

Rails - `rails notes` command
Posted on 23 Apr 2020

Rails - Delete record with condition by using destroy_by
Posted on 22 Apr 2020

MacOS - Alfred file actions
Posted on 22 Apr 2020

Vimium use Alt key for mapping on MacOS
Posted on 21 Apr 2020

Vim edit file on remote server
Posted on 19 Apr 2020

How to delete git submodule
Posted on 19 Apr 2020

Install an older version of a Homebrew package
Posted on 19 Apr 2020

Rails - Bundle a private gem
Posted on 19 Apr 2020

Redirecting Github Pages to new site
Posted on 15 Apr 2020

Brew or Brew Cask
Posted on 30 Mar 2020

Mysql doesn't validate NULL on checking unique
Posted on 27 Mar 2020

Rails - Error handler order
Posted on 27 Mar 2020

Using fullscreen mode for splited window
Posted on 25 Mar 2020

Rails routes list existing resources
Posted on 22 Mar 2020

Rails - ActionController::ParamsWrapper
Posted on 16 Mar 2020

Alias for the last command
Posted on 16 Mar 2020

Rails - Pivot table's naming convention
Posted on 15 Mar 2020

Mysql TEXT vs VARCHAR(M)
Posted on 15 Mar 2020

Mysql TINYINT(1) vs BOOLEAN
Posted on 02 Jan 2020

Mysql order by boolean
Posted on 21 Nov 2019

Rspec - Mock vs Stub
Posted on 19 Nov 2019

Can't stay logged in on Google Chrome
Posted on 18 Nov 2019

Vuejs - Great time to make AJAX call
Posted on 14 Nov 2019

Scoped in CSS
Posted on 05 Nov 2019

Rails - Get unused routes of your rails applications
Posted on 02 Nov 2019

Docker build hangs/crashes when useradd with large UID
Posted on 01 Nov 2019

Rails - Carrierwave and Load Balancing problem
Posted on 01 Nov 2019

Rails - Mailer problem with sidekiq
Posted on 30 Aug 2019

Git - Delete multiple branches
Posted on 08 Aug 2019

Rspec - Shared example naming convention
Posted on 15 Jul 2019

Vim - Delete line with parttern
Posted on 24 Jun 2019

Git - Git Hooks
Posted on 24 Jun 2019

How rbenv works
Posted on 24 Jun 2019

Rspec - Factory Girl create list
Posted on 24 Jun 2019

Rspec - Factory usage
Posted on 18 Jun 2019

Vimium useful shortcuts
Posted on 03 Jun 2019

`b` A hidden method for Ruby String
Posted on 02 Jun 2019

Create default MySQL user and MySQL database on Docker
Posted on 02 Jun 2019

Git - Config multiple accounts in a single machine
Posted on 22 May 2019

How cron work?
Posted on 13 May 2019

Ruby - Create an Array with a single Hash witout the curly braces
Posted on 20 Feb 2019

Fast Ruby
Posted on 12 Feb 2019

Rails - Some style guide
Posted on 04 Jan 2019

Docker --rm flag
Posted on 05 Nov 2018

Rails - `before_action` in inheritance
Posted on 05 Nov 2018

Ruby - Local variables
Posted on 04 Aug 2018

Rails - Create another version from existed version image in Carriwerwave
Posted on 04 Aug 2018

Rails - Disable rubocop for specific directory
Posted on 04 Aug 2018

Rails - Validate presence for boolean field
Posted on 18 Jul 2018

Rails - Update attributes of a record
Posted on 27 Jun 2018

Javascript send/pass value of child window to parent window
Posted on 03 Apr 2018

Vimium Yank a link
Posted on 03 Mar 2018

Ruby - Lazy evaluation
Posted on 17 Jan 2018

Curry in Ruby
Posted on 10 Jan 2018

Git - Fix conflict in binary file
Posted on 22 Nov 2017

Ruby - 5 pry features every Ruby dev should know
Posted on 22 Nov 2017

Ruby - bsearch
Posted on 21 Nov 2017

Ruby - Heredoc
Posted on 19 Nov 2017

Rails - Create your own generator
Posted on 17 Nov 2017

Vim - Auto save
Posted on 04 Nov 2017

Mysql detect slow logs
Posted on 17 Oct 2017

Vim - Uppercase in visual mode
Posted on 08 Oct 2017

Vim - Do simple match
Posted on 08 Oct 2017

Vim - Toggle the free end of a selection
Posted on 03 Oct 2017

`chmod` in unix
Posted on 02 Oct 2017

Code android app with ruby
Posted on 20 Jul 2017

Rails - `rails console` can't start
Posted on 09 Jun 2017

Mysql search Vietnamese text
Posted on 29 Mar 2017

Git - Show all changed files in latest commit
Posted on 29 Mar 2017

Rails - `validate_with`
Posted on 28 Mar 2017

Rails - `content_for`
Posted on 27 Mar 2017

Rails - Counter cache
Posted on 27 Mar 2017

Rails - Open file pdf
Posted on 27 Mar 2017

Rails - Ordering active record
Posted on 27 Mar 2017

Rails - find_each
Posted on 27 Mar 2017

Zoombie process
Posted on 18 Mar 2017

Git - Change history commits of an user
Posted on 18 Mar 2017

MacOS take screenshot
Posted on 18 Mar 2017

Vector in C
Posted on 10 Mar 2017

MacOS find file
Posted on 22 Feb 2017

Javascript `noscript` tag
Posted on 20 Dec 2016

Rails - Count lines of code on Rails project
Posted on 28 Nov 2016

Copy in tmux
Posted on 28 Nov 2016

Git - Commit without editing message
Posted on 28 Nov 2016

Vim - Change list
Posted on 28 Nov 2016

Vim - Copy in command mode
Posted on 28 Nov 2016

Vim Surround on .erb file
Posted on 24 Nov 2016

Rails - Automatic validate has_many association
Posted on 17 Nov 2016

Vim - Working with windows
Posted on 10 Nov 2016

Google translate makes your form went wrong
Posted on 10 Nov 2016

Rails - Use `exists?`
Posted on 10 Nov 2016

env.example file
Posted on 03 Nov 2016

Call last command on terminal
Posted on 20 Oct 2016

Rails - Store hash in i18n
Posted on 19 Oct 2016

Auto DDOS with hulk.py
Posted on 19 Oct 2016

Rails - Turbolink
Posted on 11 Oct 2016

Rails - Clean your routes
Posted on 11 Oct 2016

Ruby - Compare concat vs join
Posted on 02 Oct 2016

Git - Undo if you deleted a local branch
Posted on 01 Oct 2016

Lastpass extension open login dialog
Posted on 28 Sep 2016

Ruby - irb tricks
Posted on 17 Sep 2016

Rails - `html_safe` vs `sanitize`
Posted on 29 Aug 2016

Delete file on linux
Posted on 18 Aug 2016

Javascript detect device
Posted on 12 Aug 2016

Git - Pull all pull requests
Posted on 12 Aug 2016

Rails - object reload
Posted on 09 Aug 2016

Rails - Single Table Inheritance
Posted on 04 Aug 2016

Rails - PATCH and PUT
Posted on 02 Aug 2016

Vim - Replace new line
Posted on 01 Aug 2016

Git - Ignore file local
Posted on 28 Jul 2016

Git - Show file in other branch
Posted on 26 Jul 2016

Structure and Unions in C
Posted on 23 Jul 2016

Session and Cookie
Posted on 22 Jul 2016

Vimperator back/foward on history
Posted on 22 Jul 2016

Vimperator open bookmark
Posted on 20 Jul 2016

Rails - Reduce instance variable on controller
Posted on 19 Jul 2016

Rails - Custom error html on form
Posted on 17 Jul 2016

Using fullscreen mode for splited window
Posted on 17 Jul 2016

Vim - Show all help
Posted on 17 Jul 2016

Vim - Sorting
Posted on 17 Jul 2016

Vim - The power of `g`
Posted on 15 Jul 2016

Vimperator insert text like vim-mode
Posted on 14 Jul 2016

User zsh with vim mode
Posted on 13 Jul 2016

Search history command
Posted on 12 Jul 2016

Vim - Reformat file
Posted on 11 Jul 2016

Rails - I18n lazy load
Posted on 11 Jul 2016

Vim Surround on .erb file
Posted on 28 Jun 2016

Register
Posted on 25 Jun 2016

How linux startup
Posted on 16 Jun 2016

Vim and Ctags
Posted on 13 Jun 2016

Mysql connect remote server
Posted on 01 Jan 0001