TIL

Today I Learned

A collection of concise write-ups on small things I learn day to day across a variety of languages and technologies. These are things that don't really warrant a full blog post. These are mostly things I learn by pairing with smart people at Hashrocket.

clojure

• Expanding Macros
• Quick Clojure Docs
• Specify the Directory of a Shell Command
• Splitting On Whitespace
• Swap Two Items in a Vector
• Type of Anything

devops

• Check The Status of All Services
• Push Non-master Branch To Heroku
• Reload The nginx Configuration
• Wipe A Heroku Postgres Database

git

• Accessing a Lost Commit
• Amend Author Of Previous Commit
• Checkout Old Version Of A File
• Checkout Previous Branch
• Clean Out All Local Branches
• Delete All Untracked Files
• Dry Runs in Git
• Excluding Files Locally
• Ignore Changes To A Tracked File
• Intent To Add
• Last Commit A File Appeared In
• List Filenames Without The Diffs
• List Untracked Files
• Single Key Presses in Interactive Mode
• Staging Changes Within Vim
• Staging Stashes Interactively
• Stashing Only Unstaged Changes
• Stashing Untracked Files
• Verbose Commit Message

go

• Not So Random

javascript

• Character Codes from Keyboard Listeners
• Throttling A Function Call
• Truthiness of Integer Arrays

postgres

• Auto Expanded Display
• Checking The Type Of A Value
• Configure The Timezone
• Count Records By Type
• Default Schema
• Edit Existing Functions
• Extracting Nested JSON Data
• Fizzbuzz With Common Table Expressions
• Generate Series Of Numbers
• Intervals Of Time By Week
• Limit Execution Time Of Statements
• List All Columns Of A Specific Type
• List All Versions Of A Function
• Send A Command To psql
• Special Math Operators
• String Contains Another String
• Temporarily Disable Triggers
• Temporary Tables
• Timestamp Functions
• Toggling The Pager In PSQL
• Turning Timing On
• Use Argument Indexes
• Using Intervals To Offset Time
• Who Is The Current User
• Word Count for a Column

rails

• All or Nothing Database Transactions
• Attribute Getter without the Recursion
• Attribute Was
• Capybara Page Status Code
• Conditional Class Selectors in Haml
• Creating Records of Has_One Associations
• Ignore Poltergeist JavaScript Errors
• Pretend Generations
• Retrieve An Object If It Exists
• Select Value For SQL Counts
• Show Pending Migrations

ruby

• Are They All True?
• Comparing Class Hierarchy Relationships
• Create an Array of Stringed Numbers
• Destructuring Arrays In Blocks
• Disassemble Some Codes
• Editing Code In Pry
• Evaluating One-Off Commands
• FactoryGirl Sequences
• Finding The Source of Ruby Methods
• Limit Split
• Listing Local Variables
• Override The Initial Sequence Value
• Parallel Bundle Install
• Percent Notation
• Question Mark Operator
• Squeeze Out The Extra Space
• Summing Collections

tmux

• Adjusting Window Pane Size
• Create A Named tmux Session
• Cycle Through Layouts
• List All Key Bindings
• Organizing Windows
• Reclaiming The Entire Window
• tmux in your tmux

vim

• The Black Hole Register
• Buffer Time Travel
• Check Your Current Color Scheme
• Close the Current Buffer
• Coerce The Current Filetype
• Count the Number of Matches
• Create A New File In A New Directory
• Edges Of The Selection
• End Of The Word
• Generate and Edit Rails Migration
• Head of File Name
• Help For Non-Normal Mode Features
• Horizontal to Vertical and Back Again
• Incremental Searching
• Interactive Buffer List
• Joining Lines Together
• List All Buffers
• List Of Plugins
• Marks Across Vim Sessions
• Moving To A Specific Line
• NETRW Listing Styles
• Open an Unnamed Buffer
• Opening a URL
• Preventing Typos with Abbreviations
• Previous Buffer
• Previous Visual Selection
• Quick File Info
• Quick Man Pages
• Quick Quickfix List Navigation
• Re-indenting Your Code
• Rename Current File
• Repeat The Previous Change
• Replace A Character
• Scrolling Relative to the Window
• Set End Of Line Markers
• Set Your Color Scheme
• Split Different
• Swap Occurrences Of Two Words
• Tabs To Spaces
• The Vim Info File
• Verbose Commits With Fugitive
• View Commit History of a File
• Viewing Man Pages with man.vim
• Vim Without The Extras
• Whole Line Auto-Completion
• Wrap With Some Room

zsh

• All The Environment Variables
• Cat A File With Line Numbers
• Check If A Port Is In Use
• Clear The Screen
• Create A File Descriptor with Process Substitution
• Killing A Frozen SSH Session
• List All The Say Voices
• Repeat Yourself
• Saying Yes
• Search History
• SSH With Port Forwarding
• Switch Versions of a Brew Formula
• Watch The Difference
• Watch This Run Repeatedly
• Where Are The Binaries?

About

I shamelessly stole this idea from thoughtbot/til.

Other TIL Collections

• Today I Learned by Hashrocket
• jwworth/til
• thoughtbot/til

License

© 2015 Josh Branchaud

This repository is licensed under the MIT license. See LICENSE for details.