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. Inspired by and forked from Josh Branchaud.

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Categories

• Algorithms
• Vim
• Python
• JavaScript
• MySQL
• SAS
• Task runners
• Unit testing
• HTML/CSS
• React
• Node.js
• Umbraco CMS
• Chrome Dev Tools
• CSS
• Competitive Programming
• Servers
• Statistics
• Science related
• Other computing concepts

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Algorithms

• Big Oh vs. Big Theta vs. Big Omega

Vim

• Useful Vim commands

Python

• Connecting to and querying SQLite database

MySQL

• Resetting MySQL root password
• Changing MySQL user's password in command line
• Creating SQLite databases

Servers

• Heroku's ephemeral filesystem

SAS

• Ways to create empty dataset
• cntlin to merge datasets

JavaScript

• Touch device detection
• Speed based scrollTo
• Difference between tilde(~) and caret(^) in package.json
• Events capturing and bubbling
• Equality in JavaScript: == vs. ===
• Extending jQuery
• Function Expression vs. Function Declaration
• Looping objects
• Getting started with JavaScript promises
• const vs. let vs. var
• call vs. bind vs. apply
• Idiomatic JavaScript expressions using || and &&
• Detecting CSS media query changes/matches
• Functional programming in JavaScript: map, reduce, filter
• Default function parameters
• Sorting arrays in JavaScript
• Arrays manipulation (push or delete at specific index)
• Rest parameters
• Maps and sets in ES6
• Bitwise operators
• Template literals
• Use of instanceof and typeof
• Creating Objects
• Object Properties
• Prototypal Inheritance

Task runners

• CSS and JS injection Bower and Gulp

Unit testing

• Setting up Karma with Jasmine
• Jasmine test cases
• Testing Browserify modules with Karma and Jasmine

HTML/CSS

• Critical Rendering Path
• reCAPTCHA for spam detection

React

• React Project Setup
• Higher Order Components
• Components Lifecycle
• Reusable React components with NPM
• Testing React components with Jest
• Testing React components with Karma
• Syntactic Sugar

Node.js

• Reading command line arguments
• Using modules in Node.js
• Simple HTTP GET requests
• Sequential API calls
• Simple API server
• Express routes
• Express - serving static content
• Express - using view engine

Umbraco

• Razor Syntax
• Querying Page Properties
• Navigation Menu

Chrome Dev Tools

• DOMContentLoaded vs. load event
• Resource Timing
• Exploring HTTP/2
• JavaScript Breakpoints

CSS

• Understanding z-index

Competitive Programming

• Faster Ways to Print Data

Other computing concepts

• Buffers vs. streams

Statistics

• Bayes' Theorem
• Birthday Paradox

Science related

• Scientific method

Other TIL Collections

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

License

© 2017 Karolis Ramanauskas

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