[Ruby on Rails] How to Set favicon.ico with favicon_link_tag

Notes on setting favicon.ico in a Rails app via the favicon_link_tag helper.

Daylight Saving Time Specifications ~ Summer Time, Daylight Saving Time (DST)

A developer-focused summary of DST terminology and the PST ⇄ PDT switching rules to be aware of.

How to Configure Papertrail Log Notifications to Slack

Sending only important Heroku error logs to Slack by combining a saved Papertrail search with a Slack webhook.

How to Add Heroku Buildpacks to Build in Node.js, Ruby on Rails Order

Reordering Heroku buildpacks to Node.js before Ruby so Yarn and Webpacker install cleanly, via app.json and the CLI.

How to Update Heroku Command (heroku-cli) to the Latest Version

Updating heroku-cli to the latest version with Homebrew on macOS to silence the update available notice.

Heroku Recommended Free Add-ons

Free Heroku add-ons worth enabling early: Papertrail, Rollbar, SendGrid, and Deploy Hooks.

[Ruby on Rails] Setting for Always Using HTTPS Connection: config.force_ssl = true

Notes on enabling config.force_ssl = true in production.rb to force HTTPS connections in Rails.

[Ruby on Rails] Converting .erb Files to .haml Using erb2haml

Notes on batch-converting .erb view templates to .haml with haml-rails, erb2haml, and rake haml:replace_erbs.

How to Write a Procfile to Use Ruby on Rails 5 on Heroku's Free Tier

A Procfile for Rails 5 on Heroku's free tier, plus a walkthrough of puma's thread, port, and environment options.

Steps to Create Ruby on Rails 5 and Deploy to Heroku

End-to-end steps for spinning up a Rails 5 app and deploying it to Heroku with Heroku Postgres.

Heroku PostgreSQL Version Check Method and Command: heroku pg:info

Use heroku pg:info to confirm the version of Heroku PostgreSQL your app is running.

KeystoneJS Configuration Error: Please provide a `cookie secret` value for session encryption.

Fix the KeystoneJS cookie secret error on Heroku deploy by setting the COOKIE_SECRET env var.

[KeystoneJS] How to Change the Blog Feature URL from /blog

How to change the KeystoneJS blog feature URL from /blog to /news via a set of source diffs.

How to Create a Node.js CMS 'KeystoneJS' App and Deploy it to Heroku

Build a KeystoneJS CMS app and deploy it to Heroku with MongoDB and other add-ons.

Collection of Helpful Articles for Understanding and Implementing Idempotence in Design

A curated reading list on idempotence — concept, design patterns, REST/HTTP, and shell scripting.

List of Databases Available in Amazon RDS Free Tier

A list of which Amazon RDS database engines are eligible for the AWS Free Tier and which are not.

[DigitalOcean] Solution for 'You cannot create more than 10 droplets at a time' Error

Working around the 10-droplet batch limit when creating Droplets via the DigitalOcean API.

[Sass] Solution for Error: File to import not found or unreadable

Two ways to resolve the 'File to import not found or unreadable' error thrown by Sass (Scss) at @import time.

Should Shared Library Directory Be Named 'shared' or 'common'?

Should a shared-library directory be named `shared` or `common`? Linux, Rails, and Capistrano all pick `shared`.

[Ruby] Solution for ERROR: cannot discover where libxml2 is located on your system. please make sure `pkg-config` is installed.

Fixing nokogiri's libxml2/pkg-config install error on macOS by installing the libraries with Homebrew and using system-libraries.

[Slack] Cannot Restore Edited/Deleted Messages or View Edit History

Slack cannot restore edited or deleted messages, but admins can disable editing and deletion in settings.

Using Regular Expressions to Extract Strings After a Specific String [JavaScript Edition]

Sample JavaScript regex code for extracting the string that follows a specific label such as `Email address:`.

Pros and Cons of Using Bitcoin for Online Payments Based on My Experience

Pros and cons I noticed paying online with Bitcoin instead of a credit card in Portland.

[Sass] How to Introduce .scss-lint.yml and Recommended Settings

How to introduce scss-lint's .scss-lint.yml and a recommended customization example with per-rule reasoning.

Environment Setup Steps to Introduce Lint to Sass (.scss) with gulp-scss-lint

How to lint .scss files with gulp-scss-lint and the scss-lint gem, wired into a gulp task.

Seashore Stopped Launching on macOS Sierra

A memo on Seashore no longer launching on macOS Sierra, and switching over to Pixelmator instead.

The sass-convert Command for Converting CSS to Sass (Scss) is Convenient

Use the `sass-convert` command that ships with the sass gem to convert CSS to Sass / Scss.

Created .jshintrc Specialized for MongoDB Queries

A MongoDB-specific .jshintrc that registers mongo shell methods as globals to silence JSHint noise.

[GitHub] How to Sync a Forked Repository with the Original Repository

How to configure the original repository as upstream and pull in its latest changes for your fork.

Use npm-check-updates to update all package.json to latest versions and npm update

Using npm-check-updates (ncu) to rewrite package.json to the latest versions and then npm update.

Recreate and Start Containers with docker-compose up --force-recreate

How docker-compose up --force-recreate recreates containers before start, plus a per-container tip.

css2sass Service That Converts CSS to Sass/Scss is Super Convenient

How to use css2sass to convert CSS into properly nested Sass or SCSS in the browser.

What's the Difference Between Git and GitHub?

A link collection I hand out when someone asks how Git and GitHub differ.

[Let's Encrypt] Solution When 'Cert not yet due for renewal' Message Occurs with certbot renew

Understanding certbot renew's 'Cert not yet due for renewal' message and when to actually run manual renewal.

[Linux] Learning Sites for Understanding Swap (Japanese & English)

Red Hat documentation on Linux swap space in Japanese and English, useful for bilingual engineer training.

[JavaScript] Reference Information for Understanding Memory Management (Japanese & English)

MDN's Japanese and English Memory Management pages as reference material for learning JavaScript GC.

[Shippo] Unused USPS Labels are Automatically Refunded 30 Days After Creation

Shippo auto-refunds unused USPS labels 30 days after creation, or you can call the refunds API immediately.

[JavaScript/ES6] How to Use Single Quotes, Double Quotes, and Backticks

Using single quotes for string literals and backticks for template literals in ES6, based on MDN.

Build with docker-compose build --no-cache Without Using Cache

A quick note on docker-compose build --no-cache to rebuild without the build cache.

[JavaScript/ES6] Promise Usage, Introduction, and Learning Resources Summary

Introductory articles, an e-book, a Workshopper module, and explainers for learning ES6 Promises.

How to Auto-Renew Let's Encrypt SSL Certificates with certbot and crontab

Setting up monthly auto-renewal of Let's Encrypt certificates with certbot and crontab.

[Ubuntu] Solution for 'sudo: add-apt-repository: command not found' Error

Fixing 'add-apt-repository: command not found' on Ubuntu by installing software-properties-common.

[JavaScript] Extract Only the Domain Part After @ from Email Address

A short sample that uses String.prototype.split() to pull the domain part out of an email address.

PDXNode Presentation Night July 2017 Participation Report

A recap of PDXNode Presentation Night in July 2017, the Portland Node.js community meetup.

Mac App 'Muzzle' That Can Turn Off Notifications During Video Calls is Super Convenient

Introducing Muzzle, a Mac app that silences notifications during video calls.

PO (purchase order) = Purchase Order, Order Form, Purchase Instruction

PO = Purchase Order, and sometimes Product Owner or Project Owner — a quick reference to disambiguate the term.

[WordPress] Couldn't Edit Category from Admin Panel, So Resolved by Updating Database

Working around a WordPress category permission error by updating wp_terms directly in MySQL.

Make life easier with cron format checking services

Two web services that make cron expressions easier: crontab.guru for English and Cron Builder for Japanese GUI users.

[macOS Sierra] Solution to Stop Showing 'Enter passphrase for key' Every Time

Adding UseKeychain and AddKeysToAgent to ~/.ssh/config stops macOS Sierra from asking for the SSH passphrase every time.

Leadership Anti-patterns

Five leadership anti-patterns I identified from a real workplace experience.