LucasArruda

# Ruby on Rails console load error after brew update
# Library not loaded: /usr/local/opt/readline/lib/libreadline.7.dylib (LoadError)

ln -s /usr/local/opt/readline/lib/libreadline.8.0.dylib /usr/local/opt/readline/lib/libreadline.7.dylib

LucasArruda

Bundler 2.0

• Slowly being introduced as bundler starts to show it's age
• Already working well and coming out of beta
• Caching (github, gem, ext)
• Multi-source (now safe to do)
• No more platform issues (win vs linux vs unix)
• We should prepare to migrate soon

https://speakerdeck.com/segiddins/bundling-bundler-2-dot-0

LucasArruda

namespace :staging do
  desc 'create subdomain DNS record for Heroku review app'
  task :publish_dns do
    require 'dnsimple'
    require 'platform-api'

    STAGING_DOMAIN      = 'mystagingdomain.com'.freeze
    DNSIMPLE_ACCOUNT_ID = .freeze
    heroku_app_name    = ENV['HEROKU_APP_NAME']
    subdomain          = heroku_app_name.match(/.*(pr-\d+)/).captures.first

LucasArruda

config.assets.precompile += [

  # precompile any CSS or JS file that doesn't start with _
  /(^inline[^_\/]|\/[^_])[^\/]*.(js|css)$/,
  ...

LucasArruda

After automatically updating Postgres to 10.0 via Homebrew, the pg_ctl start command didn't work.
The error was "The data directory was initialized by PostgreSQL version 9.6, which is not compatible with this version 10.0."

Database files have to be updated before starting the server, here are the steps that had to be followed:

# need to have both 9.6.x and latest 10.0 installed, and keep 10.0 as default
brew unlink postgresql
brew install postgresql@9.6
brew unlink postgresql@9.6
brew link postgresql

LucasArruda

curl -O https://ufpr.dl.sourceforge.net/project/icu/ICU4C/58.2/icu4c-58_2-src.tgz
tar xzvf icu4c-58_2-src.tgz
cd icu/source
chmod +x runConfigureICU configure install-sh
./runConfigureICU MacOSX
make
sudo make install

LucasArruda

Friendly URLs

By default, Rails applications build URLs based on the primary key -- the id column from the database. Imagine we have a Person model and associated controller. We have a person record for Bob Martin that has id number 6. The URL for his show page would be:

/people/6

But, for aesthetic or SEO purposes, we want Bob's name in the URL. The last segment, the 6 here, is called the "slug". Let's look at a few ways to implement better slugs.

LucasArruda

#!/bin/sh

cd $(brew --prefix) && git fetch && git reset --hard origin/master
brew update

LucasArruda

function loadCss(url) {
  var link = document.createElement("link");
  link.type = "text/css";
  link.rel = "stylesheet";
  link.href = url;
  document.getElementsByTagName("head")[0].appendChild(link);
}

LucasArruda

var parser = document.createElement('a');
parser.href = "http://example.com:3000/pathname/?search=test#hash";

parser.protocol; // => "http:"
parser.hostname; // => "example.com"
parser.port;     // => "3000"
parser.pathname; // => "/pathname/"
parser.search;   // => "?search=test"
parser.hash;     // => "#hash"
parser.host;     // => "example.com:3000"