tristanm

void setup() {
  pinMode(1, OUTPUT);
}

void loop() {
  if (getTemp() > 30) {
    digitalWrite(1, HIGH);
  } else {
    digitalWrite(1, LOW);

tristanm

void setup() {
  pinMode(1, OUTPUT);
}

void loop() {
  for(int i = 20; i <= 255; i++) {
    analogWrite(1, i);
    delay(1);
  }

tristanm

require 'fileutils'

glob_path = File.join(
  Rails.application.config.retail_plus_images_path,
  '*.{jpg,jpeg,png,gif}'
)

Dir.glob(glob_path).each do |src|
  basename = File.basename(src, '.*')
  dest = src.gsub(basename, basename + '_2')

tristanm

<%# Example of using OffsitePayments::ActionViewHelper to generate a form %>
<%= payment_service_for 'ORD123456', '[user id]', service: :pxpay, return_url: 'http://localhost:3000/pxpay/return', credential2: '[key]', currency: 'NZD', amount: 12.34 do |service| %>
    <%= submit_tag 'Pay Now' %>
<% end %>

<%# Example of generating a URL directly (see controller) %>
<%= link_to @service.credential_based_url, @service.credential_based_url %>

tristanm

module Concerns::Localizable
  extend ActiveSupport::Concern

  included do
    around_action :localize
  end

  def localize
    return false if set_locale === false
    yield

tristanm

Migrating a Rails project from MySQL to PostgreSQL

This brief guide is written from my own experience with migrating a large (~5GB) MySQL database to PostgreSQL for a Rails project.

No warranties, guarantees, support etc. Use at your own risk and, as always, ENSURE YOU MAKE BACKUPS FIRST!

I chose [pgloader][1] because it's extremely fast. YMMV.

1. Replace mysql2 gem with pg in Gemfile.
2. Update config/database.yml for PostgreSQL. I used [Rails' template][2] as a starting point.

tristanm

AllCops:
  RunRailsCops: true

# Fails in 0.21.0
Delegate:
  Enabled: false

tristanm

values = (0..12).to_a
values.product(values).each do |factors|
  product = factors[0] * factors[1]
  puts "#{factors[0]} x #{factors[1]} = #{product}"
end

tristanm

# Credit to https://github.com/jdpedrie/angularjs-ordinal-filter (which also doesn't work for 11, 12 and 13)

ghostBooking.filter "ordinal", ->
  (number) ->
    suffixes = ["th", "st", "nd", "rd"]
    value = number % 100 # The last two digits, e.g. 12345 % 100 => 45
    number + (suffixes[(l2d - 20) % 10] || suffixes[0])

tristanm

# Note does not ever include 5
((rand * 5) * 2).round / 2.0