| 2.hours.ago # => Fri, 02 Mar 2012 20:04:47 JST +09:00 | |
| 1.day.from_now # => Fri, 03 Mar 2012 22:04:47 JST +09:00 | |
| Date.today.to_time_in_current_zone # => Fri, 02 Mar 2012 22:04:47 JST +09:00 | |
| Date.current # => Fri, 02 Mar | |
| Time.zone.parse("2012-03-02 16:05:37") # => Fri, 02 Mar 2012 16:05:37 JST +09:00 | |
| Time.zone.now # => Fri, 02 Mar 2012 22:04:47 JST +09:00 | |
| Time.current # Same thing but shorter. (Thank you Lukas Sarnacki pointing this out.) | |
| Time.zone.today # If you really can't have a Time or DateTime for some reason | |
| Time.zone.now.utc.iso8601 # When supliyng an API (you can actually skip .zone here, but I find it better to always use it, than miss it when it's needed) | |
| Time.strptime(time_string, '%Y-%m-%dT%H:%M:%S%z').in_time_zone(Time.zone) # If you can't use Time#parse |
This is a collection of the things I believe about software development. I have worked for years building backend and data processing systems, so read the below within that context.
Agree? Disagree? Feel free to let me know at @JanStette. See also my blog at www.janvsmachine.net.
Keep it simple, stupid. You ain't gonna need it.
If your master.key has been compromised, you might want to regenerate it.
No key regeneration feature at the moment. We have to do it manually.
rails credentials:show somewhere temporarily.config/master.key and config/credentials.yml.encEDITOR=vim rails credentials:edit in the terminal: This command will create a new master.key and credentials.yml.enc if they do not exist.config/credentials.yml.enc
| def paginate(scope, default_per_page = 20) | |
| collection = scope.page(params[:page]).per((params[:per_page] || default_per_page).to_i) | |
| current, total, per_page = collection.current_page, collection.num_pages, collection.limit_value | |
| return [{ | |
| pagination: { | |
| current: current, | |
| previous: (current > 1 ? (current - 1) : nil), | |
| next: (current == total ? nil : (current + 1)), |
| # spec/support/timezone.rb | |
| module TimeZoneHelpers | |
| extend ActiveSupport::Concern | |
| def self.randomise_timezone! | |
| offsets = ActiveSupport::TimeZone.all.group_by(&:formatted_offset) | |
| zones = offsets[offsets.keys.sample] # Random offset to better vary the time zone differences | |
| Time.zone = zones.sample # Random zone from the offset (can be just 1st, but let's do random) | |
| puts "Current rand time zone: #{Time.zone}. Repro: Time.zone = #{Time.zone.name.inspect}" | |
| end |
| require 'socket' | |
| # 1. Create | |
| # AF_INET means IPv4 (xxx.xxx.xxx.xxx) | |
| # SOCK_STREAM means communicating with a stream (TCP) | |
| # | |
| # Can be simplified to symbols :INET and :STREAM, respectively | |
| server = Socket.new(Socket::AF_INET, Socket::SOCK_STREAM) |
| AllCops: | |
| RunRailsCops: true | |
| # Commonly used screens these days easily fit more than 80 characters. | |
| Metrics/LineLength: | |
| Max: 120 | |
| # Too short methods lead to extraction of single-use methods, which can make | |
| # the code easier to read (by naming things), but can also clutter the class | |
| Metrics/MethodLength: |
| brew tap homebrew/versions | |
| brew install v8-315 | |
| gem install libv8 -v '3.16.14.13' -- --with-system-v8 | |
| gem install therubyracer -- --with-v8-dir=/usr/local/opt/v8-315 | |
| bundle install |
| source 'https://rubygems.org' | |
| gem "graphql", github: "rmosolgo/graphql-ruby", branch: "subscriptions" | |
| gem "sinatra" | |
| gem "thin" |
This procedure explains how to install MySQL using Homebrew on macOS Sierra 10.12
$ /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"At this time of writing, Homebrew has MySQL version 5.7.15 as default formulae in its main repository :