I've been following this blog post on how to set up an api-only Rails 5 application. One of the sections talks about creating a subdomain for your api
Rails.application.routes.draw do
constraints subdomain: "api" do
scope module: "api" do
require "active_record" | |
ActiveRecord::Base.establish_connection(adapter: "sqlite3", database: ":memory:") | |
ActiveRecord::Migration.class_eval do | |
create_table(:records) do |t| | |
t.string :column | |
end | |
end | |
data = 50_000.times.map { |i| Hash[column: "Column #{i}"] } |
I've been following this blog post on how to set up an api-only Rails 5 application. One of the sections talks about creating a subdomain for your api
Rails.application.routes.draw do
constraints subdomain: "api" do
scope module: "api" do
All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.
Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.
elem.offsetLeft
, elem.offsetTop
, elem.offsetWidth
, elem.offsetHeight
, elem.offsetParent
Note: these are pretty rough notes I made for my team on the fly as I was reading through some pages. Some could be mildly inaccurate but hopefully not terribly so. I might resort to convenient fiction & simplification sometimes.
My top contenders, mostly based on popularity / community etc:
Mostly about MVC (or derivatives, MVP / MVVM).
EMOJI CHEAT SHEET
Emoji emoticons listed on this page are supported on Campfire, GitHub, Basecamp, Redbooth, Trac, Flowdock, Sprint.ly, Kandan, Textbox.io, Kippt, Redmine, JabbR, Trello, Hall, plug.dj, Qiita, Zendesk, Ruby China, Grove, Idobata, NodeBB Forums, Slack, Streamup, OrganisedMinds, Hackpad, Cryptbin, Kato, Reportedly, Cheerful Ghost, IRCCloud, Dashcube, MyVideoGameList, Subrosa, Sococo, Quip, And Bang, Bonusly, Discourse, Ello, and Twemoji Awesome. However some of the emoji codes are not super easy to remember, so here is a little cheat sheet. โ Got flash enabled? Click the emoji code and it will be copied to your clipboard.
People
๐
These two matchers are referenced from the blog post Segment.io and Ruby.
A state machine is defined as follows:
Input
- a set of inputsOutput
- a set of outputsState
- a set of statesS0 โ S
- an initial stateT : Input * State -> Output * State
- a transition functionIf you model your services (aggregates, projections, process managers, sagas, whatever) as state machines, one issue to address is management of State
. There must be a mechanism to provide State
to the state machine, and to persist resulting State
for subsequent retrieval. One way to address this is by storing State
is a key-value store. Another way is to use a SQL database. Yet another way is event sourcing. The benefit of even sourcing is that you never need to store State
itself. Instead, you rely on the Output
of a service to reconstitute state. In order to do that, the state machine transition function needs to be factored into two functions as follows:
module AsyncTools | |
module Cleaners | |
def self.find_job_for_object_by_method(klass, method) | |
jobs = Sidekiq::ScheduledSet.new | |
jobs.select { |job| |
belongs_to
association does not automatically save the object. It does not save the associated object either.has_one
association, that object is automatically saved (in order to update its foreign key).has_one
association) is unsaved (that is, new_record?
returns true) then the child objects are not saved. They will automatically when the parent object is saved.