ngauthier

// if we have
function do() {
  // thing that takes 100ms - 2s depending on browser
}

// Instead of:
setInterval(do, 500) // pray it doesn't lock the browser


// Do this:

ngauthier

# Merging Scopes
# ==============
# The goal is to join two tables to get all the records where a scope on both
# side of the join is used. I used to do this with a `where()` in which I
# added some sql on the joined table. But, I wanted to use the existing scopes
# from the joining table. Turns out there's a `merge` method on a scope where
# you can merge with another scope without having to chain!

class Car < ActiveRecord::Base
  has_and_belongs_to_many :people