b = {:a => 'option1', :b => 'option2' }
b.to_query

...

# MODEL
class Rayon < ActiveRecord::Base
  has_many :users
...

# Ruby 1.8.6
pools = {1 => [1,2,3], 2 => [3,4,5], 3 => [5,6,7]}
values = pools.values.flatten
...

Ruby On Find the Intersection of Ar...

by Jeremy Weiskotten, July 31, 2008 21:59

Here are a couple of option...

class User
  named_scope :older_than, lambda { |u| { :conditions => ['age > u', u.age] } }
end
...

Ruby On How to make instance variab...

by Jeremy Weiskotten, July 31, 2008 14:21

If you're using Rails 2.1, ...

event_times = events.collect { |event| event.datetime.strftime("%I:%M %p") }
times = times.reject { |time| event_times.include?(time.strftime("%I:%M %p'")) }

Ruby On two for loops cleanup?

by Jeremy Weiskotten, July 31, 2008 04:31

I posted this refactoring e...

module Enumerable
  def cluster
    self.uniq.sort.map { |u| self.select { |v| u == v } }
...

def all_shops(products)
  products.map(&:shops).flatten.uniq
end

Ruby On Squash a collection.

by Jeremy Weiskotten, July 07, 2008 13:47

Daniel nailed it. If you're...

def valid_param?(key)
  params[key] && params[key].length > 3
end
...

{
  "0" => "24142",
  "1" => "15151",
...