JamesDullaghan

#Arrays# ###Using the Docs###

[1,2,3,4].each {|x| puts x + 1 }
2
3
4
5
=> [1,2,3,4]

JamesDullaghan

#Mixing and Matching Queries#

puts Product.where(:price => 5).
             where(:name => "apple").
             order(:created_at).
             limit(55).
             joins(:users).
             where(:user => {:name => "richard"})

##Each method takes the output of the previous and adds to it##

JamesDullaghan

#Grouping#

prods = Product.group(:price).count

Returns

puts prods
=> {573=>3, 574=>4, 575=>6, 576=>4}

The group method returns a hash of all prices, along with the count of each price. For example, there must be 3 items priced at 573