2011/07/04 に行われた株式会社スケールアウトさんとのLT大会で使用したスライドです

11. class User < ActiveRecord::Base
attr_accessor :name, :age
has_many :accounts
end

13. ( ω ´)

17. _cond = []
File.open('data.csv'){|f|
f.each_line do |line|
line.chomp!
id, name, age = line.split(/,/)
_cond << %Q!("#{name}", #{age})!
if _cond.size > 1000
# execute insert
end
end
}

18. parse 'data.csv' do |id, name, age|
format [name, age]
end

20. def parse(filepath, separater=',')
if block_given?
File.open(filepath){|f|
f.each_line do |line|
line.chomp!
yield line.split(/#{separater}/)
end
}
else
raise "no block"
end
finalize
end

21. self.included
class_eval
instance_variable_set
define_method