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require 'csv' | |
require 'YAML' | |
Customer = Struct.new(:cust_id, | |
:elect_or_gas, | |
:disconnect_doc, | |
:move_in_date, | |
:move_out_date, | |
:bill_year, | |
:bill_month, | |
:span_days, | |
:meter_read_date, | |
:meter_read_type, | |
:consumption, | |
:exception_code, | |
:data | |
) | |
class Parser | |
attr_accessor :customers | |
def initialize filename | |
self.customers = [] | |
deserialize_users filename | |
serialize_users | |
end | |
def deserialize_users filename | |
CSV.foreach(filename, col_sep: "|") do |row| | |
next if row.empty? | |
#sanitized_values(cust_id, elect_or_gas, disconnect_doc, move_in_date, move_out_date, bill_year, bill_month, span_days, meter_read_date, meter_read_type, consumption, exception_code = row) | |
customers << Customer.new(*row, row) | |
end | |
customers | |
end | |
def serialize_users | |
CSV.open("./serialized_users.txt", "w") do |csv| #is 'a' better? | |
customers.each do |c| | |
csv << [c.data] #why an array of hashes is better? and how? | |
end | |
end | |
end | |
end | |
class Reporting | |
attr_accessor :p | |
def initialize data | |
self.p = Parser.new data | |
end | |
#STATISTICS | |
def unique_customers | |
p.customers.uniq {|customer| customer.cust_id } | |
end | |
def customers_with_electricity | |
p.customers.select { |customer| customer.elect_or_gas == "1" && customer.elect_or_gas != "2" } | |
end | |
def customers_with_gas | |
p.customers.select { |customer| customer.elect_or_gas != "1" && customer.elect_or_gas == "2" } | |
end | |
#REPORT | |
def show_all_data | |
print "\n\nALL CUSTOMERS AND DATA\n\n" | |
puts p.customers.map { |customer| customer.data.map { |item| item.to_s.center 15 }.join '|' } | |
end | |
def show_unique_customers | |
print "\n\nUNIQUE CUSTOMERS\n\n" | |
unique_customers.map {|customer| puts customer.data.map { |item| item.to_s.center 15}.join'|' } | |
puts "\nNumber of unique customers: #{unique_customers.count -1}" | |
end | |
def show_customers_with_electricity | |
print "\n\nCUSTOMERS WITH ELECTRICITY ONLY\n\n" | |
customers_with_electricity.map {|customer| puts customer.data.map { |item| item.to_s.center 15}.join'|'} | |
puts "\nNumber of customers with electricity: #{customers_with_electricity.count}" | |
end | |
def show_customers_with_gas | |
print "\n\nCUSTOMER WITH GAS ONLY\n\n" | |
customers_with_gas.map {|customer| puts customer.data.map { |item| item.to_s.center 15}.join'|'} | |
puts "\nNumber of customers with gas: #{customers_with_gas.count}" | |
end | |
end | |
r = Reporting.new "./pulse_data.txt" | |
r.show_all_data | |
r.show_unique_customers | |
r.show_customers_with_gas | |
r.show_customers_with_electricity | |
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14:52 r0bgleeson: X = Struct.new(:foo, :bar); X.new(*["1", "2"]).to_a
14:52 r0bgleeson: (pry):7: warning: already initialized constant X
14:52 r0bgleeson: => ["1", "2"]
nice trick