Processing nested arrays

Question

Given the following code (where I display some statistics about a number of bookings):

statistics = [["Germany", "EUR"], 23], [["Germany", "USD"], 42], [["Spain", "EUR"], 17]

statistics.each do |country_and_currency, number_of_bookings|
  country, currency = country_and_currency # <-- Ugly.

  puts "There are #{number_of_bookings} in #{currency} in #{country}"
end

The country_and_currency part is quite ugly. I tried ... do |*(country, currency), number_of_bookings|, but this did not work.

Is there an elegant way to process this nested array without using the country_and_currency variable?

iblue · Accepted Answer · 2014-03-25 17:50:33Z

5

Yes, it's possible:

statistics = [
               [["Germany", "EUR"], 23], 
               [["Germany", "USD"], 42], 
               [["Spain", "EUR"], 17]
             ]

statistics.each do |(country, currency), number_of_bookings|
  puts "There are #{number_of_bookings} in #{currency} in #{country}"
end

Output

There are 23 in EUR in Germany
There are 42 in USD in Germany
There are 17 in EUR in Spain

edited Mar 25, 2014 at 17:50

iblue

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answered Mar 25, 2014 at 12:52

Arup Rakshit

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Comments

sawa · Accepted Answer · 2014-03-25 12:53:35Z

2

statistics.each do |(country, currency), number_of_bookings|
  puts "There are #{number_of_bookings} in #{currency} in #{country}"
end

answered Mar 25, 2014 at 12:53

sawa

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Processing nested arrays

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