CODEWITHSUNDEEP
ruby-on-railsruby
Jerome
Jerome

Reputation: 6217

Manipulating a session array of hashes

The following session data has an array of hashes that is dynamically named

session["a_#{@aisle.id}"] = [{"id"=>"26", "name"=>"skis", "sale_price"=>"449.99"}, {:id=>"17", :name=>"Boots", :sale_price=>"146.42"}]

To display these, in a view, session["a_#{@aisle.id}"].each can call each member of the collection, however how should these members be invoked?

session["a_#{@aisle.id}"].each do |hash|
  hash.sale_price
end

will return (undefined method 'sale_price' for #<Hash:0x00007feb9b090338>).

Subsequently, how should the sum of sale_price key be called?

Upvotes: 0

Views: 46

Answers (1)

max pleaner
max pleaner

Reputation: 26788

Seems like you just need to use the [key] hash accessor. You can find the sum like so:

sum = session["a_#{@aisle.id}"].sum do |hash|
  hash["sale_price"]
end

or alterntively you could do this with map + sum:

prices = session["a_#{@aisle.id}"].map do |hash|
  hash["sale_price"]
end
sum = prices.sum

Upvotes: 1

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