CODEWITHSUNDEEP
ruby-on-railsruby
uno
uno

Reputation: 1481

Output sum of decimal/float array rails

I have the following which i thought would get me the sum of the array but doesnt:

<% @orders.each do |order| %>
   <% if Product.exists?(sku: order.line_items.where().map {|li| li.sku }) %>
      <%= order.line_items.where(vendor_name: @vendor.vendor_name).map do |li| %>
          <% if Product.exists?(sku: li.sku) %>
              <% product = Product.find_by(sku: li.sku ) %>
              <% ((li.store_price.to_d * li.store_fulfillable_quantity) - (product.production_price * li.store_fulfillable_quantity)) * (0.70) %>
          <% end %>
       <% end.compact.sum %>
   <% end %>
<% end %>

The output is something like:

25.21 25.21 12.66 5.33 12.66 9.01

I need to add these numbers. How can I do this with the decimals/floats?

When I use 

<%= @orders.each do |order| %>

I get undefined method + for nilclass for the line that is on, and it's not nil but obviously I'm missing some factor on how sum works.

Upvotes: 0

Views: 267

Answers (2)

Moeen
Moeen

Reputation: 412

method reduce in arrays designed for getting reduced value of collection:

array.compact.reduce(:+)
# => Sum of array

more info about reduce

Upvotes: 0

uno
uno

Reputation: 1481

<%= @orders.map do |order| %>
   <% if Product.exists?(sku: order.line_items.where().map {|li| li.sku }) %>
      <% order.line_items.where(vendor_name: @vendor.vendor_name).map do |li| %>
          <% if Product.exists?(sku: li.sku) %>
              <% product = Product.find_by(sku: li.sku ) %>
              <% ((li.store_price.to_d * li.store_fulfillable_quantity) - (product.production_price * li.store_fulfillable_quantity)) * (0.70) %>
          <% end %>
       <% end.compact.sum %>
   <% end %>
<% end.compact.sum %>

Is how i got it to work

Upvotes: 1

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