Ruby - How to retrieve sum in array group by multiple keys with condition max

Question

The original array is

[
    {\"id\"=>2, \"idx\"=>111, \"money\"=>\"4.00\", \"money1\"=>\"1.00\", \"order\"=>\"001\", \"order1\"=>\"1\"},
    {\         


        

Answer 1

I used this code

def aggregate(arr, group_fields, sum_fields, max_fields)
arr.group_by { |x| x.values_at(*group_fields) }.map {|key, hashes|
  result = hashes[0].clone
  max_fields.each { |k|
      hashes.map! {|h| h.merge(h) { |k, v| Integer(v) rescue v }}
      #hashes.map! { |h| h.each_pair { | k, v | h[k] = Integer(v) rescue v }}
      result[k] = hashes.max_by { |h| h[k]}[k]
  }

  sum_fields.each { |k|
    result[k] = hashes.inject(0) { |s, x| s + x[k].to_f }
  }
  result
}end

One thing not good is that to convert all fields to int (convert to int for comparison in case: "id"=>"12" and "id"=>"2"). Should convert max_fields only, but I dont think a solution yet. Code for convert is:

hashes.map! {|h| h.merge(h) { |k, v| Integer(v) rescue v }} Or

hashes.map! { |h| h.each_pair { | k, v | h[k] = Integer(v) rescue v

So, its great if someone could solve this weak point.