Iterate over an array of objects

Question

I have got an array of objects in object and trying to reduce to specific form of array. For example:

[
  #<Item name: "Item 1", content: #<Item value: #<Item quantity: val1>, #<Item 
quality: val2>>,
  #<Item name: "Item 2", content: #<Item value: #<Item quantity: val1>, #<Item 
quality: val2>>,
  #<Item name: "Item 3", content: #<Item value: #<Item quantity: val1>, #<Item 
quality: val2>>,
  #<Item name: "Item 4", content: #<Item value: #<Item quantity: val1>, #<Item 
quality: val2>>,
  #<Item name: "Item 5", content: #<Item value: #<Item quantity: val1>, #<Item 
quality: val2>>
]

should be reduce to

[ [Item1, [val1, val2]], [Item2, [val1, val2]], [Item3, [val1, val2]], [Item4, 
[val1, val2]], [Item5, [val1, val2]]]

I have tried

arr1 = []
arr2 = []
array.each do |array|
 arr1 << array.name
  arr2 << array.value.quantity
   arr2 << array.value.quality
   arr1 << arr2
 end

The output of the above code is

[ Item1,  [val1,val2,val1,val2,val1,val2,val1,val2,val1,val2,val1,val2], 
Item2, [[val1,val2,val1,val2,val1,val2,val1,val2,val1,val2,val1,val2]....]

The problem with this code it does not stop iterate per object what i mean is for Item1 it should be only val1 and val2 only for Item1.

is the Items object a result of database query? i ask this, if you wanna get an array, this should be done with `pluck` — marmeladze, Apr 22 '17 at 10:32

score 5 · Answer 1 · answered Apr 22 '17 at 09:55

5

I would start with something like this:

array.map do |element|
  [element.name, [element.value.quantity, element.value.quality]]
end

answered Apr 22 '17 at 09:55

spickermann

100,941
9
101
131

Iterate over an array of objects

1 Answers1