Question

I am trying to define a structure that can create a one-to-many relationship, sort of. For example, let’s say an organization named “ACO” has some stuff:

KEY_PERF_INDS = [ {'ACO' => [2,3,4] , [2,34,5]} ]

But this is syntactically wrong. Is it possible to write something that achieves this?

Answer 1

If your other groups HOSPITAL, BLAH, ETC (per the comments) are all to be at the same level as ACO, then the entire structure KEY_PERF_INDS should be a hash {} rather than an array []. Make each of those a key to the main hash, and each is an array containing sub-arrays.

# The main structure is a hash {}
KEY_PERF_INDS = { 
  'ACO' => [
    [1,2,3],
    [4,5,6]
  ], 
   'HOSPITAL' => [
    [3,2,1],
    [9,8,7]
  ],
  'BLAH' => [
    [99,88], 
    [11,22],
    [33,44]
  ]
}

Access these then as:

KEY_PERF_INDS['HOSPITAL'][1][2]
# prints 7

KEY_PERF_INDS['BLAH'].last.first
# prints 33