Determine role ratios from predetermined configurations

[sudojunior]

Assuming roleConfigs is an array of role configurations that scale with the player quantity that is used to determine the average ratio of roles per game.

roleConfigs.map(({ roles, playerCount }) => {
  return roles.map(({ role, count }) => ({
    role, ratio: count / playerCount
  }))
}).reduce((prev, next) => {
  return next.map(({ role, ratio }, index) => {
    return { role, ratio: (prev[index]?.ratio || 0) + ratio }
  });
}, []).map(({ role, ratio }, index, array) => ({ role, ratio: ratio / array.length }));

The following assumes that the sum of count found in each role is equal to that of playerCount for that particular configuration - which is then used to determine the ratio of roles for that game, and then again with the output of that result to determine an average.

[sudojunior]

Equivalent to the notation of sum(configs.*.roles[index].count) / len(roles) - with index referring to the current loop (also implying that each role is in the exact order that the first config is found in (even if one such role does not exist in a specific configuration).

But as for steering the boat back on course, this is merely for debugging purposes.