Finding the minimum value of a nested object property

Question

I have an object that looks like this:

const yo = {
  one: {
    value: 0,
    mission: 17},
  two: {
    value: 18,
    mission: 3},
  three: {
    value: -2,
    mission: 4},
}

I want to find the minimum value of the mission prop within the nested objects. This line works to find the minimum value of the nested value prop and returns -2 :

const total = Object.values(yo).reduce((t, {value}) => Math.min(t, value), 0)

But when I try the same thing for the mission prop, it returns 0 when it should be 3 :

const total = Object.values(yo).reduce((t, {mission}) => Math.min(t, mission), 0)

Is there something that I am missing or doing wrong?

Answer 1

In this case, map is enough.

 const yo = { one: { value: 9, mission: 17 }, two: { value: 18, mission: 6 }, three: { value: 3, mission: 4 }, } const total = Object.values(yo).map(({ mission }) => mission); console.log(Math.min(...total));

Answer 2

You are passing 0 as the initial value of accumulator ie t . 0 is less than all the mission values. So you need to pass the greatest value ie Infinity as second argument of reduce() .

 const yo = { one: { value: 0, mission: 17}, two: { value: 18, mission: 3}, three: { value: -2, mission: 4}, } const total = Object.values(yo).reduce((t, {mission}) => Math.min(t, mission), Infinity); console.log(total)