CFP - Docs - getAverageValue

getAverageValue

(collection: Numbers[]) => number | undefined

Return the average

Returns undefined for empty collections.

Try It

getAverageValue([1, 2, 3, 4]) // is 2.5
getAverageValue([]) // is undefined
getAverageValue([1, 2, 3, 4]) // is 2.5
getAverageValue([]) // is undefined

Try It

getAverageValue([1, 2, 3, 4]) // is 2.5
getAverageValue([]) // is undefined
getAverageValue([1, 2, 3, 4]) // is 2.5
getAverageValue([]) // is undefined

Sometimes we need the average. Below, we have some test scores. The class earns a pizza party if they average a B. Let's find the average.

Try It

const scores = {
  jen: 72,
  mike: 88,
  luke: 93,
}
const getRoundedAvg = compose([getAverageValue, roundToNearest('0.1')])
const roundedAvg = getRoundedAvg(scores)
console.log(roundedAvg) // is 84.3
type Scores = Record<string, number>
const scores: Scores = {
  jen: 72,
  mike: 88,
  luke: 93,
}
const getRoundedAvg = compose([getAverageValue<Scores>, roundToNearest('0.1')])
const roundedAvg = getRoundedAvg(scores)
console.log(roundedAvg) // is 84.3

Try It

const scores = {
  jen: 72,
  mike: 88,
  luke: 93,
}
const getRoundedAvg = compose([
  getAverageValue,
  roundToNearest('0.1'),
])
const roundedAvg = getRoundedAvg(scores)
console.log(roundedAvg) // is 84.3
type Scores = Record<string, number>
const scores: Scores = {
  jen: 72,
  mike: 88,
  luke: 93,
}
const getRoundedAvg = compose([
  getAverageValue<Scores>,
  roundToNearest('0.1'),
])
const roundedAvg = getRoundedAvg(scores)
console.log(roundedAvg) // is 84.3