CFP - Docs - getMinValue

getMinValue

(collection: Numbers) => number | undefined

Return the smallest number in the collection

Try It

getMinValue([2, 1, 3]) // is 1
getMinValue([]) // is undefined
getMinValue([2, 1, 3]) // is 1
getMinValue([]) // is undefined

Try It

getMinValue([2, 1, 3]) // is 1
getMinValue([]) // is undefined
getMinValue([2, 1, 3]) // is 1
getMinValue([]) // is undefined

Sometimes we need the smallest number in a collection. Below, Liz is tracking her times for 5-mile bike trips each day. Let's find her fastest time so she knows what to shoot for.

Try It

const trips = [
  { start: 'Jan 5 2025 10:01:32', end: 'Jan 5 2025 10:36:09' },
  { start: 'Jan 6 2025 09:40:58', end: 'Jan 6 2025 10:12:45' },
  { start: 'Jan 7 2025 09:50:01', end: 'Jan 7 2025 10:22:09' },
  { start: 'Jan 8 2025 09:45:32', end: 'Jan 8 2025 10:17:28' },
]

const toDurationMs = ({ start, end }) => new Date(end) - new Date(start)
const toTripTime = durationMs => {
  const duration = new Date(durationMs)
  const minutes = duration.getMinutes()
  const seconds = duration.getSeconds()
  return `${minutes}m ${seconds}s`
}
const getTripDurations = mapValues(toDurationMs)
const getFastestTripTime = compose([getTripDurations, getMinValue, toTripTime])

const time = getFastestTripTime(trips)
console.log(time) // is 31m 47s
type Trip = {
  start: string
  end: string
}

const trips: Trip[] = [
  { start: 'Jan 5 2025 10:01:32', end: 'Jan 5 2025 10:36:09' },
  { start: 'Jan 6 2025 09:40:58', end: 'Jan 6 2025 10:12:45' },
  { start: 'Jan 7 2025 09:50:01', end: 'Jan 7 2025 10:22:09' },
  { start: 'Jan 8 2025 09:45:32', end: 'Jan 8 2025 10:17:28' },
]

const toDurationMs = ({ start, end }: Trip) => {
  const endMs = new Date(end).getTime()
  const startMs = new Date(start).getTime()
  return endMs - startMs
}
const toTripTime = (durationMs: number) => {
  const duration = new Date(durationMs)
  const minutes = duration.getMinutes()
  const seconds = duration.getSeconds()
  return `${minutes}m ${seconds}s`
}
const getTripDurations = mapValues(toDurationMs)<Trip[]>
const getFastestTripTime = compose([getTripDurations, getMinValue, toTripTime])

const time = getFastestTripTime(trips)
console.log(time) // is 31m 47s

Try It

const trips = [
  {
    start: 'Jan 5 2025 10:01:32',
    end: 'Jan 5 2025 10:36:09',
  },
  {
    start: 'Jan 6 2025 09:40:58',
    end: 'Jan 6 2025 10:12:45',
  },
  {
    start: 'Jan 7 2025 09:50:01',
    end: 'Jan 7 2025 10:22:09',
  },
  {
    start: 'Jan 8 2025 09:45:32',
    end: 'Jan 8 2025 10:17:28',
  },
]

const toDurationMs = ({ start, end }) =>
  new Date(end) - new Date(start)
const toTripTime = durationMs => {
  const duration = new Date(durationMs)
  const minutes = duration.getMinutes()
  const seconds = duration.getSeconds()
  return `${minutes}m ${seconds}s`
}
const getTripDurations = mapValues(toDurationMs)
const getFastestTripTime = compose([
  getTripDurations,
  getMinValue,
  toTripTime,
])

const time = getFastestTripTime(trips)
console.log(time) // is 31m 47s
type Trip = {
  start: string
  end: string
}

const trips: Trip[] = [
  {
    start: 'Jan 5 2025 10:01:32',
    end: 'Jan 5 2025 10:36:09',
  },
  {
    start: 'Jan 6 2025 09:40:58',
    end: 'Jan 6 2025 10:12:45',
  },
  {
    start: 'Jan 7 2025 09:50:01',
    end: 'Jan 7 2025 10:22:09',
  },
  {
    start: 'Jan 8 2025 09:45:32',
    end: 'Jan 8 2025 10:17:28',
  },
]

const toDurationMs = ({ start, end }: Trip) => {
  const endMs = new Date(end).getTime()
  const startMs = new Date(start).getTime()
  return endMs - startMs
}
const toTripTime = (durationMs: number) => {
  const duration = new Date(durationMs)
  const minutes = duration.getMinutes()
  const seconds = duration.getSeconds()
  return `${minutes}m ${seconds}s`
}
const getTripDurations = mapValues(toDurationMs)<
  Trip[]
>
const getFastestTripTime = compose([
  getTripDurations,
  getMinValue,
  toTripTime,
])

const time = getFastestTripTime(trips)
console.log(time) // is 31m 47s