min.md

minBy

Used to get the element containing the lowest property value in an Array

Syntax:
minBy(valueSelectorFn)
Usage in a reducer:
array.reduce(minBy(valueSelectorFn))

Arguments:

• valueSelectorFn is a used to extract the value to compare from the object in the array.
  valueSelectorFn is of the form (obj) => any

minOf

Used to get the lowest value of a property in an array.

Syntax:
minOf(valueSelectorFn)
Usage in a reducer:
array.reduce(minOf(valueSelectorFn))

Arguments:

• valueSelectorFn is a used to extract the value to compare from the object in the array.
  valueSelectorFn is of the form (obj) => any

min

Used to get the lowest value in an array. This can only be used with arrays of simple types like an array of strings or numbers

Syntax:
min()
Usage in a reducer:
array.reduce(min())

Arguments:
None

Examples

Usage:

const testData = [
    { name: 'Oslo', population: 709000 },
    { name: 'Stockholm', population: 985000 },
    { name: 'Copenhagen', population: 657000 }
]

testData.reduce(minBy(x => x.population), null) // returns { name: 'Compenhagen', population: 657000 }
testData.reduce(minOf(x => x.population), null) // returns 657000
testData.reduce(min(), null) // fails, since it is not a array of simple types

const testData = [ 10, 30, 20]

testData.reduce(min(), null) // returns 10

Remarks:

See also:

• max
• unit tests for minBy, minOf and min