CFP - Docs - randomlyKeep

randomlyKeep

(num: number) => (collection: Collection) => Collection

Randomly pick num entries.

Try It

const pick2 = randomlyKeep(2)

pick2(['a', 'b', 'c', 'd']) // is 2 random elements
pick2(['a']) // is ['a']
const pick2 = randomlyKeep(2)

pick2(['a', 'b', 'c', 'd']) // is 2 random elements
pick2(['a']) // is ['a']

Try It

const pick2 = randomlyKeep(2)

pick2(['a', 'b', 'c', 'd']) // is 2 random elements
pick2(['a']) // is ['a']
const pick2 = randomlyKeep(2)

pick2(['a', 'b', 'c', 'd']) // is 2 random elements
pick2(['a']) // is ['a']

Sometimes we want to randomly pick items. Below, we have a classroom with a dirty chalkboard. Every day the teacher randomly picks two students to clean it. Let's pick them.

Try It

const students = ['tom', 'ken', 'chris', 'liz']

const pick2 = randomlyKeep(2)
const chalkboardCleaners = pick2(students)
console.log(chalkboardCleaners)
// is two random students
const students = ['tom', 'ken', 'chris', 'liz']

const pick2 = randomlyKeep(2)<string[]>
const chalkboardCleaners = pick2(students)
console.log(chalkboardCleaners)
// is two random students

Try It

const students = ['tom', 'ken', 'chris', 'liz']

const pick2 = randomlyKeep(2)
const chalkboardCleaners = pick2(students)
console.log(chalkboardCleaners)
// is two random students
const students = ['tom', 'ken', 'chris', 'liz']

const pick2 = randomlyKeep(2)<string[]>
const chalkboardCleaners = pick2(students)
console.log(chalkboardCleaners)
// is two random students