CFP - Docs - endsWith

endsWith

(suffix: string) => (aString: string) => boolean

Test if one string ends with another

Try It

const endsWithCD = endsWith('cd')

endsWithCD('abcd') // is true
endsWithCD('cdab') // is false
const endsWithCD = endsWith('cd')

endsWithCD('abcd') // is true
endsWithCD('cdab') // is false

Try It

const endsWithCD = endsWith('cd')

endsWithCD('abcd') // is true
endsWithCD('cdab') // is false
const endsWithCD = endsWith('cd')

endsWithCD('abcd') // is true
endsWithCD('cdab') // is false

Sometimes we want to see if a string ends with another. Below, someone turned in a lost notebook with only the last name printed, 'Davis.' Let's find which classes have a Davis.

Try It

const classrooms = {
  A: ['phil smith', 'mary garcia', 'sarah miller'],
  B: ['matt davis', 'jason taylor', 'amy moore'],
  C: ['kim white', 'grace walker', 'sam davis'],
}

const endsWithDavis = endsWith(' davis')
const roomHasDavis = any(endsWithDavis)
const getRoomsWithDavis = compose([keepWhen(roomHasDavis), Object.keys])

const roomsToCheck = getRoomsWithDavis(classrooms)
console.log(roomsToCheck) // is [B, C]
type Classrooms = Record<string, string[]>
const classrooms: Classrooms = {
  A: ['phil smith', 'mary garcia', 'sarah miller'],
  B: ['matt davis', 'jason taylor', 'amy moore'],
  C: ['kim white', 'grace walker', 'sam davis'],
}

const endsWithDavis = endsWith(' davis')
const roomHasDavis = any(endsWithDavis)<string[]>
const getRoomsWithDavis = compose([
  keepWhen(roomHasDavis)<Classrooms>,
  Object.keys,
])

const roomsToCheck = getRoomsWithDavis(classrooms)
console.log(roomsToCheck) // is [B, C]

Try It

const classrooms = {
  A: [
    'phil smith',
    'mary garcia',
    'sarah miller',
  ],
  B: ['matt davis', 'jason taylor', 'amy moore'],
  C: ['kim white', 'grace walker', 'sam davis'],
}

const endsWithDavis = endsWith(' davis')
const roomHasDavis = any(endsWithDavis)
const getRoomsWithDavis = compose([
  keepWhen(roomHasDavis),
  Object.keys,
])

const roomsToCheck = getRoomsWithDavis(classrooms)
console.log(roomsToCheck) // is [B, C]
type Classrooms = Record<string, string[]>
const classrooms: Classrooms = {
  A: [
    'phil smith',
    'mary garcia',
    'sarah miller',
  ],
  B: ['matt davis', 'jason taylor', 'amy moore'],
  C: ['kim white', 'grace walker', 'sam davis'],
}

const endsWithDavis = endsWith(' davis')
const roomHasDavis = any(endsWithDavis)<string[]>
const getRoomsWithDavis = compose([
  keepWhen(roomHasDavis)<Classrooms>,
  Object.keys,
])

const roomsToCheck = getRoomsWithDavis(classrooms)
console.log(roomsToCheck) // is [B, C]