CFP - Docs - pAny

pAny

(predicate: AsyncPredicate) => async (collection: Collection) => boolean

One at a time, asynchronously test if any entry passes a condition

Try It

const gt2 = async n => n > 2
const anyGt2 = pAny(gt2)

await anyGt2([1, 2]) // is false
await anyGt2([1, 2, 3]) // is true
await anyGt2({ a: 1, b: 2 }) // is false
await anyGt2({ a: 1, b: 2, c: 3 }) // is true
const gt2 = async (n: number) => n > 2
const anyGt2 = pAny(gt2)

await anyGt2([1, 2]) // is false
await anyGt2([1, 2, 3]) // is true
await anyGt2({ a: 1, b: 2 }) // is false
await anyGt2({ a: 1, b: 2, c: 3 }) // is true

Try It

const gt2 = async n => n > 2
const anyGt2 = pAny(gt2)

await anyGt2([1, 2]) // is false
await anyGt2([1, 2, 3]) // is true
await anyGt2({ a: 1, b: 2 }) // is false
await anyGt2({ a: 1, b: 2, c: 3 }) // is true
const gt2 = async (n: number) => n > 2
const anyGt2 = pAny(gt2)

await anyGt2([1, 2]) // is false
await anyGt2([1, 2, 3]) // is true
await anyGt2({ a: 1, b: 2 }) // is false
await anyGt2({ a: 1, b: 2, c: 3 }) // is true

Sometimes we want to asynchronously test if any entry passes a condition. Below, we call a mock store API to see if any item in our shopping cart belongs to a bundle deal. If so, we should try to upsell the shopper.

Try It

const mockStoreApi = {
  hasBundleDeal: async item => item === 'detergent',
}

const shoppingCart = ['broom', 'mop', 'detergent']
const anyItemHasDeal = pAny(mockStoreApi.hasBundleDeal)
const shouldShowDeal = await anyItemHasDeal(shoppingCart)

console.log('shouldShowDeal: ' + shouldShowDeal)
// is true
const mockStoreApi = {
  hasBundleDeal: async (item: string) => item === 'detergent',
}

const shoppingCart = ['broom', 'mop', 'detergent']
const anyItemHasDeal = pAny(mockStoreApi.hasBundleDeal)<string[]>

const shouldShowDeal = await anyItemHasDeal(shoppingCart)

console.log('shouldShowDeal: ' + shouldShowDeal)
// is true

Try It

const mockStoreApi = {
  hasBundleDeal: async item =>
    item === 'detergent',
}

const shoppingCart = ['broom', 'mop', 'detergent']
const anyItemHasDeal = pAny(
  mockStoreApi.hasBundleDeal
)
const shouldShowDeal =
  await anyItemHasDeal(shoppingCart)

console.log('shouldShowDeal: ' + shouldShowDeal)
// is true
const mockStoreApi = {
  hasBundleDeal: async (item: string) =>
    item === 'detergent',
}

const shoppingCart = ['broom', 'mop', 'detergent']
const anyItemHasDeal = pAny(
  mockStoreApi.hasBundleDeal
)<string[]>

const shouldShowDeal =
  await anyItemHasDeal(shoppingCart)

console.log('shouldShowDeal: ' + shouldShowDeal)
// is true

pAny awaits each item before moving onto the next. See async.someLimit if you want to run more than one call at a time.

Try It

const start = new Date().getTime()

const gt2 = async n => {
  const msPassed = Date.now() - start
  console.log(`ms passed: ${msPassed}, for n = ${n}`)

  await pWaitMs(20)
  return n > 2
}
const anyGt2 = pAny(gt2)

await anyGt2([2, 3, 4])
const totalMsPassed = Date.now() - start
console.log(`total ms passed: ${totalMsPassed}`)
const start = new Date().getTime()

const gt2 = async (n: number) => {
  const msPassed = Date.now() - start
  console.log(`ms passed: ${msPassed}, for n = ${n}`)

  await pWaitMs(20)
  return n > 2
}
const anyGt2 = pAny(gt2)<number[]>

await anyGt2([2, 3, 4])
const totalMsPassed = Date.now() - start
console.log(`total ms passed: ${totalMsPassed}`)

Try It

const start = new Date().getTime()

const gt2 = async n => {
  const msPassed = Date.now() - start
  console.log(
    `ms passed: ${msPassed}, for n = ${n}`
  )

  await pWaitMs(20)
  return n > 2
}
const anyGt2 = pAny(gt2)

await anyGt2([2, 3, 4])
const totalMsPassed = Date.now() - start
console.log(`total ms passed: ${totalMsPassed}`)
const start = new Date().getTime()

const gt2 = async (n: number) => {
  const msPassed = Date.now() - start
  console.log(
    `ms passed: ${msPassed}, for n = ${n}`
  )

  await pWaitMs(20)
  return n > 2
}
const anyGt2 = pAny(gt2)<number[]>

await anyGt2([2, 3, 4])
const totalMsPassed = Date.now() - start
console.log(`total ms passed: ${totalMsPassed}`)