CFP - Docs - greaterThan

greaterThan

(right: number) => (left: number) => number

Test whether a number is greater than another

Try It

const gt1 = greaterThan(1)
gt1(1) // is false
gt1(2) // is true
const gt1 = greaterThan(1)
gt1(1) // is false
gt1(2) // is true

Try It

const gt1 = greaterThan(1)
gt1(1) // is false
gt1(2) // is true
const gt1 = greaterThan(1)
gt1(1) // is false
gt1(2) // is true

Sometimes we want to test for thesholds. Below, we want to display boots which have sold over 70 in the last week. Let's find our hot sellers.

Try It

const bootsSoldInLastWeek = {
  columbia: 82,
  timberland: 65,
  nortiv: 58,
  keen: 79,
}

const soldOver70 = greaterThan(70)
const getHotSellers = compose([keepWhen(soldOver70), Object.keys])
const hotSellers = getHotSellers(bootsSoldInLastWeek)
console.log(hotSellers)
// is [
//   columbia,
//   keen,
// ]
type BootSales = Record<string, number>
const bootsSoldInLastWeek = {
  columbia: 82,
  timberland: 65,
  nortiv: 58,
  keen: 79,
}

const soldOver70 = greaterThan(70)
const keepHotSellers = keepWhen(soldOver70)<BootSales>
const getHotSellers = compose([keepHotSellers, Object.keys])
const hotSellers = getHotSellers(bootsSoldInLastWeek)
console.log(hotSellers)
// is [
//   columbia,
//   keen,
// ]

Try It

const bootsSoldInLastWeek = {
  columbia: 82,
  timberland: 65,
  nortiv: 58,
  keen: 79,
}

const soldOver70 = greaterThan(70)
const getHotSellers = compose([
  keepWhen(soldOver70),
  Object.keys,
])
const hotSellers = getHotSellers(
  bootsSoldInLastWeek
)
console.log(hotSellers)
// is [
//   columbia,
//   keen,
// ]
type BootSales = Record<string, number>
const bootsSoldInLastWeek = {
  columbia: 82,
  timberland: 65,
  nortiv: 58,
  keen: 79,
}

const soldOver70 = greaterThan(70)
const keepHotSellers = keepWhen(
  soldOver70
)<BootSales>
const getHotSellers = compose([
  keepHotSellers,
  Object.keys,
])
const hotSellers = getHotSellers(
  bootsSoldInLastWeek
)
console.log(hotSellers)
// is [
//   columbia,
//   keen,
// ]