Function Composition Lift

function-composition-lift.ts

// Taken from https://dev.to/gcanti/getting-started-with-fp-ts-functor-36ek

// Here we lift a pure function to work with Array
function lift<B, C>(g: (b: B) => C): (fb: Array<B>) => Array<C> {
  return fb => fb.map(g)
}
 
import { Option, isNone, none, some } from 'fp-ts/lib/Option'
// Here we lift a pure function to work with Option
function lift<B, C>(g: (b: B) => C): (fb: Option<B>) => Option<C> {
  return fb => (isNone(fb) ? none : some(g(fb.value))) // we just unwrap the value inside the Option and apply it to our pure function g()
}