Is there any way to make a function's return accessible via a property?

Question

I\'m a JS dev, experimenting with functional programming ideas, and I\'m wondering if there\'s anyway to use chains for synchronous functions in the way the promise chains are w

Answer 1

You might be interested in the Identity functor – it allows you to lift any function to operate on the Identity's value – eg, square and mult below. You get a chainable interface without having to touch native prototypes ^_^

const Identity = x => ({
  runIdentity: x,
  map: f => Identity(f(x))
})

const square = x => x * x

const mult = x => y => x * y

let result = Identity(2)
  .map(square)
  .map(square)
  .map(square)
  .map(mult(1000))
  .runIdentity
  
console.log(result)
// 256000