Extracting Composition

extracting_composition.js

// Pointfree utility for "chain"
const chain = fn => a => a.chain(fn);

// generic composition operation
const op = (f1, f2) => compose(chain(f2), f1)

// just to demonstrate, here's the non-generic way of composing our two functions
const op2 = compose(chain(g), f);

// Now we can compose our functions!
const f_g = op(f, g);

// Let's get the result!
const result = f_g('a');

// Identity(a12)
inspect(result);