LucaColonnello

const propSelector = (prop, ctx) => (typeof prop === 'function' ? prop(ctx) : (prop ?? ''));
const tinyTpl = (parts, ...props) =>
  (ctx) => parts.map((v, i) => v.concat(propSelector(props[i], ctx))).join('');


const get = (prop) => (ctx) => ctx[prop];

const template = tinyTpl`hello ${get('name')} ${'yay'}!`
console.log(template({ name: 'Luca' }))

LucaColonnello

// https://jsbin.com/fumuwiqegu/edit?js,console

/*
Create a memo higher order function that works with any number and type of params.

This solution uses hashmaps to achieve fast performance.

  cache = Map {
    [[ValueSymbol]] => value,
    arg1 => Map {