Mastering JavaScript Functional Programming - Second Edition

Questions

1.1. Classes as first-class objects: We learned that functions are first-class objects, but did you know that classes also are? (Though, of course, speaking of classes as objects does sound weird.) Look at the following example and see what makes it tick! Be careful: there's some purposefully weird code in it:

const makeSaluteClass = term => class {    constructor(x) {      this.x = x;    }    salute(y) {      console.log(`${this.x} says "${term}" to ${y}`);    }  };const Spanish = makeSaluteClass("HOLA");new Spanish("ALFA").salute("BETA");// ALFA says "HOLA" to BETAnew (makeSaluteClass("HELLO"))("GAMMA").salute("DELTA");// GAMMA says "HELLO" to DELTAconst fullSalute = (c, x, y) => new c(x).salute(y);const French = makeSaluteClass("BON JOUR");fullSalute(French, ...