Mastering JavaScript Functional Programming - Second Edition

Chaining method calls

Let's go for a basic example. We could have a City class with name, latitude (lat), and longitude (long) attributes:

class City {  constructor(name, lat, long) {    this.name = name;    this.lat = lat;    this.long = long;  }  getName() {    return this.name;  }  setName(newName) {    this.name = newName;  }  setLat(newLat) {    this.lat = newLat;  }  setLong(newLong) {    this.long = newLong;  }  getCoords() {    return [this.lat, this.long];  }}

This is a common class with a few methods; everything's quite normal. We could use this class as follows and provide details about my native city, Montevideo, Uruguay:

let myCity = new City("Montevideo, Uruguay", -34.9011, -56.1645);console.log(myCity.getCoords(), myCity.getName());// [ -34.9011, -56.1645 ] ...