#27 - Javascript

Author: parababire

Roadmap/27 - SOLID OCP/javascript/parababire.js

@@ -0,0 +1,133 @@
+// Ejercicio
+
+/* Incorrecto */
+
+class Animal {
+  constructor(sound) {
+    this.sound = sound
+  }
+
+  makeSound () {
+    switch (this.sound) {
+      case 'meau':
+        console.log(`The animal makes meau!!!`);
+        break;
+      case 'woof':
+        console.log(`The animal makes woof!!!`);
+        break;
+      default:
+        console.log('Please incert an animal sound!');
+        break;
+    }
+  }
+}
+const animal = new Animal('meau')
+animal.makeSound()
+
+/* Correcto */
+
+class Person {
+  constructor(name, occupation) {
+    this.name = name
+    this.occupation = occupation
+  }
+
+  getOccupation() {
+    return this.occupation.getOccupation()
+  }
+}
+
+class PersonOccupation {
+  getOccupation() {}
+}
+
+class IndustrialEngineer extends PersonOccupation {
+  getOccupation() {
+    return 'I am an industrial engineer.'
+  }
+}
+
+const engineer = new Person('Yojan', new IndustrialEngineer())
+console.log(`Hola mi nombre es ${engineer.name} soy ${engineer.getOccupation()}`)
+
+// Extra
+
+class Operation {
+  constructor() {
+    if (new.target === Operation) {
+      throw new TypeError("No puedes instanciar la clase abstracta 'Operation' directamente")
+    }
+  }
+  execute() {
+    throw new Error("Método 'execute()' debe ser implementado en la clase hija")
+  }
+}
+
+class Addition extends Operation{
+  constructor(a, b) {
+    super()
+    this.a = a
+    this.b = b
+  }
+  execute() {
+    return this.a + this.b
+  }
+}
+
+class Subtract extends Operation{
+  constructor(a, b) {
+    super()
+    this.a = a
+    this.b = b
+  }
+  execute() {
+    return this.a - this.b
+  }
+}
+
+class Multiply extends Operation{
+  constructor(a, b) {
+    super()
+    this.a = a
+    this.b = b
+  }
+  execute() {
+    return this.a * this.b
+  }
+}
+
+class Divide extends Operation{
+  constructor(a, b) {
+    super()
+    this.a = a
+    this.b = b
+  }
+  execute() {
+    return this.a / this.b
+  }
+}
+
+class Calculator {
+  constructor() {
+    this.operations = {}
+  }
+  addOperation(name, operation) {
+    this.operations[name] = operation
+  }
+
+  calculate(name) {
+    if (!this.operations[name]) {
+      throw new Error(`Operación ${name} no es valida`)
+    }
+    return this.operations[name].execute()
+  }
+}
+
+const calculadora = new Calculator()
+calculadora.addOperation('addition', new Addition(10, 2))
+calculadora.addOperation('subtraction', new Subtract(5, 2))
+calculadora.addOperation('multiplication', new Multiply(9, 2))
+
+console.log(calculadora.calculate('subtraction'))
+console.log(calculadora.calculate('addition'))
+console.log(calculadora.calculate('multiplication'))