#07 - TypeScript

Roadmap/07 - PILAS Y COLAS/typescript/FrancoKaddour.ts

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+// https://www.typescriptlang.org/
+
+// Pila (LIFO) con array
+const stack: number[] = [];
+stack.push(1);
+stack.push(2);
+stack.push(3);
+console.log(stack.pop()); // 3
+console.log(stack);       // [1, 2]
+
+// Cola (FIFO) con array
+const queue: number[] = [];
+queue.push(10);
+queue.push(20);
+queue.push(30);
+console.log(queue.shift()); // 10
+console.log(queue);         // [20, 30]
+
+// Dificultad extra
+
+// Navegador con pila
+class Browser {
+  private back: string[] = [];
+  private forward: string[] = [];
+  private current: string = "";
+
+  visit(page: string): void {
+    if (this.current) this.back.push(this.current);
+    this.current = page;
+    this.forward = [];
+    console.log(`Página actual: ${this.current}`);
+  }
+
+  goBack(): void {
+    if (this.back.length === 0) {
+      console.log("No hay páginas anteriores");
+      return;
+    }
+    this.forward.push(this.current);
+    this.current = this.back.pop()!;
+    console.log(`Página actual: ${this.current}`);
+  }
+
+  goForward(): void {
+    if (this.forward.length === 0) {
+      console.log("No hay páginas siguientes");
+      return;
+    }
+    this.back.push(this.current);
+    this.current = this.forward.pop()!;
+    console.log(`Página actual: ${this.current}`);
+  }
+}
+
+const browser = new Browser();
+browser.visit("google.com");
+browser.visit("github.com");
+browser.visit("typescriptlang.org");
+browser.goBack();
+browser.goBack();
+browser.goForward();
+
+// Impresora con cola
+class Printer {
+  private queue: string[] = [];
+
+  addDocument(name: string): void {
+    this.queue.push(name);
+    console.log(`Documento "${name}" añadido a la cola`);
+  }
+
+  print(): void {
+    if (this.queue.length === 0) {
+      console.log("No hay documentos en cola");
+      return;
+    }
+    const doc = this.queue.shift()!;
+    console.log(`Imprimiendo: ${doc}`);
+  }
+}
+
+const printer = new Printer();
+printer.addDocument("informe.pdf");
+printer.addDocument("factura.pdf");
+printer.addDocument("contrato.docx");
+printer.print();
+printer.print();
+printer.print();
+printer.print();