Angular ngFor

<!doctype html>
<html>
  <head>
    <base href=".">
    <title>Angular + TypeScript</title>
    <link rel="stylesheet" href="style.css" />
    <script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script>
    <script src="https://unpkg.com/zone.js/dist/zone.js"></script>
    <script src="https://unpkg.com/zone.js/dist/long-stack-trace-zone.js"></script>
    <script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script>
    <script src="https://unpkg.com/systemjs@0.19.31/dist/system.js"></script>
    <script src="config.js"></script>
    <script>
    System
      .import('app')
      .catch(console.error.bind(console));
  </script>
  </head>
  <body>
    <app-root>
      Loading...
    </app-root>
  </body>
</html>

/* Styles go here */

System.config({
  //use typescript for compilation
  transpiler: 'typescript',
  //typescript compiler options
  typescriptOptions: {
    emitDecoratorMetadata: true,
    target: 'es5'
  },
  paths: {
    'npm:': 'https://unpkg.com/'
  },
  //map tells the System loader where to look for things
  map: {
    'app': './src',
    '@angular/core': 'npm:@angular/core/bundles/core.umd.js',
    '@angular/common': 'npm:@angular/common/bundles/common.umd.js',
    '@angular/compiler': 'npm:@angular/compiler/bundles/compiler.umd.js',
    '@angular/platform-browser': 'npm:@angular/platform-browser/bundles/platform-browser.umd.js',
    '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js',
    'rxjs': 'npm:rxjs',
    'typescript': 'npm:typescript@2.1.5/lib/typescript.js'
  },
  //packages defines our app package
  packages: {
    app: {
      main: './main.ts',
      defaultExtension: 'ts'
    },
    rxjs: {
      defaultExtension: 'js'
    }
  }
});

import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { AppModule } from './app.module';

platformBrowserDynamic().bootstrapModule(AppModule);

import { Component, OnInit } from '@angular/core';
import { Observable } from 'rxjs/Observable';
import 'rxjs/add/observable/of';

interface Contact {
  name: string,
  age: number,
  email: string
}

@Component({
  selector: 'app-root',
  template: `
    <div class="app">
      <ul>
        <li *ngFor="let contact of contacts | async; let i = index; let c = count;">
          Index: {{ i }}
          Count: {{ c }}
          <contact-card [contact]="contact"></contact-card>
        </li>
      </ul>
    </div>
  `
})
export class AppComponent implements OnInit {
  contacts: Observable<Contact[]>;
  ngOnInit() {
    this.contacts = Observable.of([
      {
        "id": 1,
        "name": "Laura",
        "email": "lbutler0@latimes.com",
        "age": 47
      },
      {
        "id": 2,
        "name": "Walter",
        "email": "wkelley1@goodreads.com",
        "age": 37
      },
      {
        "id": 3,
        "name": "Walter",
        "email": "wgutierrez2@smugmug.com",
        "age": 49
      },
      {
        "id": 4,
        "name": "Jesse",
        "email": "jarnold3@com.com",
        "age": 47
      },
      {
        "id": 5,
        "name": "Irene",
        "email": "iduncan4@oakley.com",
        "age": 33
      }
    ]);
  }
}

import { Component, Input } from '@angular/core';

@Component({
  selector: 'contact-card',
  template: `
    <div class="contact-card">
      <p>{{ contact.name }} ( {{ contact.age }} )</p>
      <p>{{ contact.email }}</p>
    </div>
  `
})
export class ContactCardComponent {
  
  @Input()
  contact;
  
}

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';

import { ContactCardComponent } from './contact-card.component';

import { AppComponent } from './app.component';

@NgModule({
  declarations: [
    AppComponent,
    ContactCardComponent
  ],
  imports: [
    BrowserModule
  ],
  bootstrap: [
    AppComponent
  ]
})
export class AppModule {}