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AROUND ANGULAR 2 the hard way

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@MUKKOO

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STARTING WITH NG2

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WHAT WE NEED TO LEARN

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REDUX WEBPACK NODEJS IMMUTABLEJS TESTING STACK

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ES6 & TYPESCRIPT RXJS ZONEJS ANGULAR 2

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ES6 AND TYPESCRIPT

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TS IS A ES6 SUPERSET

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ES6 ES5 TS

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ES6 CLASSES export class Hero { id: number; name: string; }

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ES6 TEMPLATE STRINGS template: `

${title}

{{hero.name}}

`

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ES6 ARROW FUNCTIONS heroes => { this.heroes = heroes }

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TS TYPE INFORMATIONS add(a: number, b?: number) => { return a + b; } let list: number[] = [1,2,3]; let isDone: boolean = false;

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TS CLASSES CAN BE TYPES class Bar { bar: Foo } let bar = new Bar(new Foo()) // valid let bar = new Bar(new Baz()) // error

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TS INTERFACES interface Person { firstName: string[]; lastName: string; } let mat_gan:Person = { firstName: ['Mohandas', 'Karamchand'], lastName: 'Gandhi' }

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TS DECORATORS @Component({ selector: 'hero', templateUrl: 'hero.component.html', }) export class HeroComponent { … }

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ES6 AND TYPESCRIPT recap

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CLASSES TEMPLATE STRINGS TYPES DECORATORS

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RXJS AKA OBSERVABLE

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OBSERVABLE ARE THE NEW PROMISES

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ASYNCHRONOUS DATA STREAMS

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THIS IS REACTIVE PROGRAMMING

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MANAGE DATA STREAM

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this.http.get(url) .retryWhen(err => err.delay(500)) .timeout(2000, new Error(‘…’)) .map( data => { return data.json(); }) .catch(this.handleError);

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RXJS AKA OBSERVABLE recap

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REACTIVE PROGRAMMING

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ZONEJS

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IT’S AN EXECUTION CONTEXT

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ASYNC JAVASCRIPT // code a(); setTimeout(b, 0); setTimeout(c, 0); d(); // run order // queue a b c d

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TIMING // code start(); a(); setTimeout(b, 0); setTimeout(c, 0); d(); stop(); // start a d // stop b // missed! c // missed!

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CONTEXT zone.run(function() { a(); setTimeout(b, 0); setTimeout(c, 0); d(); });

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ASYNC TASKS IN THE SAME ZONE

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TRANSITIVE function first() { setTimeout(second, 0); } function second() { setTimeout(third, 0); } function third() { … } zone.run(first);

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PATCH CODE AT RIGHT TIME

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DEBUG

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PROFILING

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ZONEJS recap

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EXECUTION CONTEXT FOR ASYNC TASKS

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ANGULAR IS HARD

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ANGULAR IS HUGE

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THERE IS A LOT OF INTERESTING THINGS

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Q&A @MUKKOO