bitovi/js-training

Alexis Abril

@alexisabril

@ManuH Yep. “hasOwnProperty” is a method that exists on the Object.prototype.

Lotfi Harrabi

@lotfire

@ManuH yes

Emmanuel Hernandez

@ManuH

nice, thanks

Emmanuel Hernandez

@ManuH

module('new, dot, and dotcall');
test('DOT', function(){
var person = new Person('Alexis');
var species = DOT(person, 'species');
equal(species, 'Homo Sapien', 'property accessed');

what is 'equal'?

Alexis Abril

@alexisabril

@ManuH equal, deepEqual and ok are all QUnit assertion methods. We have a set of tests in the html just to validate the exercises

Emmanuel Hernandez

@ManuH

cool thanks

Alexis Abril

@alexisabril

np!

Emmanuel Hernandez

@ManuH

I'm still trying to do the DOTCALL

but I don't get what's supposed to do

Alexis Abril

@alexisabril

@ManuH DOTCALL simulates invoking a method on an object. For example:

person.speak(); //invokes the speak method, which may exist anywhere on the prototype, but uses “person” as “this”.

DOTCALL(person, ‘speak’); //will do the same as above

Imanuel Gittens

@imanuelgittens

Hi guys. I'm learning a lot from your training.

You're awesome

I'm trying to make the DOT function and I wanted some direction.

I'm thinking that to walk the proto chain, there must be some kind of loop involved

however i don't know when that loop should end

should it end when proto is equal to the window object?

Imanuel Gittens

@imanuelgittens

DOT = function(obj, prop) {

            if (obj.hasOwnProperty(prop)) {
                return obj[prop];
            } else {

                var parent = obj.__proto__;
                if(parent.hasOwnProperty(prop){
                    return parent[prop];  

                }
            }
        }

That's what I have so far

Imanuel Gittens

@imanuelgittens

DOT = function(obj, prop) {

            if (obj.hasOwnProperty(prop)) {
                return obj[prop];
            } else {
                return DOT(obj.__proto__, prop);
            }

        };

or maybe my second code snippet might work?

thanks

Alexis Abril

@alexisabril

hey everyone! we’ll get started shortly

to recap last week’s exercises: http://jsbin.com/yamuna/latest/watch?js,output

we’ll tackle that first

Imanuel Gittens

@imanuelgittens

I was really close to solving last week's exercise.

I forgot to check if the object existed

Joe Crick

@joe-crick

Nice!

Zurc

@Zurc

You said that you're setting proto but using prototype?

yes

John Hitz

@johnhitz

So proto is just the link or pointer to the prototype?

sorry that's proto

Joe Crick

@joe-crick

@Zurc: Was your question answered?

Zurc

@Zurc

I think I understood, still another question: Do we use proto in our code at all?

thanx!

Joe Crick

@joe-crick

NP!

Madelene Campos

@Madelene

same here

(thanks for repeating) :)

Joe Crick

@joe-crick

John Hitz

@johnhitz

Can you show that in the terminal

Joe Crick

@joe-crick

Are you asking to have the exercise shown in the terminal?

John Hitz

@johnhitz

Not using a different this for each dog1, dog2, and pup

Joe Crick

@joe-crick

@johnhitz Do you mean how to fix the example?

of the shared pup value?

John Hitz

@johnhitz

Yes

Imanuel Gittens

@imanuelgittens

Maybe you could just once over the slide with dog1, dog2, and pup?

Thank you

Joe Crick

@joe-crick

Sure thing!

John Hitz

@johnhitz

sorry can you make it bigger

Madelene Campos

@Madelene

(yes, please…bigger) :)

Joe Crick

@joe-crick

Is this size good?

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