bitovi/js-training

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?

John Hitz

@johnhitz

Great!!!

Madelene Campos

@Madelene

cool..thanks

Alexis Abril

@alexisabril

http://jsbin.com/hoyidi/latest/watch?js,output

Madelene Campos

@Madelene

because of the “new” keyword?

(just clarifying)

Joe Crick

@joe-crick

Are you asking if it's easier to understand Object.create because of the "new" keyword?

Madelene Campos

@Madelene

the proto pointing back because of the “new” keyword (sorry..had the beach ball of death for a bit)

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