added functions to iterate on objects

[nikhedonia]

In my opinion, a must have for trine.

This enables us to work with objects in an idiomatic way;
Let's get rid of this cumbersome Object.keys(obj) and replace it with:

var obj={a:1,b:2,c:3};
obj::keys()  // yields  keys of an object ( here : 'a','b','c' )
obj::values() // yields values of an object  ( here : 1,2,'3 )

// and to reduce repetition:

obj::pairs() // yield {key:'a',value:1} ... you get the idea 

I think a excellent source of inspiration is python's itertools...
In my next commit i'd like to introduce enumerate, zip, and some other functions

[jussi-kalliokoski]

Thanks for taking the time to contribute! ❤️

First things first: this should go into a category of its own: object. The category is meant to indicate what the type of this should be.

Other than that, instead of pairs, it should be entries and use the Object.entries function. That's consistent with how other key-value pairs are represented as iterators, e.g. [1,2,3].entries(), new Map(["foo", "bar"]).entries(). values can also use Object.values().

So ideally, these would just be wrappers around Object.keys(), Object.values() and Object.entries() that take the object as this and return an iterator instead of an array.

In my next commit i'd like to introduce enumerate, zip, and some other functions

Sounds great! Please make them separate PRs though. ;)

[jussi-kalliokoski]

Elsewhere in codebase the spacing with yield* is yield *

[jussi-kalliokoski]

also, four space indentation

[jussi-kalliokoski]

Sorry to nitpick about code style, haven't had the time to setup JSCS for the project yet, and unfortunately JSCS doesn't even have rules for a lot of things in the codebase yet. :) Looks good otherwise!

[jussi-kalliokoski]

This should be entries.

[nikhedonia]

ahhh, i feel your pain ;P
I see, i pushed too fast; ill be more careful!

[jussi-kalliokoski]

Sorry, and thanks for your patience! :D ❤️ Actually just re-checked the Flow docs and it should be Object as you originally had, and Flow has support for tuples, so we should use that for the entries - I'll put comments inline

[jussi-kalliokoski]

Back to {Object} :D

[nikhedonia]

haha... i'm today just to fast at pushing ... i drank to much coffee, i guess...

[jussi-kalliokoski]

haha... i'm today just to fast at pushing ... i drank to much coffee, i guess...

happens to the best of us :D

[jussi-kalliokoski]

Awesome, thank you! ❤️ 👍 🎉