re: Maps in ES6 - A Quick Guide VIEW POST


Minor gripe, but why oh why is the interface of for each (value, key) and not (key,value) seems backwards.

Also that #entries doesn't expose normal higher order functions is a bit lame.


I agree, would've been nice with key, value. But forEach on arrays is val, key - so I can see why they did it that way.

I don't fully understand what you mean about entries though?

const map = new Map();
map.set('foo', 'bar');

// none of these are defined as entries is an
// iterator not a list

See it's weird that arrays are forEach((val, index)), and Object.entries(object).forEach(([key, value])... Just seems inconsistent.

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