How do I iterate over a dynamic keyed object?

Question

I have a hashed object where the keys are added dynamically through user selections.

I want to iterate over it and extract the values similar to the way I would do if it was simply an array: selections.map(cart => /*do stuff*/).

How can I achieve this?

get the keys to iterate over then get the value of the keys. — Loïc Faure-Lacroix, Aug 23 '16 at 12:49
Iterate over the keys and access the values that way? edit: Beaten by @LoïcFaure-Lacroix aha — N.J.Dawson, Aug 23 '16 at 12:49
Or in ES5 I think you can use `Object.keys(yourObject)` to get an array of all the object's keys... — Óscar Gómez Alcañiz, Aug 23 '16 at 12:50
`Object.values` always worth a mention: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/values — tymeJV, Aug 23 '16 at 12:52

Nina Scholz · Accepted Answer · 2016-08-23T12:56:07.313

7

Use Object.keys()

The Object.keys() method returns an array of a given object's own enumerable properties, in the same order as that provided by a for...in loop (the difference being that a for-in loop enumerates properties in the prototype chain as well).

var array = Object.keys(selections).map(k => selections[k]);
// get all values from the object

edited Aug 23 '16 at 12:56

answered Aug 23 '16 at 12:50

Nina Scholz

376,160
25
347
392

Does it return a new array or mutates the original? – S. Schenk Aug 23 '16 at 13:02
`Object.keys` returns a new array. it does not mutate the object. – Nina Scholz Aug 23 '16 at 13:04

How do I iterate over a dynamic keyed object?

1 Answers1