Javascript Get flat array from object contain multiple arrays

Question

I'm trying to merge multiple arrays from one object using JavaScript(React-Native), the example of the object is :

{"10419": ["37046", "37047"], "9138": ["32809"]}

The result should be like so:

["37046","37047","32809"]

I need to ignore the object name and end up with only one flat array

I used flat() function but it seems not working as I need.

my try looks like :

    var obj = this.state.obj // will contain the object
    console.log(obj.flat()) // I know that work only with arrays but I tried it out

Thanks

Derek Wang · Accepted Answer · 2020-10-27 16:41:42Z

3

Using Object.values, you can get the values inside the object. That will be 2d array from your input.
Using Array.prototype.flat, you can make it as 1d array as follows.

const input = {"10419": ["37046", "37047"], "9138": ["32809"]}
const result = Object.values(input).flat();
console.log(result);

answered Oct 27, 2020 at 16:41

Derek Wang

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1 Comment

@Simon that depends on the browser, since object keys are not ordered.

Iyashi · Accepted Answer · 2020-10-27 16:42:51Z

2

Object.values(this.state.obj).flat()

answered Oct 27, 2020 at 16:42

Iyashi

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