Javascript Push array to array with unique key

Question

I have object with array like that:

const result = {
    key1: [],
    key2: [],
    key3: [],
    key4: []
};

And I want to push to one of the "key" something like that:

result.key1.push({key11: []})
result.key1.push({key12: []})
result.key1.push({key13: []})

But I need the result looks like that:

{
    key1: [
        key11: [],
        key12: [],
        key13: []
    ],
    key2: [],
    key3: [],
    key4: []
}

I tried almost everything did I miss something?

Arrays have keys that are positive integers, key11 is a object property — VLAZ
– VLAZ, Commented Jan 25, 2020 at 15:47
Rephrasing, Arrays can only have keys that are positive integers — TheMaster
– TheMaster, Commented Jan 25, 2020 at 15:48

Lazar Ljubenović · Accepted Answer · 2020-01-25 15:48:15Z

2

You're mixing up objects and arrays. Arrays have items in order, from 0 to length - 1, while objects have named keys. It seems that you're looking for having named keys, so you need to create an object instead.

const result = {
    key1: {},
    key2: {},
    key3: {},
    key4: {},
};

Now simply assign items.

result.key1.key11 = []
result.key1.key12 = []
result.key1.key13 = []

answered Jan 25, 2020 at 15:48

Lazar Ljubenović

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