TypeScript - Group objects by keys

Question

I have the following object:

const original = [{
        "key-8": {
            "some object"
        }
    },
    {
        "key-12": {
            "some object"
        }
    },
    {
        "key-12": {
            "some object"
        }
    },
    {
        "key-1": {
            "some object"
        }
    },
    {
        "key-8": {
            "some object"
        }
    }
]

As you can see I have two objects with key-8 and two with key-12 . I would like to combine them (the order does not matter) so the output will be:

{
    {
        "key-12": [{
                "some object"
            },
            {
                "some object"
            }
        ]
    }, {
        "key-1": {
            {
                "some object"
            }
        },
        {
            "key-8": [{
                    "some object"
                },
                {
                    "some object"
                }
            ]
        }
    }
}

I cannot make it works no matter what I try. I used reduce , I used regular forEach and other "hacks" simple do not work because TypeScript does not like them.

Can someone help please?

Answer 1

try this

 const orig = [ { "key-8": { "key": "...", "value": "...", "info": "..." } }, { "key-12": { "key": "...", "value": "...", "info": "..." } }, { "key-12": { "key": "...", "value": "...", "info": "..." } }, { "key-1": { "key": "...", "value": "...", "info": "..." } }, { "key-8": { "key": "...", "value": "...", "info": "..." } } ]; const result = orig.reduce(function (r, a) { const { key, ...others } = Object.values(a)[0]; r[Object.keys(a)] = r[Object.keys(a)] || []; r[Object.keys(a)].push(others); return r; }, Object.create(null)); console.log(result);