how can i convert object into an array in javascript?

Question

I got object from firebase like this way and i need to convert into an array i used a foreach with map but i didn't get success. i got 0 length of an array.

0: {id: "1", name: "Fever"}
1: {id: "2", name: "Cough"}
2: {id: "3", name: "Headache"}
3: {id: "4", name: "Stomach Pain"}

i used below method but it's not working

let result = [];

arr.forEach(item => {
  let resObj = result.find(resObj => resObj.Name === item.Name);
  resObj ? resObj.Count++ : result.push({'Name':item.Name, 'Value': item.Value, 'Count': 1});
});

console.log(result);

i need the output like this

[
{id: "1", name: "Fever"},{id: "2", name: "Cough"},{id: "3", name: "Headache"},{id: "4", name: "Stomach Pain"}
]

Can you please add what your expected result is to the question? — Nick Parsons
– Nick Parsons, Commented Mar 19, 2020 at 11:52
You are using 'Value': item.Value in your code but in your array you have only two keys: id & name. Please post a minimal reproducible example. — palaѕн
– palaѕн, Commented Mar 19, 2020 at 11:57
@NickParsons i want like this way [ {id: "1", name: "Fever"},{id: "2", name: "Cough"},{id: "3", name: "Headache"},{id: "4", name: "Stomach Pain"} ] — vivek manavadariya
– vivek manavadariya, Commented Mar 19, 2020 at 12:12
@vivekmanavadariya how does that differ from your input/what does your input look like? — Nick Parsons
– Nick Parsons, Commented Mar 19, 2020 at 12:13

sarvagya8 · Accepted Answer · 2020-03-19 12:27:36Z

3

You can do it like this:

let obj = {
  0: {
    id: "1",
    name: "Fever"
  },
  1: {
    id: "2",
    name: "Cough"
  },
  2: {
    id: "3",
    name: "Headache"
  },
  3: {
    id: "4",
    name: "Stomach Pain"
  }
};
let arr = [];
for (let key in obj) {
  arr.push(obj[key]);
}
console.log(arr);

The for ... in loop iterates over each obj key and push all the values of the obj in the arr.

edited Mar 19, 2020 at 12:27

answered Mar 19, 2020 at 12:20

sarvagya8

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Comments

Nick Parsons · Accepted Answer · 2020-12-24 04:59:26Z

You could use Object.values(), however, this doesn't guarantee an array with the same keys from your object. For example, if you had this situation:

{
  0: {id: "2", name: "Cough"},
  2: {id: "1", name: "Fever"} 
}

... then your result could look like (missing index 2):

[{id: "1", name: "Fever"}, {id: "2", name: "Cough"}]

thus, it doesn't abide by the index values provided in the object, but takes the values from the object and creates an array from those values. Instead, if you want to take the object's keys into account, you can merge the object with an array using Object.assign(), giving an empty value if a particular index is missing. The following also guarantees the order will be based on the index value:

const obj = {0: {id: "1", name: "Fever"}, 1: {id: "2", name: "Cough"}, 2: {id: "3", name: "Headache"}, 3: {id: "4", name: "Stomach Pain"}};

console.log(Object.assign([], obj));

Siva Kondapi Venkata · Accepted Answer · 2020-03-19 13:41:54Z

0

Just use Object.values

let obj = {
  0: {
    id: "1",
    name: "Fever"
  },
  1: {
    id: "2",
    name: "Cough"
  },
  2: {
    id: "3",
    name: "Headache"
  },
  3: {
    id: "4",
    name: "Stomach Pain"
  }
};

const res = Object.values(obj);

console.log(res);

answered Mar 19, 2020 at 13:41

Siva Kondapi Venkata

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