how to make object's array from several array

Question

For example,

I have a total of two arrangements.

The key array has keys.

The remaining arrays are multi arrays in one array like [[A], [B], [C], ...]

So how do we put objects in one array?

let key = [“name”, “age”, “country”];

let values = [["james", "23", "US"],["steve", "20", "UK"], ...]


** expect result **
result = [
    {
        "name": "james",
        "age": 23,
        "country": "US"
    },
    {
        "name": "steve",
        "age": 20,
        "country": "UK"
    },
    ...
]

can be done in a array map and inside do a foreach to create the object to return. you can get access to the array indices from foreach and that index can be used to get the value of the key in keys array — cmgchess
– cmgchess, Commented Jul 20, 2022 at 6:13

Simon L · Accepted Answer · 2022-07-20 06:26:10Z

1

Single line using array map and reduce functions:

values.map(v=>(key.reduce((acc, k, i) => ({...acc, [k]: v[i]}), {})));

(Note your original question contains non-ASCII quotation marks “” - you need to use " for valid JS syntax).

answered Jul 20, 2022 at 6:26

Simon L

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Comments

krishn kumar modanval · Accepted Answer · 2022-07-20 06:21:23Z

1

if you have data as name age and country with same keys so you can try below code it should work for you.

let values = [["james", "23", "US"],["steve", "20", "UK"], ...]
const result = [];

values.forEach(item => {
    const [name, age, country] = item;
    result.push({ name, age, country });
});

console.log(result)

answered Jul 20, 2022 at 6:21

krishn kumar modanval

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2 Comments

Randall Over a year ago

This is the cleanest approach with O(n) time

Simon L Over a year ago

Yes if you don't mind hard-coding the keys. OP has specifically provided a keys array...

Haris · Accepted Answer · 2022-07-20 06:16:45Z

0

I just asked your question to OpenAI JavaScript Codex and it returned this result.

/* let key = [“name”, “age”, “country”]; */
var key = ["name", "age", "country"];
/* let values = [["james", "23", "US"],["steve", "20", "UK"]] */
var values = [["james", "23", "US"],["steve", "20", "UK"]];
/* So how do we put objects in one array? */
var objects = [];
for (var i = 0; i < values.length; i++) {
  var object = {};
  for (var j = 0; j < key.length; j++) {
    object[key[j]] = values[i][j];
  }
  objects.push(object);
}

I really don't know if it works or not, but I am curious to see what it does. You should try this.

Please forgive me if it doesn't work. Thanks

answered Jul 20, 2022 at 6:16

Haris

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Comments

Bobby Morelli · Accepted Answer · 2022-07-20 06:51:22Z

0

const objs = values.map(
 (valSet) => 
  Object.fromEntries(
   valSet.map(
    (val,i) => [val,keys[i]]
   )
  )
);

make entry arrays and then use this

answered Jul 20, 2022 at 6:51

Bobby Morelli

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