CODEWITHSUNDEEP
javascript
chinmay patil
chinmay patil

Reputation: 71

Whats the best way to create dynamic array structure in javascript

I have to convert,

string1 : "test1.$.test2",

into

test1:[{
    test2:"{value will be assign later in the code}"
}]

I have de structured the string into test1 and test2 using split function, which gives me

How do I construct the above format from string? or is there any function in lodash or any npm package I can use?

Upvotes: 0

Views: 58

Answers (2)

Andy
Andy

Reputation: 63524

You can match on test followed by a number to return an array of matches, and then use computed property names to build the data structure.

const str = 'test1.$.test2';
const [ first, second ] = str.match(/test\d/g);

const data = {
  [first]: [
    { [second]: '' }
  ]
};

console.log(data);

Additional documentation

Upvotes: 1

Lzh
Lzh

Reputation: 3635

You can use { [myFieldVariable]: value } notation as follows:

myInput = "test1.$.test2"

fields = myInput.split('.$.'); // ['test1', 'test2']

myObject = {
    [fields[0]]: [ { [fields[1]]: "value assigned later" } ]
};

Now doing console.log(JSON.stringify(myObject, null, ' ')) shows that the object is in the structure you want.

{
   "test1": [
      {
         "test2": "value assigned later"
      }
   ]
}

Upvotes: 2

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