CODEWITHSUNDEEP
javascriptarrays
vt2424253
vt2424253

Reputation: 1427

How to split 1 key value into 2 keys values

I'm new to JavaScript. I have the following object:

let obj1 =
[{
  'id': 1,
  'longString': 'Joe - 2011-04-23T18:25:23.511Z'
},
{
  'id': 2,
  'longString': 'Mary - 2010-04-23T18:25:23.511Z'
}];

I want to split the longString key into 2 keys, and the value into 2 values.

Here is what I want to make:

let obj2 =
[{
  'id': 1,
  'name': 'Joe',
  'date': '2011-04-23T18:25:23.511Z'
},
{
  'id': 2,
  'name': 'Mary',
  'date': '2010-04-23T18:25:23.511Z'
}];

I've tried to do it in pieces, but I'm stuck with the first piece which is splitting the value of longString.

This works for string:

let v = 'Mary - 2010-04-23T18:25:23.511Z';
let w = v.split(' -', 1);

How do I make it work for an object? Or is there a totally different way to split property values? Also, do I need to write a loop to assign obj1 to obj2?

Upvotes: 2

Views: 873

Answers (3)

Aziz.G
Aziz.G

Reputation: 3721

let obj1 = [{
    'id': 1,
    'longString': 'Joe - 2011-04-23T18:25:23.511Z'
  },
  {
    'id': 2,
    'longString': 'Mary - 2010-04-23T18:25:23.511Z'
  }
];


const res = obj1.map(({
  id,
  longString
}) => ({
  id,
  name: longString.match(/\w+/)[0],
  date: longString.match(/\d+.*/)[0],
}))

console.log(res)

Upvotes: -1

adiga
adiga

Reputation: 35222

You could map over the array and split the longString for each object. Use destructuring to get the splits into name and date variables

let obj1 =
[{
  'id': 1,
  'longString': 'Joe - 2011-04-23T18:25:23.511Z'
},
{
  'id': 2,
  'longString': 'Mary - 2010-04-23T18:25:23.511Z'
}];

const output = obj1.map(a => {
  let [name, date] = a.longString.split(" - ");
  return { id: a.id, name, date }
})

console.log(output)

Upvotes: 4

Code Maniac
Code Maniac

Reputation: 37755

You can simply use map and \s+-\s+ pattern to split. second parameter of split is to specify the number of element we want in output

let obj1 =[{'id': 1,'longString': 'Joe - 2011-04-23T18:25:23.511Z'},{ 'id': 2, 'longString': 'Mary - 2010-04-23T18:25:23.511Z'}];

let op = obj1.map(({id, longString}) => {
  let [name, date] = longString.split(/\s+-\s+/,2)
  return { id, name, date }
})

console.log(op)

Upvotes: 2

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