JS: How to extract nested string of object?

Question

I got an array with following data structure:

[
  { 
    _id: 'dgPMHw3ivRSp3wyWe',
    content: { 
      en: [{ content: 'foo', extended: 'bar' }, {...}],
      it: [{ content: 'any', extended: 'thing' }, {...}]
    },
    order: 1,
    parent: 'Dn59y87PGhkJXpaiZ'
  },
  {...}
]

I need to modify this array to get only string values for content by selecting the first element of a specific language.

So for the english language the result should be:

[
  { 
    _id: 'dgPMHw3ivRSp3wyWe',
    content: 'foo',
    extended: bar,
    order: 1,
    parent: 'Dn59y87PGhkJXpaiZ'
  }
]

I know I could get the string with

const language = 'en'
array.forEach(doc => {
  console.log(doc.content[language][0].content)
  console.log(doc.content[language][0].extended)
})

But how do I replace it to get my result?

Did you look at my answer....? Just curious.

user5734311
– user5734311

2017-12-09 02:45:45 +00:00
Commented Dec 9, 2017 at 2:45 — user5734311
– user5734311, Commented Dec 9, 2017 at 2:45

user5734311 · Accepted Answer · 2017-12-09 02:26:34Z

3

Here's how without having to list each property:

var array = [{
  _id: 'dgPMHw3ivRSp3wyWe',
  "content": {
    en: {
      content: 'foo',
      extended: 'bar'
    },
    it: {
      content: 'any',
      extended: 'thing'
    }
  },
  order: 1,
  parent: 'Dn59y87PGhkJXpaiZ'
}];

const language = "en";
array = array.map(doc => {
  doc = Object.assign(doc, doc.content[language]);
  return doc;
});
console.log(array);

answered Dec 9, 2017 at 2:26

user5734311

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2 Comments

user3142695 Over a year ago

The language elements are array, so I used doc.content[language][0]

user5734311 Over a year ago

@user3142695 I don't know what else is in those arrays, but my code retains all the en information, regardless of its structure.

Khiem Tran · Accepted Answer · 2017-12-09 02:21:20Z

3

You can do so:

  let result = data.map(e => ({
        ...e, 
        content: e.content[language].content,
        extended: e.content[language].extended
  }));

answered Dec 9, 2017 at 2:21

Khiem Tran

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1 Comment

user3142695 Over a year ago

I do get a syntax error: Unexpected token for ...e

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