How to replace or append object to another object using Lodash

Question

I have 2 objects

{
    "Simon": { 
        "occupation": "garbage man",
        "age": "21"
    }
}

and this one

{
    "wife": "Kate"
}

How will I insert the second object to the first object to result as

{
    "Simon": { 
        "occupation": "garbage man",
        "age": "21",
        "wife": "Kate"
    }
}

And also can be applied even when wife exists:

{
    "wife": "Shandia"
}

Results to

{
    "Simon": { 
        "occupation": "garbage man",
        "age": "21",
        "wife": "Shandia"
    }
}

Is there a way to achieve this using lodash?

Why Lodash? Just Object.assign

CertainPerformance
– CertainPerformance

2018-07-27 04:49:55 +00:00
Commented Jul 27, 2018 at 4:49 — CertainPerformance
– CertainPerformance, Commented Jul 27, 2018 at 4:49

31piy · Accepted Answer · 2018-07-27 04:50:30Z

2

You don't need lodash for it. Use Object.assign to do that in plain JS. It works for the second case as well.

And if you really want to do it with lodash, use _.assign; it works the same.

var simon = {
  "Simon": {
    "occupation": "garbage man",
    "age": "21"
  }
}

var wife = {
  "wife": "Shandia"
};

Object.assign(simon.Simon, wife);
console.log(simon);

answered Jul 27, 2018 at 4:50

31piy

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1 Comment

The Bassman Over a year ago

Thanks mate! Very short and concise.

deerawan · Accepted Answer · 2018-07-27 06:28:17Z

1

As alternative, if you prefer to not change the original object (immutable way), you can use ES6 spread operator.

var simon = {
  "Simon": {
    "occupation": "garbage man",
    "age": "21"
  }
}

var wife = {
  "wife": "Shandia"
};

const simonWithWife = {
  Simon: {
    ...simon.Simon,
    ...wife
  }
}

console.log(simon); // doesn't get changed
console.log(simonWithWife);

answered Jul 27, 2018 at 6:28

deerawan

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1 Comment

31piy Over a year ago

Object.assign and _.assign already support doing this without mutating the original object.

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