NodeJS: How to populate / overwrite an object with the values from a similar object

Question

.

globalscope.json:

"object1": {
    "thing1": "",
    "thing2": "",
    "thing3": ""
},
"search": {
    "tracking": {
        "crawl": false,
        "index": true
    }
}

localscope.json

"object1": {
    "thing1": "some",
    "thing2": "new",
    "thing3": "data"
},
"search": {
    "tracking": {
        "crawl": true, /* !! It should update the booleans etc */
        "index": true
    },
    "somethingnew": 777 /* !! new values would be awesome but not essential */
}

.

I found what looks to be a solution using C#, but I need JS / Node please.

I'm looking for an agnostic tool, although defining a schema in the beginning would be ok too.

Overlay data from JSON string to existing object instance

.

It needs to update all the similar properties in the first object? — Alex Khristo, May 04 '20 at 22:45
if the second object doesn't have them declared as blank, yes — user9779523, May 04 '20 at 22:47
You mean blank like ""? In that case you need to do it manually with recursion. — Alex Khristo, May 04 '20 at 22:49
You're essentially merging two objects. There's a popular package to do that, deepmerge. https://www.npmjs.com/package/deepmerge — terrymorse, May 04 '20 at 22:51
i figured it would be a popular thing, just didn't think of searching "merge" — user9779523, May 04 '20 at 22:58

score 0 · Answer 1 · answered May 04 '20 at 22:48

0

You could combine two objects with the rest operator (...) which works similar to Object.assign

Example:

const obj1 = {
  a: 2,
  b: 3,
  h: 10
}

const obj2 = {
  b: 11,
  a: 12
}

const obj3 = {...obj1, ...obj2}

The result would be

{a: 12, b: 11, h: 10}

answered May 04 '20 at 22:48

Alex Khristo

477
2
8

hmm its close. :) – user9779523 May 04 '20 at 22:56
@user9779523 notice the above comment, you could have problem with nesting in future. Use npm package 'deepmerge' with customMerge if you'll have problems with simple resting. – Alex Khristo May 04 '20 at 22:56

NodeJS: How to populate / overwrite an object with the values from a similar object

globalscope.json:

localscope.json

1 Answers1