If objects are the same

Question

Is it possible to check if a json is 'valid', by valid I mean the same type: for example

{"name": "John Doe", "username": "jhndoe"}

and

{"name": "Jane Doe", "username": "jane12"}

would be the same, but

{"name": "Ann Onymouse", "username": "anon"}

and

{"name": true, "age": "24"}

wouldn't.

What rule are you following? The type of the value of `name`? Or the fact one has `username` but the other has `age`? Or...? — T.J. Crowder, Jan 08 '18 at 18:00
Why is `Ann Onymouse` not the same? I think we need more information about the rules. — Explosion Pills, Jan 08 '18 at 18:01
@ExplosionPills OP indicating #1 & #2 are same...#3 & #4 are not — charlietfl, Jan 08 '18 at 18:04
None of those examples are valid JSON (i.e. they are all the same because a parser would throw an exception trying to parse them) — Quentin, Jan 08 '18 at 18:05
Your question makes no sense... as all those objects are not valid (from syntax point of view) and 3rd object from your description should be valid... and if it's invalid, I have no idea what do you mean by "valid" — Flash Thunder, Jan 08 '18 at 18:06

NullDev · Accepted Answer · 2018-01-08T18:10:57.533

2

If you want to compare two objects to see if they have the same set of keys, you can do it like this:

if (JSON.stringify(Object.keys(yourFirstObject).sort()) == JSON.stringify(Object.keys(yourSecondObject).sort())){
    alert("Same set of keys!");
}

Note however, that the given JSON Object example in your question is invalid. If that was just a mistake, you can still use this code on valid JSON Objects.

Example:

var obj1 = {"name": "John Doe", "username": "jhndoe"};
var obj2 = {"name": "Jane Doe", "username": "jane12"};

if (JSON.stringify(Object.keys(obj1).sort()) == JSON.stringify(Object.keys(obj2).sort())){
    console.log("Same set of keys!");
}

edited Jan 08 '18 at 18:10

answered Jan 08 '18 at 18:05

NullDev

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I started to write similar answer, but stopped on the third object that is invalid (thats what op says). So your answer to given question is not correct :-) – Flash Thunder Jan 08 '18 at 18:07
@FlashThunder The given example of a JSON Object in the question was invalid. This could have been a simple mistake made by OP which does not make my answer incorrect. I edited my answer to point that out. – NullDev Jan 08 '18 at 18:09

If objects are the same

1 Answers1