Does writeJSON method of fs-extra module maintain the order of Object?

Asked Jul 02 '21 at 08:17

Active Jul 02 '21 at 08:17

Viewed 78 times

I am new to nodejs, I have an object of enumerable objects which has data like below:

const obj = {
    "id3" : {
       "userName":"name3",
       "age":"age3"
    },
    "id2" : {
       "userName":"name2",
       "age":"age2"
    },
    "id1" : {
       "userName":"name1",
       "age":"age1"
    },
    ...
}

when I want to dump this object to a file using writeJSON method of fs-extra, Is the order maintained? i.e., when I am reading it by readJSON method will I get the object in the same order?

asked Jul 02 '21 at 08:17

lakshmiravali rimmalapudi

1

If you care about order you should be using an array. – Barmar Jul 02 '21 at 08:25
Eventhough, `Object.keys` returns a specific order of keys, strictly speaking there is no "order" in an Object, and you shouldn't rely on any specific order while iterating an object. – derpirscher Jul 02 '21 at 08:30
I don't want to use array because I want to get the data by id frequently. What would be the better way to do this? Is it better to use Map(https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map)? – lakshmiravali rimmalapudi Jul 02 '21 at 08:43
If you get your data by key anyways, why would the order within the object be of any relevance? – derpirscher Jul 02 '21 at 09:58
If the key is not provided, I should return the first inserted entry - that's the use case. – lakshmiravali rimmalapudi Jul 02 '21 at 12:03

Does writeJSON method of fs-extra module maintain the order of Object?

0 Answers0