How to get value from specific key in NodeJS JSON [duplicate]

Question

{
    "id": 83,
    "key": "hello",
    "en": "Hello",
    "mm": "This is greeting",
    "created_at": "2016-12-05T10:14:02.928Z",
    "updated_at": "2017-01-31T02:57:11.181Z"
}

I'm trying to get value from mm key in NodeJS. I've tried to get translation["mm"] but it does not work at all. Please help me how to get mm from above data.

My current node version is 5.11

Is that JSON in an array? You may need to iterate that, then grab it (translation[index]["mm"]) — Sterling Archer
– Sterling Archer, Commented Jan 31, 2017 at 4:06
If it is a JavaScript Object (already parsed from a JSON string), you might be able to access the fields with translation.mm or translation['mm']. If it's a string, you should parse it first with JSON.parse(string). — luiscrjr
– luiscrjr, Commented Jan 31, 2017 at 4:08
@mrlew he already is using translation["mm"] as you can see, there's another factor here we're not seeing. — Sterling Archer
– Sterling Archer, Commented Jan 31, 2017 at 4:09
@SterlingArcher sure, was just pointing that it should work if it's a JavaScript Object. — luiscrjr
– luiscrjr, Commented Jan 31, 2017 at 4:13

Vikas · Accepted Answer · 2017-01-31 04:14:28Z

26

Edited The Answer. Now Its working for above object in question

You can use following function to access the keys of JSON. I have returned 'mm' key specifically.

    function jsonParser(stringValue) {

       var string = JSON.stringify(stringValue);
       var objectValue = JSON.parse(string);
       return objectValue['mm'];
    }

edited Jan 31, 2017 at 4:14

answered Jan 31, 2017 at 4:09

Vikas

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2 Comments

Sterling Archer Over a year ago

he already is using translation["mm"] which is correct, this does not answer the issue. The object does not need to be parsed either, it's already valid JSON

luiscrjr Over a year ago

@SterlingArcher JSON always need to be parsed to JavaScript Object. JSON is a string notation.

adonike · Accepted Answer · 2017-01-31 04:09:34Z

18

JSON is an interchange format, meaning it's only a text representing data in a format that many applications can read and translate into it's own language.

Therefore, using node.js you should parse it first (translate it to a javascript object) and store the result in a variable:

var obj = JSON.parse(yourJSONString);

Then, you can ask for any of it properties:

var mm = obj.mm;

answered Jan 31, 2017 at 4:09

adonike

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2 Comments

adonike Over a year ago

indeed, it's a valid JSON. That's why i suggest to parse it first: to deal with an object instead of dealing with a JSON; since I don't know if it's another variable or anything else.

Mario Codes Over a year ago

This provided the easiest and best explanation for me. Accepted answer didn't work.

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