how to convert json values in comma separated string using javascript

Question

I have following JSON string :

{"name":"Marine Lines","location_id":3},{"name":"Ghatkopar","location_id":2}

I want location_id as

3,2

Is that JSON string enclosed as an array? i.e. surrounded by []? — Mohit Bhardwaj
– Mohit Bhardwaj, Commented Oct 14, 2016 at 6:04
@Mitul - I've rolled back your edit because without hearing back from the OP I don't think we can just assume that their input string is different to what they've said it is. (Though obviously as is it is not valid JSON.) — nnnnnn
– nnnnnn, Commented Oct 14, 2016 at 6:21

Rajesh Dixit · Accepted Answer · 2016-10-14 06:16:04Z

27

Simple:

var data = [{"name":"Marine Lines","location_id":3},{"name":"Ghatkopar","location_id":2}]
var result = data.map(function(val) {
  return val.location_id;
}).join(',');

console.log(result)

I assume you wanted a string, hence the .join(','), if you want an array simply remove that part.

edited Oct 14, 2016 at 6:16

Rajesh Dixit

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answered Oct 14, 2016 at 6:05

Chrillewoodz

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2 Comments

Rajesh Dixit Over a year ago

FYI, .join by defaults join values by comma.

Chrillewoodz Over a year ago

@Rajesh Yes, but I added it for clarification.

Nina Scholz · Accepted Answer · 2016-10-14 06:34:10Z

5

You could add brackets to the string, parse the string (JSON.parse) and map (Array#map) the property and the join (Array#join) the result.

var string = '{"name":"Marine Lines","location_id":3},{"name":"Ghatkopar","location_id":2}',
    array = JSON.parse('[' + string + ']'),
    result = array.map(function (a) { return a.location_id; }).join();

console.log(result);

edited Oct 14, 2016 at 6:34

answered Oct 14, 2016 at 6:07

Nina Scholz

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2 Comments

Mohit Bhardwaj Over a year ago

OP had edited the question to add the enclosing square brackets.

nnnnnn Over a year ago

@MohitBhardwaj - That edit wasn't by the OP, and the OP hasn't replied to a query about it, so for now I've rolled that edit back.

Mahi · Accepted Answer · 2016-10-14 06:08:14Z

1

obj=[{"name":"Marine Lines","location_id":3}, {"name":"Ghatkopar","location_id":2}]
var res = [];
for (var x  in obj)
if (obj.hasOwnProperty(x))
    res.push(obj[x].location_id);
console.log(res.join(","));

answered Oct 14, 2016 at 6:08

Mahi

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Comments

Mitul · Accepted Answer · 2016-10-14 06:08:27Z

1

var json = [{"name":"Marine Lines","location_id":3},{"name":"Ghatkopar","location_id":2}];

var locationIds = [];
for(var object in json){
  locationIds.push(json[object].location_id);
}

console.log(locationIds.join(","));

answered Oct 14, 2016 at 6:08

Mitul

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Comments

Rajesh Dixit · Accepted Answer · 2016-10-14 06:19:07Z

1

You can also look into .reduce and create a string manually

var d = [{"name":"Marine Lines","location_id":3},{"name":"Ghatkopar","location_id":2}]

var location_id_str = d.reduce(function(p, c) {
  return p ? p + ',' + c.location_id : c.location_id
},'');

console.log(location_id_str)

edited Oct 14, 2016 at 6:19

answered Oct 14, 2016 at 6:13

Rajesh Dixit

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2 Comments

nnnnnn Over a year ago

This doesn't work if there are more than two objects in the array.

Abijith Ajayan Over a year ago

Perfect Solution. Mine more than 500 values, its took only 100ms time .

gurvinder372 · Accepted Answer · 2016-10-14 06:06:05Z

0

try this

    var obj = [{"name":"Marine Lines","location_id":3},{"name":"Ghatkopar","location_id":2}];
    var output = obj.map( function(item){
      return item.location_id;
    });
    console.log( output.join(",") )

answered Oct 14, 2016 at 6:06

gurvinder372

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Comments

Mohit Bhardwaj · Accepted Answer · 2016-10-14 06:06:35Z

0

var arr = [{"name":"Marine Lines","location_id":3},{"name":"Ghatkopar","location_id":2}];

var location_array = [];
for( var i = 0; i < arr.length; i++ )
{
  location_array.push( arr[i].location_id );
}//for

var location_string = location_array.join(",");
console.log(location_string);

Note: You may need to use JSON.parse() if the arr is in string format initially.

answered Oct 14, 2016 at 6:06

Mohit Bhardwaj

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Comments

guest271314 · Accepted Answer · 2016-10-14 06:27:55Z

0

You can use for..of loop

var arr = [{
  "name": "Marine Lines",
  "location_id": 3
}, {
  "name": "Ghatkopar",
  "location_id": 2
}];

var res = [];

for ({location_id} of arr) {res.push(location_id)};

console.log(res);

answered Oct 14, 2016 at 6:27

guest271314

1

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