Convert Javascript string or array into JSON object

Question

I have a JavaScript variable with comma separated string values - i.e. value1,value2,value3, ......,valueX,

I need to convert this variable's values into a JSON object. I will then use this object to match user enteredText value by using filterObj.hasOwnProperty(search)

Please help me to sort this out.

As there is no such thing as a "Json object", it's hard to get what you want. Maybe you should look at [what is JSON](http://www.json.org/) ? — Denys Séguret, Mar 27 '13 at 08:11
You can match entered text by just doing `str.indexOf(search) != -1` — adeneo, Mar 27 '13 at 08:22

score 3 · Answer 1 · answered Mar 27 '13 at 08:24

3

What you seem to want is to build, from your string, a JavaScript object that would act as a map so that you can efficiently test what values are inside.

You can do it like this :

var str = 'value1,value2,value3,valueX';
var map = {};
var tokens = str.split(',');
for (var i=tokens.length; i--;) map[tokens[i]]=true;

Then you can test if a value is present like this :

if (map[someWord]) {
    // yes it's present
}

answered Mar 27 '13 at 08:24

Denys Séguret

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thank you guys. You really save my click. Your solutions are working for me. thank you again. – user1621860 Mar 27 '13 at 09:24
Dude. `for (var i = tokens.length; i--;)`, really? Even `while` is more readable. – Florian Margaine Mar 27 '13 at 09:29
Well. It saved a click. You can't argue against that. – Denys Séguret Mar 27 '13 at 09:30

score 2 · Answer 2 · edited May 23 '17 at 12:22

Why JSON? You can convert it into an array with split(",").

var csv = 'value1,value2,value3';
var array = csv.split(",");
console.log(array); // ["value1", "value2", "value3"]

Accessing it with array[i] should do the job.

for (var i = 0; i < array.length; i++) {
    // do anything you want with array[i]
}

JSON is used for data interchanging. Unless you would like to communicate with other languages or pass some data along, there is no need for JSON when you are processing with JavaScript on a single page.

score 0 · Answer 3 · answered Jul 04 '16 at 18:16

0

JavaScript has JSON.stringify() method to convert an object into JSON string and similarly JSON.parse() to convert it back. Read more about it

All about JSON : Why & How

Cheers!!

answered Jul 04 '16 at 18:16

Cheezy Code

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score -1 · Answer 4 · answered Mar 27 '13 at 09:19

-1

JSON format requires (single or multi-dimensional) list of key, value pairs. You cannot just convert a comma separated list in to JSON format. You need keys to assign.

Example,

[
  {"key":"value1"},
  {"key":"value2"},
  {"key":"value3"},
  ...
  {"key":"valueX"}
]

I think for your requirement, you can use Array.

answered Mar 27 '13 at 09:19

Firnas

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["value1", "value2", "value3"] is a valid JSON array – AksharRoop Dec 26 '13 at 19:55

Convert Javascript string or array into JSON object

4 Answers4