Javascript String to JSON

Question

How to can get this

var myString = 'a,b';

in the following in most efficient way

var myObject = { a:1, b:1};

I need 1 to be associated with each param. Thank you.

Please take the time to read what JSON is. The first paragraph would suffice, I think. — Denys Séguret
– Denys Séguret, Commented Nov 7, 2012 at 16:47
What are you asking exactly, how does what get into what? That first line is an error? You missing ""? — epascarello
– epascarello, Commented Nov 7, 2012 at 16:50
beating the computer works sometimes when Abrakadabra fails lol.. — Sajjan Sarkar
– Sajjan Sarkar, Commented Nov 7, 2012 at 16:51

Denys Séguret · Accepted Answer · 2012-11-07 16:58:57Z

5

Supposing your string is really defined as

var myString = 'a,b';

then you can get your object as

var obj = {};
var t = myString.split(',');
for (var i=0; i<t.length; i++) obj[t[i]] = 1;

This would make an obj just like

var obj = { a:1, b:1};

Note that I didn't get your goal so this might be useless...

A side remark :

JSON is a text format used for data exchange. There is nothing like a JSON object. { a:1, b:1} is just a plain javascript object with two properties.

If what you want is really JSON, you may do

var myJSON = JSON.stringify(obj);

Tis would be equivalent to

var myJSON = '{"a":1,"b":1}';

edited Nov 7, 2012 at 16:58

answered Nov 7, 2012 at 16:50

Denys Séguret

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3 Comments

jAndy Over a year ago

this is a ridiculouse answer..., if it didn't have the last line I would have considered to even downvote :p

Denys Séguret Over a year ago

@jAndy Why is this ridiculous ? I does the required job (or at least the requested one).

Me Unagi Over a year ago

Thank you dystroy for quick and elaborate answer. Just the script I was looking for. Sorry about the silly mistakes regarding string closure and calling object a JSON. Had a long day. Thank you, you guys are the best !!!!

Naftali · Accepted Answer · 2012-11-07 16:49:10Z

1

var myString = a,b; does not do what you think it does.

What that does it set myString equal to the value of a and b as a undefined.

To do what you want to do, just write this:

var myJSON = { a:1, b:1};

and p00f, it just works.

The above was applicable before the ninja edit of the OP.

answered Nov 7, 2012 at 16:49

community wiki

Naftali

Comments

I Hate Lazy · Accepted Answer · 2012-11-07 17:08:47Z

1

You can use .split() and .reduce() for this.

var result = myString.split(',')
                     .reduce(function(obj, key) {
                         return obj[key] = 1, obj;
                     }, {});

You'll need a shim for older JavaScript implementations.

edited Nov 7, 2012 at 17:08

answered Nov 7, 2012 at 16:50

I Hate Lazy

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2 Comments

Denys Séguret Over a year ago

To be more precise about the "older JavaScript implementations", this won't work with IE8 (not a critic, just a precision).

I Hate Lazy Over a year ago

@dystroy: That's a fair clarification. I'm being lazy today.

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