Error while creating javascript object property

Question

I'm trying to create a javascript associative object, every thing works fine, but variable passed to create property name is not working, instead of storing variable value its converting variable into string and show variable name itself.

Quick Sample Below

var users = {};
var genID = someId;

createObj('userID', function(userID, username, email) {
users[userID] = { genID: { a: a, b: b, c: c, d: d } };
})

Expected result;

users = { 1: { 11: { a: 1, b: 2, c: 3, d: 4 } } }

Getting result;

users = { 1: { genID: { a: 1, b: 2, c: 3, d: 4 } } }

Please help me to resolve these. Thank You..

Mutahhir · Accepted Answer · 2012-10-05 19:00:04Z

2

If you look at what you did. The first thing worked: users[userID]. However, the second one genID didn't. That's because when you're using object notation, it assumes you're typing in the 'name' not a variable, so it doesn't resolve that. better would be:

var obj = {};
obj[genID] = {a: a, b: b, c: c, d: d};
users[userID] = obj;

answered Oct 5, 2012 at 19:00

Mutahhir

3,8323 gold badges23 silver badges27 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

sravis Over a year ago

Thanks a lot, i wasted my time debugging these and searching for ans over internet, Finally your answer resolved the issue. Thank you..

sravis Over a year ago

Small question, is there something like size limit for javascript associative object storage?

Mutahhir Over a year ago

:) If there is, i've not hit it yet, and I've made some pretty big objects at times. Don't worry, cross that bridge once you get there. This way you'll just waste time browsing for information you might never need. Just finish the project :)

Tomasz Nurkiewicz · Accepted Answer · 2012-10-05 18:59:50Z

2

You need square bracket syntax:

users[userID] = {};
users[userID][genID] = { a: a, b: b, c: c, d: d };

Basically genID must be used where expression is expected (inside square brackets). You are using it on the left side when object literal is expected. genID is treated there as a constant identifier and it is not evaluated.

answered Oct 5, 2012 at 18:59

Tomasz Nurkiewicz

342k72 gold badges713 silver badges680 bronze badges

Comments

Headshota · Accepted Answer · 2012-10-05 18:59:14Z

0

users[userID] = {};
users[userID][genID] = { { a: a, b: b, c: c, d: d } };

answered Oct 5, 2012 at 18:59

Headshota

21.4k13 gold badges63 silver badges82 bronze badges

Collectives™ on Stack Overflow

Error while creating javascript object property

3 Answers 3

3 Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

3 Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related