Dynamically Forming a JSON object traversion without using eval.

Posted by Matt Willhite on Stack Overflow See other posts from Stack Overflow or by Matt Willhite
Published on 2010-03-26T20:20:14Z Indexed on 2010/03/26 20:23 UTC
Read the original article Hit count: 311

Filed under:

JavaScript

|

eval

|

JSON

Given I have the following: (which is dynamically generated and varies in length)

associations = ["employer", "address"];

Trying to traverse the JSON object, and wanting to form something like the following:

data.employer.address

or

data[associations[0]][association[1]]

Without doing this:

eval("data."+associations.join('.'));

Finally, I may be shunned for saying this, but is it okay to use eval in an instance like this? Just retrieving data.

© Stack Overflow or respective owner

Related posts about JavaScript

CHAT ROOMs 7 by 6

as seen on Stack Overflow - Search for 'Stack Overflow'
I am looking for chatroom on one page with 7 loggedin users and 6+rows for say 42 users.these users will keep on adding wthnew users.Need urgent help.A PRETTY UNUSUAL Q FOR MOST OF U.What is MORE REQ new features: Usernames are unique to users currently chatting You can see a "currently chatting"… >>> More
Integrating JavaScript Unit Tests with Visual Studio

as seen on Stephen Walter - Search for 'Stephen Walter'
Modern ASP.NET web applications take full advantage of client-side JavaScript to provide better interactivity and responsiveness. If you are building an ASP.NET application in the right way, you quickly end up with lots and lots of JavaScript code. When writing server code, you should be writing… >>> More
Has Javascript developed beyond what it was originally designed to do?

as seen on Programmers - Search for 'Programmers'
I've been talking with a friend about the purpose of Javascript, when and how it should be used, etc. He quoted that: JavaScript was designed to add interactivity to HTML pages [...] JavaScript gives HTML designers a programming tool HTML authors are normally not programmers… >>> More
PHP, javascript, single quote problems with IE when passing variable from ajax post to javascript fu

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi! I have been trying to get this to work for a while, and I suspect there's an easy solution that I just can't find. My head feels like jelly and I would really appreciate any help. My main page.php makes a .post() to backend.php and fetches a list of cities which it echoes in the form of: <li… >>> More
Javascript in XSL that is loaded by Javascript

as seen on Stack Overflow - Search for 'Stack Overflow'
Is there anyway to have javascript run when a XSL sheet has been applied to an XML file by Javascript? I am using a JQuery plugin to apply the sheet to the xml but the javascript that is located inside of the XSL file will not run. I put the Javascript at the bottom of the file and it still does… >>> More

Related posts about eval

How to execute "eval" without writing "eval" in JavaScript

as seen on Stack Overflow - Search for 'Stack Overflow'
Here's the deal, we have a big JS library that we want to compress, but YUI compressor doesn't fully compress the code if it finds an "eval" statement, out of fear that it will break something else. That's great and all, but we know exactly what is getting eval'd, so we don't want it to get conservative… >>> More
Can I get the "value" of an arbitrary statement in JavaScript (like eval does, but without eval)

as seen on Stack Overflow - Search for 'Stack Overflow'
In JavaScript is there a way to get the "value" of a statement in the same way that function() { return eval("if (true) { 1 }"); } returns "1"; function() { return if (true) { 1 } } and all similar permutations I've tried are not valid syntax. Is eval just blessed with special powers to determine… >>> More
GNU Make: How to call $(wildcard) within $(eval)

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm trying to create a generic build template for my Makefiles, kind of like they discuss in the eval documentation. I can't seem to get the wildcard function to work within an eval. The basic code I'm having issues with looks like this. SRC_DIR = ./src/ PROG_NAME = test define PROGRAM_template … >>> More
Workaround for GNU Make 3.80 eval bug

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm trying to create a generic build template for my Makefiles, kind of like they discuss in the eval documentation. I've run into a known bug with GNU Make 3.80. When $(eval) evaluates a line that is over 193 characters, Make crashes with a "Virtual Memory Exhausted" error. The code I have that… >>> More
Is it possible to create a generic Util Function to be used in Eval Page

as seen on Stack Overflow - Search for 'Stack Overflow'
I am currently binding a Nullable bit column to a listview control. When you declare a list view item I need to handle the case when the null value is used instead of just true or false. <asp:Checkbox ID="Chk1" runat="server" Checked='<%# HandleNullableBool(Eval("IsUsed")) %>' /> Then… >>> More