Retrieving RoleAssignments via Javascript Client Object Model

Question

I am so stuck on the structure of this, I'm beating my head against a wall. I get the basics, and I understand the .load() that only bring in base values and if you have a property that's a collection you have to define it as well, but I can't get the syntax
right on rolling through the role assigments to get the name and type of permissions.
I start with 
ctx = new SP.ClientContext('/');
web = ctx.get_web();
list = web.get_lists().getByTitle('Links');
ctx.load(list, 'RoleAssignments');
//execute query
ctx.executeQueryAsync(GetListItemIdSuccess, GetListItemIdFail);
and yes, I'm doing this after sp.js load.
My GetListItemIdSuccess is where I want to run through the role assignments and list them out.
function GetListItemIdSuccess(sender, args) {
var collra = list.get_roleAssignments();
alert(collra.get_count());
The alert shows me there are 18 assignments, and that's correct, there are 18 groups and individuals given access. But I've tried running though it with .getEnumerator(), trying to access it as an array, etc, but all I get is either 'undefined' or the 'it
wasn't brought back in the query it hasn't been initialized. I'm not that strong of a javascript programmer to figure out the syntax. I've been using a debugger to look at the objects and their methods/properties, but I think they're just showing me basic
object properties.
All the blogs and examples I've read are adding to these collections, not just reading them. And if they're displaying properties, they're always simple string properties not running through collections.
Help?
Robin

Answer 1

Check if this helps.
http://www.codeproject.com/Articles/678653/How-to-check-user-permission-for-the-web-list-or-S
http://sharepoint.stackexchange.com/questions/80427/how-to-check-permissions-of-a-page-youre-not-currently-on-with-javascript
var siteUrl = '/mysites/MySiteCollections';
function sharePointReady()
var clientContext = new SP.ClientContext(siteUrl);
var oWebsite = clientContext.get_web();
this._currentUser = oWebsite.get_currentUser();
context.load(this._currentUser);
context.load(web,'EffectiveBasePermissions');
context.executeQueryAsync(Function.createDelegate(this,this.onSuccessMethod),
Function.createDelegate(this, this.onFailureMethod));
function onSuccessMethod(sender, args)
if (website.get_effectiveBasePermissions().has(SP.PermissionKind.editListItems)) {
alert('Nice, edit list permissions!');
else {
alert('Boo, no edit list permissions!');
function onRequestFailed(sender, args)
console.log('Error: ' + args.get_message());
alert('Request failed: ' + args.get_message() + '\n'+ args.get_stackTrace());
http://stackoverflow.com/questions/15935101/get-user-group-permissions-for-list-using-javascriptecmascript
http://social.msdn.microsoft.com/Forums/sharepoint/en-US/f21ad6b1-445a-497d-a286-d3ba8c2928a6/how-to-get-the-current-user-permission-level-on-a-list-item-with-ecmascript?forum=sharepointgeneralprevious