return all unique classes and ids (or other attributes) of children contained within a html element (requires jquery)

gistfile1.js

(function(){
    var containedElems = $('#container *');
    var findAttribs = {
        'class': [],
        'id': []
    };

    containedElems.each(function(i, elem){
        for(var curAttrib in findAttribs){
            var elemAttrib = $(elem).attr(curAttrib)
            if(typeof elemAttrib === 'string'){
                findAttribs[curAttrib] = findAttribs[curAttrib].concat(elemAttrib.split(" "));
            }
            if(i === containedElems.length-1){
                findAttribs[curAttrib] = findAttribs[curAttrib].sort().filter(function(el,i,a){if(i==a.indexOf(el))return 1;return 0}) // http://stackoverflow.com/a/7076202/404799
            }
        }
    })
    return findAttribs;
}).call(this);