Deduplicate an array of objects in javascript

dedupe-array-of-objects.js

 function deDupeArrayOfObjects(arr) {
    var tmpMap = {};
    arr.forEach(function(val) {
        var uniquekey = '';
        for(var k in val) {
            if(val.hasOwnProperty(k) && val[k]) {
                uniquekey += val[k].toString();
            }
        }
        tmpMap[uniquekey] = val;
    });
    var deDuped = [];
    for(var key in tmpMap) {
        deDuped.push(tmpMap[key]);
    }
    return deDuped;
}