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        // eliminate duplicates from array - use only for arrays containing
        // similar primitives (e.g. arrays of numbers, arrays of zip codes, etc.)
        // Credits to: https://stackoverflow.com/questions/9229645/remove-duplicates-from-javascript-array
        uniq: function (a) {
            var seen = {};
            return a.filter(function(item) {
                return seen.hasOwnProperty(item) ? false : (seen[item] = true);
            });
        },

        // pause main thread for n milliseconds
        //wait: function (ms) {
        //    var start = new Date().getTime();
        //    var end = start;
        //    while(end < start + ms) {
        //        end = new Date().getTime();
        //    }
        //},

    };