Converts an object to a number.
@param {...Object} o The object to operate on.
@returns {Number} The object as a number.
@function
function getNumeric () {
                    var vals = [];
                    libs.object.every(arguments, function (o) {
                        vals.push(libs.object.isNumeric(o) ? parseFloat(o) : NaN);
                    });
                    return vals.length === 1 ? vals[0] : vals;
                }