var objectKeys = require('./keys');

module.exports = function (obj, key) {
    if (Object.prototype.propertyIsEnumerable) {
        return Object.prototype.propertyIsEnumerable.call(obj, key);
    }
    var keys = objectKeys(obj);
    for (var i = 0; i < keys.length; i++) {
        if (key === keys[i]) return true;
    }
    return false;
};