Question

我是JavaScript OO编程的新手，请耐心等待任何歧义。

我有一个方法需要一个对象作为其参数。必需对象设置要使用的方法的选项。

var objInstance = csvObj.getData({
    url: '', // csv url

    format: '', // return data format

    onComplete: function (output) {
           // a function that will display data returned
    }
});

csvObj定义如下

var csvObj = { 
    getData: function (o) {

        var format = o.format || 'json',  //optional options 
            url = o.url, callback = o.onComplete;   // required options

        function include_js(jsurl) {  // private function for performing cross dormain requests
            var script = document.createElement("script");
            script.type = "text/javascript";

            script.src = jsurl;
            document.getElementsByTagName("head")[0].appendChild(script);
        }


        (function () { // anonymous function for proccessing and returning data

            if (typeof  callback === 'function' && url) {  // if require options are defined

                if (!window.call_back) {    // and global call_back function is not yet defined
                    window.call_back = callback;  // define global call_back function (will be called when external script is loaded)
                }

                var restQuery = 'http://query.yahooapis.com/v1/public/yql?q=',
                query = 'select * from csv where url="' +  url + '" and columns="' + cols + '"', 

                yqlQuery = restQuery + encodeURIComponent(query)  + '&format=' + data + '&callback=call_back'; // create YQL query
                include_js(yqlQuery);  // create a cross dormain YQL request 
            } 
        else {
               alert('onComplete function or csv url not defined.'); // required options not defined
            }
        }());  

    }
};

问题：是否有更好的方法来处理对象参数，而不仅仅是像这样访问：

var privateProperty = object.property;或

var privateMethod = object.method;

Answer 1

您的方法完全有效。你也可以这样做：

var privateMethod = object['method'];

这对于动态获取属性非常方便，但通常我更喜欢object.method，因为它更容易阅读。

处理对象参数

1 个答案: