JavaScript：允许访问您尝试访问的 attr 的 defineGetter 版本？

发布于 2024-08-21 05:12:15 字数 644 浏览 6 评论 0原文

我一直在寻找 JavaScript 中 Python 的 __getattr__ 的替代品，这里的几个答案提到了 Firefox 的 __defineGetter__。这不仅不跨浏览器兼容，而且实际上不允许您做任何真正有用的事情，就像这个伪代码所做的那样：

var api = function()
{
    var __getattr__ = function(attr, args)
    {
        var api_method = attr;
        $post(url, api_method, args, function(response){alert(response)});
    }
}

// Now api.getprofile('foo', 'spam'); would call the following code behind the scenes:
$post(url, 'getprofile', ['foo', 'spam'], function(response){alert(response)});

显然这是伪代码，但是有没有任何已知的方法可以在 JavaScript 中真正做到这一点？我知道我可以很好地使用手动版本（最后一行代码），但是当你达到大约 30 个函数时，这会变得非常乏味。

原文

I've been looking for a replacement for Python's __getattr__ in JavaScript, and a couple answers here mentioned Firefox's __defineGetter__. Not only is that not cross-browser compatible but it doesn't really allow for you to do anything really useful like this pseudo-code does:

var api = function()
{
    var __getattr__ = function(attr, args)
    {
        var api_method = attr;
        $post(url, api_method, args, function(response){alert(response)});
    }
}

// Now api.getprofile('foo', 'spam'); would call the following code behind the scenes:
$post(url, 'getprofile', ['foo', 'spam'], function(response){alert(response)});

Obviously this is pseudo code but is there any known way to do this for real in JavaScript? I understand I could very well use the manual version (the last line of code) but when you get to about 30 functions, this becomes very tedious.

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方圜几里 2024-08-28 05:12:15

var api = {
    getAttr:function(attr) {
        var args = [];
        for (var i = 1; i < arguments.length; i++) {
            args.push(arguments[i]);
        }
        $post(url, attr, args, function(response){alert(response)});
    }
};

这不是最漂亮的东西，而且行为也不太一样，但它应该可以工作。你必须这样调用它： api.getAttr('getprofile', 'foo', 'spam');

var api = {
    getAttr:function(attr) {
        var args = [];
        for (var i = 1; i < arguments.length; i++) {
            args.push(arguments[i]);
        }
        $post(url, attr, args, function(response){alert(response)});
    }
};

It's not the prettiest thing and doesn't act quite the same, but it should work. You'd have to call it like this: api.getAttr('getprofile', 'foo', 'spam');

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