求解释js语法，应该是框架内的一段js，

[wateryh]

请帮忙在解释下这个语法，
特别不能理解的是，函数的定义，和函数传递方面的内容，

能逐行解释就太感谢了，

if ("undefined" == typeof I$) I$ = function() {
    var t = {},
    e = function() {
        return ! 1
    },
    i = {};
    var n = function(e, i) {
        return t.toString.call(e) === "[object " + i + "]"
    };
    return function(t, r) {
        var s = i[t],
        a = n(r, "Function");
        if (null != r && !a) s = r;
        if (a) {
            var o = [];
            for (var _ = 2,
            c = arguments.length; _ < c; _++) o.push(arguments.callee(arguments[_]));
            var h = {};
            o.push.call(o, h, {},
            e, []);
            var u = r.apply(null, o) || h;
            if (!s || !n(u, "Object")) s = u;
            else if (Object.keys) for (var l = Object.keys(u), _ = 0, c = l.length, f; _ < c; _++) {
                f = l[_];
                s[f] = u[f]
            } else for (var f in u) s[f] = u[f]
        }
        if (null == s) s = {};
        i[t] = s;
        return s
    }
} ();
I$(15,
function(t, e, i, n) {
    var r = Function.prototype;
    r._$aop = function(t, e) {
        var e = e || i,
        t = t || i,
        r = this;
        return function() {
            var i = {
                args: n.slice.call(arguments, 0)
            };
            t(i);
            if (!i.stopped) {
                i.value = r.apply(this, i.args);
                e(i)
            }
            return i.value
        }
    };
    r._$bind = function() {
        var t = arguments,
        e = arguments[0],
        i = this;
        return function() {
            var r = n.slice.call(t, 1);
            n.push.apply(r, arguments);
            return i.apply(e || null, r)
        }
    };
    r._$bind2 = function() {
        var t = arguments,
        e = n.shift.call(t),
        i = this;
        return function() {
            n.push.apply(arguments, t);
            return i.apply(e || null, arguments)
        }
    };
    var r = String.prototype;
    if (!r.trim) r.trim = function() {
        var t = /(?:^\s+)|(?:\s+$)/g;
        return function() {
            return this.replace(t, "")
        }
    } ();
    if (!this.console) this.console = {
        log: i,
        error: i
    };
    if (!0) {
        NEJ = this.NEJ || {};
        NEJ.copy = function(t, i) {
            t = t || {};
            i = i || e;
            for (var n in i) if (i.hasOwnProperty(n)) t[n] = i[n];
            return t
        };
        NEJ = NEJ.copy(NEJ, {
            O: e,
            R: n,
            F: i,
            P: function(t) {
                if (!t || !t.length) return null;
                var e = window;
                for (var i = t.split("."), n = i.length, r = "window" == i[0] ? 1 : 0; r < n; e = e[i[r]] = e[i[r]] || {},
                r++);
                return e;
            }
        });
        return NEJ
    }
    return t
});

[似梦飞花]

I$没有则定义 哪不懂啊

[wateryh]

经过一天的思考，有写思路了， 进来两个人，结贴给分

[ddgx]

好吧，进来要分的

[「已注销」]

分数干嘛使的