javascript - 移除圆形物体

Question

我有一个函数，我调用它来剪切超出一点的任何内容，但是有没有其他方法可以找到对自身的引用并以某种方式巧妙地删除该引用？

这是我现在使用的：

//Changing the max level will speed things up, but it will mean that some things might not be persisted
function cleanse(Obj, level) {
    var r, i, prims = ["string", "number", "boolean"], maxLevel = 8;
    level = level || 0;
    if (prims.indexOf(typeof Obj) !== -1) {
        r = Obj;
    } else if (Obj instanceof Function) {
        console.log("Please dont reference objects");
        return undefined;
    } else {
        if (Obj instanceof Array) {
            r = [];
        } else {
            r = {};
        }
        for (i in Obj) {
            if (Obj.hasOwnProperty(i)) {
                if (level <= maxLevel) {
                    r[i] = BackStack.cleanse(Obj[i], level + 1);
                }
            }
        }
    }
    return r;
};