树结构Json数据格式转换

/**
* 转换level树json奋斗
 * 
*/

var toTreeNode = function (nodes) {

    var nodes = JSON.parse(JSON.stringify(nodes));
    var list = [];
    !function level () {
        for (var i=0;i<nodes.length;i++) {
            if(levelChildren(nodes,nodes[i])){
                list.push(nodes[i])
            }
        }
    }()
    function levelChildren (nodes,nodes_) {
        for (var i=0;i<nodes.length;i++) {
            if(nodes[i].id == nodes_.pid){
                if(!nodes[i].children){
                    nodes[i].children = [];
                }
                nodes[i].children.push(nodes_)
                return false;
            }
        }
        return true;
    }
    return list

}