如何使用新版本的Node Nan Persistent

Question

对于 Nan 的新版本，下面的等效代码是什么： 以下代码适用于 0.12.* 但不适用于 4.3.0 及更高版本。

//1)  
//This is my object_
Persistent<Object> object_;

Local<Object> obj = Nan::New<Object>();
NanAssignPersistent(object_, obj); //Don't know what to replace with here


//2)
NanDisposePersistent(object_); //Don't know what to replace with here 

Answer 1

nan 文档显示了如何处理持久化对象 here. It may also be useful to look at the nan tests for Persistent。

示例：

Local<Object> obj;
Local<Object> obj2;

// Create a persistent
Nan::Persistent<v8::Object> persistent(obj);

// Get a local handle to the persisted object
v8::Local<v8::Object> orig_obj = Nan::New(persistent);

// Change the persistent reference
persistent.Reset(obj2);

// Dispose of the persistent
persistent.Reset();