我有以下功能
static void p (){
}
我想将指向 p 的函数指针传递给函数 x。
void x(void * ptr){
}
我正在尝试以下操作，但它不起作用。
...
x(ptr);
注意 x 和 p 属于不同的类。我收到以下编译错误。
invalid conversion from 'void (*)()' to 'void*' [-fpermissive]
我有以下方法
private void initializeMoveOnClick(final Group window){
window.addEventFilter(MouseEvent.MOUSE_CLICKED, new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent mouseEvent) {
//do some stuff
}
});
}
如何用lambda表达式替换覆盖的句柄方法声明？
我可以运行 curl 将文件上传到 elasticsearch curl -XPUT localhost:9200/_bulk --data-binary @other2.json
文件的内容是
{"index":{"_index":"movies","_type":"movie","_id":1}}\n
{"title": "Movie1","director": "director1","year":1962}\n
{"index":{"_index":"movies","_type":"movie","_id":2}}\n
{"title": "Movie2","director": "director2","year": 1972}\n
{"index":{"_index":"movies","_type":"movie","_id":3}}\n
{"title": "Movie3","director": "director3","year": 1972}\n
最后换一行。
但是我无法使用 apache http 客户端发布相同的文件
public static void main(String[] args) throws Exception {
JsonResponse http = new JsonResponse();
System.out.println("\nTesting 2 - Send Http POST request");
http.sendFile();
}
private void sendFile() throws Exception{
String fileName = "C:\\other2.json";
File jsonFile = new File(fileName);
HttpEntity entity = MultipartEntityBuilder.create()
.addBinaryBody("file", jsonFile,org.apache.http.entity.ContentType.APPLICATION_JSON, jsonFile.getName())
.build();
HttpPost post = new HttpPost("http://localhost:9200/_bulk");
post.setEntity(entity);
HttpClientBuilder …我有以下内容
std::vector<Cube> well = vector<Cube>();
createCube(well, x, y, z, id);
后来我尝试将Cube插入到这样的矢量中,
void Viewer::createCube(std::vector<Cube> vec, int x, int y, int z, int id) {
float rgb[] = {0.0f, 0.0f, 1.0f};
vec.push_back(Cube(QMatrix4x4(), -1));
int loc = vec.size() - 1;
std::cout << "loc:" << loc << std::endl;
vec.at(vec.size() - 1).matrix.translate(x,y,z);
}
我得到输出loc = 0.
为什么它不是我的Vector的新Cube？