class

问题 I'm used the material-UI to develop the react.js frontend. But when I'm gonna develop it furthermore(to implement the crud operations), it's hard to code, since every tutorial coded by using class , not a function . So, I tried to convert the code into the class. But I failed to do that properly. So I just ask you guys to help me to convert the below code into the class. I would like to appreciate your kindness. Thank you. import React from "react"; import ReactDom from 'react-dom'; import

问题 I'm used the material-UI to develop the react.js frontend. But when I'm gonna develop it furthermore(to implement the crud operations), it's hard to code, since every tutorial coded by using class , not a function . So, I tried to convert the code into the class. But I failed to do that properly. So I just ask you guys to help me to convert the below code into the class. I would like to appreciate your kindness. Thank you. import React from "react"; import ReactDom from 'react-dom'; import

问题 I'm trying to determine the best way to define a function within a class that reads a specific .csv file if a criterion is met. Then, the function returns the data in the file. But I need it to return the data in a way that allows me to call on those data again in a future function in the class. Some background: The data I'm reading in are time-stamped temperatures. The columns in each .csv file are 'day', 'hour', 'temp_1', 'temp_2', 'temp_3', 'temp_4' Then, there are rows of numeric data for

问题 I'm trying to import a method from a python module but getting it's throwing an error mentioned below. cannot import name 'methodname' from 'modulename' my directory structure: there are solutions to this problem but those are already satisfied in my case. Below is how I tried to import the method from the module. from text_preprocessing import TextToTensor, clean_text here TextToTensor is aclass name and clean_text is a method in TextToTensor class. of Course, I can create an instance of

问题 I have an object called "operator" in C# with a method that takes two number inputs from a user and adds them together. However, I want to make the second parameter (2nd input) optional so that the default is "4" if the user doesn't enter a second number. I know something's wrong because it just ends the program rather than using the default if the user enters just one number and hits enter when prompted for second input. This solution is probably very obvious but it's eluding me. I'd

问题 I have a functional code running 2 procedures and display 2 windows separately. each procedure generates its own window. I would like to choose the procedure to be displayed or have both in a main window. the 2 options are of interest. I tried to define a window where i could call each items but since the generation of the individual windows (Mainwindow_1 and 2) belong to a class already defining a window i don't know how to proceed to display only one window at a time upon clicking the

问题 can anyone explain what does the macro term in front of the following class declaration do (the term OPENRTI_LOCAL in the following code) do? Please ignore the context of the following example. I am looking for a general explanation of the following type of cpp class declaration. namespace OpenRTI { class OPENRTI_LOCAL RTI1516ETestAmbassador : public RTITest::Ambassador, public rti1516e::FederateAmbassador { ...... } } 回答1: Checking OpenRTI's source code, it looks like it is simply indicating

问题 can anyone explain what does the macro term in front of the following class declaration do (the term OPENRTI_LOCAL in the following code) do? Please ignore the context of the following example. I am looking for a general explanation of the following type of cpp class declaration. namespace OpenRTI { class OPENRTI_LOCAL RTI1516ETestAmbassador : public RTITest::Ambassador, public rti1516e::FederateAmbassador { ...... } } 回答1: Checking OpenRTI's source code, it looks like it is simply indicating

问题 How may I correct the following code in C++11: const char *what() const noexcept override { return "Mtm matrix error: Dimension mismatch: (" + std::to_string(mat1_height) + "," + std::to_string(mat1_width) + ") (" + std::to_string(mat2_height) + "," + std::to_string(mat2_width) + ")"; } As you can see I'm returning string instead of const char* but won't that be converrted automatically? and how to fix that? Note: I want something to look like c++ code and not c using sprintf for example 回答1:

问题 I have created the following click count factory for adding the click count to the event information already present in a regular click event. This function creates a clickCountObj to track the number of clicks, as well as a new function for catching a click event on the given element parameter and reporting it back to the listener parameter along with the click count. Originally, I wanted to do this as a class, rather than a factory... Way back when I was working in Java, I would have done