ref

问题 I'm trying to create an integrated athletic planning and training calendar. Part of this is for one sheet to identify weeks in which races occur based upon races and dates identified by the user on another sheet. I've confirmed that my VLOOKUP is not referencing a non-existent column and that the cell style is General for those applicable. Here is the formula: =VLOOKUP(Periods!A6,Races!$F$2:$F$20,2,FALSE) The Lookup Value is the Training week on the first image and is used to identify races

问题 I have written a struct and functions where I try to pass the struct by reference (i.e. struct value can be modified inside functions). enum RoomType { Economy, Buisness, Executive, Deluxe }; struct HotelRoom { public int Number; public bool Taken; public RoomType Category; public void Print() { String status = Taken ? "Occupied" : "available"; Console.WriteLine("Room {0} is of {1} class and is currently {2}", Number, Category, status); } } Now to pass this struct by reference I've found two

问题 As suggested in this issue, this is how refs are suggested to use in case I want to ref a child component. findDOMNode(childComponentStringRef) class Field extends Component { componentDidMount() { // this.inputNode.focus(); // Basically I want to access the ref to input here as well } render() { return ( <input type='text' ref={this.props.inputRef} /> ) } } class MyComponent extends Component { componentDidMount() { this.inputNode.focus(); } render() { return ( <div> Hello, <Field inputRef=

问题 I've got a private ref count inside the class SharedObject. SharedObject is a base class for other classes, for example Window. Window is the base class of Editor. When the ref count reaches 0, because of calling SharedObject::Release(), the SharedObject deletes itself. First we get to the Editor destructor, which shows that the this pointer contains m_refs == 0, but when we get to the Window destructor it is suddenly 1, and when we reach the SharedObject destructor, it is still 1. I put a

问题 i have multiple dataset that is using on multiple form . so i make the dataset as public and store this on my Mdiparent form . when i open any form i use this call the dataset on child form and bind that dataset with my combobox . There are 20 dataset that are using on the form . So due to this load time take near about 30 - 35 seconds . So i want to use that dataset as ref . How can i do this . Below the code that i am using right now On Form Parent public DataSet dszip = null; dszip =

问题 I have a std::list of classes and want to remove entries that are marked for delete. I am using std::remove_if and erase. class MyClass { bool isDone(MyData& myData) { return myData.isDone(); } void removeIfDone(std::list<MyData>& myList) { std::list<MyData>::iterator it = remove_if(myList.begin(), myList.end(), boost::bind(&MyClass::isDone, this, _1)); myList.erase(it, myList.end()); } }; I am running on a small processor for which memory allocation and deallocation is very expensive. This

问题 I've this question about pass some instances by ref or not: here is my problem: Case 1: simple var like int : private void button2_Click(object sender, EventArgs e) { int nTest = 10; testInt(nTest); MessageBox.Show(nTest.ToString()); // this message show me 10 testIntRef(ref nTest); MessageBox.Show(nTest.ToString()); // this message show me 11 } private void testInt(int nn) { nn++; } private void testIntRef(ref int nn) { nn++; } this is exactly what I think, if I use the ref, the parameter is

问题 Documentation says that make_ref() -> ref() Returns an almost unique reference. The returned reference will re-occur after approximately 2 82 calls; therefore it is unique enough for practical purposes. But my eyes tell me that between VM restarts I could easily get the same ref: [~] erl Erlang R14B04 (erts-5.8.5) 1> make_ref(). #Ref<0.0.0.33> 2> make_ref(). #Ref<0.0.0.37> ^C [~] erl Erlang R14B04 (erts-5.8.5) 1> make_ref(). #Ref<0.0.0.33> So, how unique Erlang’s Refs are? Are they suitable

问题 I am new to React.js and just now i was learning the concept of ref in React. They have new createRef API in V16.3. I was trying to learn this from REACT DOC's like this - import React from "react"; export class MyComponent extends React.Component { constructor(props) { super(props); // create a ref to store the textInput DOM element this.textInput = React.createRef(); this.focusTextInput = this.focusTextInput.bind(this); } focusTextInput() { // Explicitly focus the text input using the raw

问题 Im working with some code that has a subroutine which includes an array reference as one of the parameters. The elements in this incoming array can be either small arrays or strings. I want to determine what type each element is in order to do something specific (i.e. if the element is an array, drill into it further via indexing, if the element is a string, use the string) I have tried using the ref function to interrogate each array element. It seems to work for elements that are ARRAYs,