new-operator

问题 What do I want to create – I want to be alerted when all three of the following time frames have both indicators outside of certain parameters at the same time. (all above or all below) 4 HR 1HR 15MIN RSI (13,close) High value 70.00 Low Value 30.00 Full Stoch (33,22,11) High Value 80.00 and Low Value 20.00 Alert when 4HR FS and RSI outside of channels -(all above or all below) 1HR FS and RSI outside of channels -(all above or all below) 15min FS and RSI outside of channels -(all above or all

问题 I have to create a 2-Dimensional array of char pointers. The array will store a list of names and surnames - row 0 will hold names and row 1 will hold surnames. This is the code I have written so far (this file is included in the main file): #include "myFunction.h" #include <iostream> #include <string.h> using namespace std; char ***persons; void createArray(int n) { *persons = new char * int[n]; for(int i=0; i<n; i++) *persons[i]=new char[n]; } and main calls this function with: createArray

问题 So given this c structure: typedef struct { int* arr1; int* arr2; } myStruct; This answer described using a single malloc to allocate a myStruct and it's arrays at the same time: myStruct* p = malloc(sizeof(*p) + 10 * sizeof(*p->arr1) + 10 * num * sizeof(*p->arr2); if(p != NULL) { p->arr1 = (int*)(p + 1); p->arr2 = p->arr1 + 10; } What I'd like to know is there a similar way to do this with new ? Obviously I want to be able to allocate to a size that I receive at runtime as is done with the C

问题 This question already has answers here : Can constructor return a null object? (9 answers) Closed 3 years ago . Is it possible for the following line to return null? MyClass obj = new MyClass(); If so, what conditions would cause a return value of null? 回答1: It's impossible for new to return null, assuming the VM is functioning correctly. From section 15.9.4 of the Java Language Specification: The value of a class instance creation expression is a reference to the newly created object of the

问题 This question already has answers here : How to fix JSLint “missing new” error (2 answers) Closed 6 years ago . Let's say I have some JavaScript that looks like this: function A() { var MyVar, SomeParameter; // do work MyVar = FunctionB(SomeParameter); } JsLint says I'm Missing 'new'. at the line MyVar = FunctionB(SomeParameter); Why should I rewrite as MyVar = new FunctionB(SomeParameter); Is there going to be any benefit? 回答1: It is the convention that constructors (eg: Array , Object ) are

问题 In the code below I receive the compile error Error Too many arguments to 'Public Sub New()' on the Dim TestChild As ChildClass = New ChildClass("c") . I do not receive it on TestChild.Method1() even though they are both on the base class I am inheriting from. Public Class BaseClass Public ReadOnly Text As String Public Sub New(ByVal SetText As String) Text = SetText End Sub Public Sub New() Text = "" End Sub End Class Public Class ChildClass Inherits BaseClass End Class Public Class

问题 I reviewed the answers provided to the "GUI Programming APIs" post and wondering if these answers still apply. https://stackoverflow.com/questions/610/gui-programming-apis Specifically from that thread it appears that QT is the one that was most referenced with wxWidgets and Shoes a close second and third. I just wanted to make sure that a definitive winner has not emerged in the past 6 months since that question was posted. I am constrained to target OpenSource and Freeware solutions, so I

问题 This question already has answers here : Closed 10 years ago . Duplicate of: In what cases do I use malloc vs new? Just re-reading this question: What is the difference between "new" and "malloc" and "calloc" in C++? I checked the answers but nobody answered the question: When would I use malloc instead of new? There are a couple of reasons (I can think of two). Let the best float to the top. 回答1: A couple that spring to mind: When you need code to be portable between C++ and C. When you are

问题 I wrote; Element element=new Element; I got error; homework.cpp: In function 'int main(int, char**)': homework.cpp:227:29: error: conversion from 'Element*' to non-scalar type 'Element' requested *** 1 errors, 0 warnings I do not want a pointer or array of elements, Altough should i write Element *element= new Element; . SOmebody to explain? EDIT: Element class: class Element{ public: Element():exists(false){}; std::string name; std::string full_path_name; ElementType element_type; long

问题 I'm writing a database interface in Google Go. It takes encoding.BinaryMarshaler objects to save and saves them as []byte slices, and it loads data into encoding.BinaryUnmarshaler to return it: func (db *DB) Get(bucket []byte, key []byte, destination encoding.BinaryUnmarshaler) (encoding.BinaryUnmarshaler, error) { I want to implement being able to load an arbitrary length slice of encoding.BinaryUnmarshaler s in one go (for example "load all data from a bucket X"). I want the function to be