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C++ and finance, trouble understanding syntax in these files


C++ and finance, trouble understanding syntax in these files

By : nicola_alberts
Date : November 22 2020, 10:54 AM
To fix this issue I originally wasn't going to answer as there is a lot here for beginning c++ but I thought it might be beneficial to give you a highlevel overview and make you aware of the learning curve involved. I think you should slow things down and take a look at a book like Accelerated C++ http://www.amazon.com/Accelerated-C-Practical-Programming-Example/dp/020170353X which will cover all these things and have you understanding all this stuff in a matter of weeks. I have not done c++ programming for a while but will try to give a brief explanation of some basic points that you have not understood above:
The header files are used to help speed up compile time and also to organise your code. If everything was in a single file (and you could write all of the above in a single file if you wanted to), any change to that file would have to recompiled. By splitting things up, you get advantages of compile speed (in large projects) and separating the interface from the implementation. You can think of the header file as declaring what the cpp file is going to implement. For example, you can the that the init() method is declared in the header file and implemented in the .cpp file.
code :


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Trouble understanding foreach (x =>) syntax

Trouble understanding foreach (x =>) syntax


By : user3852163
Date : March 29 2020, 07:55 AM
Hope this helps First question is answered above, its just a lambda expression which carries code that needs to be executed on each iteration of foreach.
For the second question, if you are looking for the purpose of IsData property go inside the IsData method in that class(class in first code block).
Trouble in understanding this syntax

Trouble in understanding this syntax


By : Patrick Burris
Date : March 29 2020, 07:55 AM
wish help you to fix your issue You are basically creating a anonymous class instance and specifying an instance initializer. Think of it in terms of a normal class, e.g.:
code :
class Person {

  String age, name;

  List<String> hobbies;

  {
    hobbies = new ArrayList<String>();
  }

  public Person(String name, String age) {
    this.name = name;
    this.age = age;
  } 

}
Trouble understanding the C++11 syntax in the Rule of Zero

Trouble understanding the C++11 syntax in the Rule of Zero


By : Dan L
Date : March 29 2020, 07:55 AM
it fixes the issue
Why a curly bracket usage instead of parentheses to initialize handle?
Trouble understanding C++ pointer syntax

Trouble understanding C++ pointer syntax


By : user3115694
Date : March 29 2020, 07:55 AM
I hope this helps you . May be you could just break it down one at a time to understand the syntax better. First start up with a simple definition without the array notation
code :
int(*(*ptr)(char*));
int(*(*ptr[3])(char*))[2];
#include <iostream>

static int arr[2] = { 2, 2 };

// initialize  'bar' as a function that accepts char* and returns
// int(*)[2]
int (*bar(char * str))[2] {
    return &arr;
}

int main() {
    // pointer definition, not initialized yet
    int(*(*foo[3])(char*))[2];
    char ch = 'f';
    // as long as the signatures for the function pointer and 
    // bar matches, the assignment below shouldn't be a problem
    foo[0] = bar;
    // invoking the function by de-referencing the pointer at foo[0]
    // Use 'auto' for C++11 or declare ptr as int (*ptr)[2] 
    auto *ptr = (*foo[0])(&ch);
    return 0;
}
Trouble understanding a LIKE operator syntax

Trouble understanding a LIKE operator syntax


By : user3632028
Date : March 29 2020, 07:55 AM
will help you COALESCE takes second argument if first one is NULL.
So let me got through couple of possibilities:
code :
LIKE (COALESCE(ur.title, '') || ' ' || COALESCE(urd.reviewtext, '')) OR
LIKE '.* coronavirus .*|.* SARS .*' OR
LIKE 'si'
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