Brief material on C++ object-lifetime management and on passing and returning values/references [closed]
Closed 9 years ago.
Why are references rarely used in PHP?
I have some C++ knowledge and know that pointers are commonly used there, but I’ve started to look at PHP open source code and I never see code using references in methods.
How to test functions or the code inside $(document).ready() using Jasmine?
I have multiple functions and a lot of code inside $(document).ready(function()). I am using jasmine to test the functions inside the ready function as well as the code inside ready() but when the test cases inside describe are executed it is not able to access the code inside the ready function.
How to test functions or the code inside $(document).ready() using Jasmine?
I have multiple functions and a lot of code inside $(document).ready(function()). I am using jasmine to test the functions inside the ready function as well as the code inside ready() but when the test cases inside describe are executed it is not able to access the code inside the ready function.
Why do you need to use pass by reference in C++ to change the value of the arguments inside the function?
I’m new to coding and am currently trying to learn C++ myself. I just learned about function parameters and pass by value vs pass by reference. Everywhere I read, they say that one of the reasons pass by reference is useful is because it allows you to change the value of an argument inside the function. But why does making the parameter variable a reference let you do that? And why can’t you do that if you pass a value instead?
Codigo VBA para agregar Referencias a proyecto Microsoft Access 2016
Tengo un proyecto en Microsoft Access, me corre en mi máquina, pero en otras no corre por falta de referencias activadas, por ejemplo para enviar un correo electrónico, en mi computadora lo hace sin problemas, pero en otra computadora se cae por falta de referencia de Microsoft Outlook 16.0 Object Library ¿Hay alguna manera de registrar o activar estas referencias por medio de código VBA u otra forma para que no haya problema en otras máquinas? Gracias con antelación.
Why do C++ and Java both use the notion of “reference” but not in the same sense?
In C++ a reference argument to a function allows the function to make the reference refer to something else:
Why are pointers to literals not possible?
Reference to a literal is possible only if the reference is declared as constant.
How to convey lifetime requirements?
Usually I use std::unique_ptr to convey ownership and pass in raw pointers as parameters when no ownership is implied. However, I almost never consider a nullptr to be acceptable as an argument, so it would be nice to use references to avoid this, but I’m not sure most people would expect that the object the parameter references needs to exist for the lifetime of the struct A without looking at the source code.
How to convey lifetime requirements?
Usually I use std::unique_ptr to convey ownership and pass in raw pointers as parameters when no ownership is implied. However, I almost never consider a nullptr to be acceptable as an argument, so it would be nice to use references to avoid this, but I’m not sure most people would expect that the object the parameter references needs to exist for the lifetime of the struct A without looking at the source code.