[What I was thinking when I was studying the source code of Cocos-2dx]-Ref class, all origins, cocos-2dx-ref[Glossary]Reference counting: reference counting is a concept frequently used in modern memory management. Its basic idea is to reference a
Ref and out
Today, my younger brother asked me about the difference between ref and out.In C #, ref and out are two special keywords. You can use them to pass parameters according to references.In general, we usually pass the value to the method.
Both ref and out are keywords in C #, and the functionality is similar to specifying that a parameter is passed by reference.For compiled programs, there is no difference between them, that is, they only have syntax differences.To sum up, they have
Parameter array Params:C # Allow you to specify one (only one) specific parameter for a function. This parameter must be the last parameter in the function definition. It is called a parameter.
Array. A parameter array can call a function with an
ref keyword causes an argument to be passed by reference, not by value.">The ref keyword passes arguments by reference, not by value. The effect of passing by reference is that any changes to the parameters in the called method are reflected in the
I had this problem when I was learning C #, but I didn't dig into it. Last night, when I thought about this problem, I tried to knock the code, and the result from the running, the more you see the more chaotic. On the basis of the review of some
[C #] Analysis of ref and out parameters,
The parameter passed by reference is a major feature of C # compared with many other languages. It is not easy to understand this concept in depth, then, the value type and reference type will become even
ref (C # Reference)
Visual Studio 2015Other versions
The REF keyword causes the parameter to be passed by reference, not by value. The effect passed by reference is that any changes to the parameters in the called method are reflected in the
Today, we will briefly summarize the usage of cursor in PL/SQL.
Cursor category:
-- Explicit cursor-- Static cursor |
| -- Implicit cursorCursor |-- Strong type (Restriction), specifying the return type-- Dynamic Cursor -- ref cursor |-- Weak type
The ref keyword allows the parameter to be passed by reference. The effect is that when the control is passed back to the call method, any changes to the parameters in the method will be reflected in this variable. To use the ref parameter, you must
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.