Course Intermediate  11267

Course Introduction："Self-study IT Network Linux Load Balancing Video Tutorial" mainly implements Linux load balancing by performing script operations on web, lvs and Linux under nagin.

Course Advanced  17593

Course Introduction："Shangxuetang MySQL Video Tutorial" introduces you to the process from installing to using the MySQL database, and introduces the specific operations of each link in detail.

Course Advanced  11305

Course Introduction："Brothers Band Front-end Example Display Video Tutorial" introduces examples of HTML5 and CSS3 technologies to everyone, so that everyone can become more proficient in using HTML5 and CSS3.

Course Introduction：Java divides memory into two types: one is stack memory and the other is heap memory. Some basic types of variables and object reference variables defined in the function are allocated in the stack memory of the function. When a variable is defined in a block of code, Java allocates memory space for the variable in the stack. When the variable exceeds After the scope (for example, call function B in function A, define variable a in function B, the scope of variable a is only function B, after function B runs, variable a will be automatically destroyed. The memory allocated to it will be recycled), Java will automatically release the allocated...

2017-06-15 comment 0  2117

Course Introduction：Comparison of memory management in C++ and other languages ​​Introduction Memory management is a crucial aspect of programming, which affects the performance and reliability of the program. The C++ language provides high-level control over memory management, which is very different from the memory management methods of other languages. Stack memory and heap memory In C++, memory is divided into two main areas: stack and heap. The stack dynamically allocates memory during function calls and is used to store local variables and other short-term data. The heap is an area used to dynamically allocate memory at runtime. Memory management in other languages ​​Python, Java and other languages ​​use automatic garbage collection mechanisms. This means that programmers do not need to manually manage memory allocation and deallocation. The garbage collector periodically checks memory at runtime and reclaims objects that are no longer used.

2024-06-01 comment 0  859

Course Introduction：Memory can be allocated in two ways: Static memory allocation Static variables are defined in an allocated block of space with a fixed size. Once allocated, it cannot be released. Memory is allocated for declared variables in the program. You can use the "&" operator to get the address and assign it to the pointer. Memory is allocated at compile time. It uses the stack to maintain static allocation of memory. In this kind of allocation, once the memory is allocated, the memory size cannot be changed. Less efficient. The final size of the variable is determined before the program is run, this is called static memory allocation. Also known as compile-time memory allocation. We cannot change the size of variables allocated at compile time. Example 1 Static memory allocation is usually used for arrays. Let's do a sample program using an array as an example: Demonstration #include&l

2023-09-14 comment 0  1036

Course Introduction：The difference between heap and stack: 1. The memory allocation method is different. The heap is manually allocated and released by the programmer, while the stack is automatically allocated and released by the operating system. 2. The size is different. The size of the stack is fixed, while the stack is automatically allocated and released by the operating system. The size of is growing dynamically; 3. Data access methods are different. In the heap, data access is achieved through pointers, while in the stack, data access is achieved through variable names; 4. Data life cycle , In the heap, the life cycle of data can be very long, while in the stack, the life cycle of variables is determined by the scope in which they are located.

2023-07-18 comment 0  6596

Course Introduction：In Java, every interface, class, object, variable, and method of a running program is stored in a different location in the computer's memory. The heap is the part of the memory area where the values ​​of variables, methods, and classes are stored at runtime. Its allocation occurs dynamically and can grow or shrink based on the needs of the application. On the other hand, the names of reference variables, methods and classes are stored in the stack memory area. However, if their allocation is not handled correctly for some reason, it can lead to memory errors that we will discuss in this article. Stack related errors Whenever a process starts, it automatically defines a fixed stack size. During each method call, a call frame is created on the call stack and lasts until the method call ends. When the heap of computer memory

2023-09-01 comment 0  1246