ABI compatibility in C refers to whether binary code generated by different compilers or versions can be compatible without recompilation. 1. Function calling conventions, 2. Name modification, 3. Virtual function table layout, 4. Structure and class layout are the main aspects involved.

[Common Directory Description] Directory/bin stores binary executable files (ls, cat, mkdir, etc.), and common commands are generally here. /etc stores system management and configuration files/home stores all user files. The root directory of the user's home directory is the basis of the user's home directory. For example, the home directory of the user user is /home/user. You can use ~user to represent /usr to store system applications. The more important directory /usr/local Local system administrator software installation directory (install system-level applications). This is the largest directory, and almost all the applications and files to be used are in this directory. /usr/x11r6?Directory for storing x?window/usr/bin?Many

The easiest way to calculate list length in Python is to use the len() function. 1) The len() function is suitable for lists, strings, tuples, dictionaries, etc., and returns the number of elements. 2) Although custom length calculation function is feasible, it is inefficient and is not recommended to use it in practical applications. 3) When processing large data sets, you can first calculate the length to avoid repeated calculations and improve performance. Using the len() function is simple, fast and reliable, and is the best practice for calculating list lengths.

u is used in C language to declare unsigned integer constants. 1. The u suffix represents an unsigned integer, such as 10u. 2. The range of unsigned integers starts from 0 and does not contain negative numbers. They are suitable for large-range positive numbers and bit operations. 3. Pay attention to overflow and negative number processing issues when using unsigned integers.

Classes in Java inherit from Object class by default unless they are explicitly inherited. 1. The Java class is directly or indirectly inherited from the Object class. 2. Class inheritance is implemented through the extends keyword, and the interface is implemented through the implements keyword. 3. The subclass constructor calls the parent class constructor first, and pay attention to the call order. 4. Java does not support multiple inheritance, but similar effects can be achieved through interfaces. 5. Combination should be used as much as possible instead of inheritance, keep the inheritance level simple and reduce the degree of class coupling.

The syntax of the trigonometric operator in C is condition?expression1:expression2, which is used to select and execute different expressions according to the condition. 1) Basic usage example: intmax=(x>y)?x:y, used to select the larger value in x and y. 2) Example of nested usage: intresult=(a>0&&b>0)?a b:(a==0||b==0)?a*b:a-b, used to perform different operations according to different conditions. 3) Error handling example: std::stringerrorMessage=(errorCode==0)?"Successful&quo

In C, the operator "less than or equal to" is

Handling Git commit conflicts in VSCode can be effectively resolved through the following steps: 1. Identify the conflicting file, and VSCode will be highlighted in red. 2. Manually edit the code between conflict marks and decide to retain, delete or merge. 3. Keep branches small and focused to reduce conflicts. 4. Use GitLens extension to understand code history. 5. Use VSCode to build-in Git commands, such as gitmerge--abort or gitreset--hard. 6. Avoid relying on automatic merge tools and carefully check the merge results. 7. Delete all conflict marks to avoid compilation errors. With these methods and tricks, you can handle Git conflicts efficiently in VSCode.