[Compilation and Sharing] Some Golang error-prone questions

Golang is an increasingly popular programming language that has been widely used in many fields due to its excellent performance and concise syntax. However, in the process of learning Golang, you will inevitably encounter some error-prone questions. This article will introduce you to some Golang error-prone questions.

1. Reference types in Golang

In Golang, there are two types: value types and reference types. Value types include basic types (such as int, float, bool, etc.) and structures. When we copy a variable, what is copied is the value. Reference types include slices, maps, channels, interfaces, etc. When we copy a reference type variable, what is copied is the reference address, that is, the two variables point to the same memory address. This is an often confused concept in Golang and requires special attention.

2. Initialization of structure

Structure is one of the commonly used data types in Golang and is used to manage and store data. When defining a structure, we need to pay attention to the separator between the variable name and data type inside the structure. If we use a dash "-" to connect the variable name and data type when defining the structure, then when initializing the structure variable, we need to use a different separator (dot ".") to assign values, otherwise syntax will appear mistake.

3. Panic and recover in Golang

In Golang programs, we can use the panic and recover keywords to implement error processing and error information delivery. When an error occurs in the program, we can use the panic function to throw the error. In the call stack of the function, the program will not stop throwing exceptions until it encounters the recover function. The captured exception information can be obtained through the recover function. But it should be noted that if there is no recover function in the function, the entire program will crash directly. This is a common error-prone point.

4. Implementation of interface types

In Golang, interface is a very important concept. It allows us to do object-oriented programming and improve the readability and readability of the code. Maintainability. However, when using interfaces, you need to pay attention to the specific methods of implementing the interface. If we define an interface and implement the interface in other types, then these types must implement all methods in the interface, otherwise compilation errors will occur.

5. Locks in concurrent programming

Golang is a programming language that supports concurrent programming and supports concurrent programming through goroutine and channel. In concurrent programming, we often need to use locks to protect shared resources and avoid data competition problems. In Golang, there are three common locks: sync.Mutex, sync.RWMutex and sync.WaitGroup. When using these locks, if used improperly, deadlocks and other problems may occur, so special attention is required.

In general, the above are some common error-prone points in Golang, which require special attention when we learn and use Golang. Only by deeply understanding these issues and handling them correctly can we write efficient and stable Golang programs.

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