Golang init function reports error

The init function in Go language is a special function that is automatically called when the program is executed. The init function is usually used for program initialization, such as database connection, loading configuration files, etc. when the program starts. to ensure the program runs properly.

But when using the init function, sometimes some errors will occur. Below we will analyze common init function errors and provide corresponding solutions.

1. syntax error: unexpected init

This error is usually caused by calling the init function outside the function, or using something in the init function that cannot be used in the function. statement.

Solution: The init function needs to be moved to the main function or another function to call.

2. multiple registrations for init functions

This error is usually caused by repeated registration of multiple init functions in the same package.

Solution: These repeatedly registered init functions need to be merged into one function.

3. undefined: xxx

This error is usually caused by a variable or function not being declared or defined in the program, causing the compiler to not recognize it.

Solution: The corresponding variables or functions need to be declared or defined in the program.

4. panic: runtime error: invalid memory address or nil pointer dereference

This error is usually caused by not judging the null pointer in the calling function.

Solution: Before calling the function, you need to check whether the pointer is empty.

5. too many arguments to init

This error is usually caused by incorrect init function signature.

Solution: The parameter list of the init function needs to be corrected to the correct form.

In addition to the errors listed above, there are some other errors, such as: unknown identifier, declaration of initialized variables not allowed, type mismatch, etc. Usually, these errors can be avoided by correcting the code.

In general, the init function in the Go language is a very important function. When using the init function, you need to pay attention to various details and problems in the code to ensure that the program can run normally.

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