What are the reference types in golang?

Reference types in Go are stored in the heap, including: 1. Slice: refer to some consecutive elements in the array; 2. Map: store key-value pairs; 3. Pointer: store the memory address pointing to another value ; 4. Interface: defines a collection of methods, which can be implemented in multiple types; 5. Channel: used for concurrent and safe transfer of values ​​between threads.

Reference type in Go

In Go language, reference type is a representation stored in the heap The type of data. When a variable refers to a value, it stores the address of the value, not the value itself.

Common reference types in Go include:

• Slice (slice): A type that refers to a part of an array.
• Map (map): The type of a collection of key-value pairs.
• Pointer (pointer): A type that points to another value.
• Interface (interface): A type that defines a collection of methods.
• Channel (channel): A type used for communication.

Slices

A slice contains references to consecutive elements in the underlying array. They are variable in size and can be easily sliced ​​from one to another.

Maps

Maps store key-value pairs, where the keys are typically immutable types (such as strings, integers, or bools). Each key maps to a value, which can be of any type.

Pointer

A pointer stores a memory address that points to another value (variable or constant). They are used to indirectly reference variables, which is useful for modifying the values ​​passed as function parameters.

Interface

Interface defines a set of methods rather than a specific data type. Any type can implement an interface as long as it implements all methods defined in the interface.

Channels

Channels allow values ​​to be passed between threads concurrently and safely. They are used to coordinate tasks in concurrent programming.

Summary

Reference types in Go refer to collections of data types stored in the heap. They include slices, maps, pointers, interfaces, and channels.

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