Shulou(Shulou.com)05/31 Report--

This article mainly introduces the relevant knowledge of "how to use make and new of go language". The editor shows you the operation process through an actual case. The operation method is simple, fast and practical. I hope this article "how to use make and new of go language" can help you solve the problem.

Make and new are the key words that are often used when initializing a structure in golang, but these two keywords often confuse us. Because they can initialize different structures.

The function of make and newmake is to initialize built-in data structures, such as slice (slicing), hash table, and Channelnew, to allocate a piece of memory space based on the type passed in and return a pointer to that memory space

For example:

/ / A slice with element int is created, and the header pointer of slice is returned

Slice: = make ([] int, 0100)

/ / create a map whose key is int,value and Boolean, and return the structure pointer

M: = make (map [int] bool, 10)

/ / A pipe whose element is int is created and a pointer to the structure is returned.

Ch: = make (chan int, 5)

New, on the other hand, is much simpler than the complex make keyword. It can only take a type as a parameter and return a pointer to that type.

For example:

I: = new (int)

/ / is completely equivalent to new and returns pointers.

Var v int

I: = & v

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