go中new和make的区别？

In Go, new and make are both built-in functions that are used to allocate memory, but they work slightly differently.

new is a function that takes a type as an argument, allocates memory to fit a value of that type, and returns a pointer to the allocated memory. This memory is zeroed, meaning that all of its bits are set to zero.

Here's an example of how you might use new:

// Create a pointer to a new int
intPtr := new(int)

// Use the pointer to set the value at that memory address
*intPtr = 123

// The value of the original variable is now changed
fmt.Println(*intPtr)  // 123

make, on the other hand, is a function that is used to create and initialize a new value of a specific type, such as a slice, map, or channel. Unlike new, make doesn't take a type as an argument; it's a special built-in function that is specific to certain types.

Here's an example of how you might use make to create a new slice:

// Create a new slice with make
slice := make([]int, 5)

// Set the values in the slice
slice[0] = 1
slice[1] = 2
slice[2] = 3

// The slice now has a length of 5 and a capacity of 5
fmt.Println(len(slice))  // 5
fmt.Println(cap(slice))  // 5

In short, new is used to allocate memory for a new value, while make is used to initialize and create a new value of a specific type.