Golang Slice and Array differences

This is a creation in Article, where the information may have evolved or changed.

Array type

is a fixed-length array that must be determined before using the array length array

golangarrayFeatures:

• golangThe array in is 值类型 , that is, if you assign an array to another array, then the entire array is actually copied a copy of the
• If golang the array in the function is an argument, the actual passed argument is a copy of the array, not the pointer to the array
• arrayis also part of the length, which means it Type [10]int [20]int is not the same.

sliceType

• sliceis a reference type and is a dynamic pointer to an array slice.
• sliceis a variable-length data structure that always points to the underlying array array .

1. Create Slice

动态数组创建，类似创建数组，但是没有指定固定长度var al []int     //创建slicesl := make([]int,10)  //创建有10个元素的slicesl:=[]int{1,2,3} //创建有初始化元素的slice

2. Create the array first, and set up the slice based on the array slice

var arr =[10]{1,2,3，4,5。6}  sl := arr[2:5] //创建有3个元素的slice

3.slice has some easy-to-operate

 - `slice`的默认开始位置是0，`ar[:n]`等价于`ar[0:n]` - `slice`的第二个序列默认是数组的长度，`ar[n:]`等价于`ar[n:len(ar)]`

The difference between an array and a slice

• When declaring an array, the length of the array is indicated in square brackets or ..., when the slice is declared, the square brackets are empty
• As a function parameter, the array passes a copy of the array, and slice passes the pointer.