1 前言
切片是动态数组,数组数组是按值赋值,切片是按地址赋值(引用)
2 代码
2.1 数组初始化
func basic_array(){
//var arr2 = [3]int{2,4,6} // 1 //arr2 := [3]int{2,4,6} //2 //var arr2[3]int = [3]int{2,4,6} //3 //var arr2 [3]int //4
//arr2=[3]int{1,3,5} // var arr2 [3]int //5
// var i int
// for i=0;i<len(arr2);i++{
// arr2[i] = 10+i;
// } // var arr2 [3]int //6
// var arr2 [...]int{1,3,7} //7[...]表示根据元素自适应大小 for i,e := range arr2{
fmt.Println("arr2[",i,"]->",e);
}
}
2.2 切片初始化
func basic_slice(){ //var arr2 = []int{2,4,6} // 1 //arr2 := []int{2,4,6} //2 //var arr2[]int = [3]int{2,4,6} //3 //var arr2 []int //4
//arr2=[]int{1,3,5} //var slice1 []type = make([]type, len) //5
//slice1 := make([]type, len) //6
//also add parameter capacity
//make([]T, length, capacity) //7,8 for i,e := range arr2{
fmt.Println("arr2[",i,"]->",e);
} }
3 数组与切片区别
var arr2[3]int = [3]int{2,4,6}
var arr1 = arr2
arr1[1]=11 for i,e := range arr1{
fmt.Println("arr1[",i,"]->",e);
} for i,e := range arr2{
fmt.Println("arr2[",i,"]->",e);
} //result
// arr1[ 0 ]-> 2
// arr1[ 1 ]-> 11
// arr1[ 2 ]-> 6
// arr2[ 0 ]-> 2
// arr2[ 1 ]-> 4
// arr2[ 2 ]-> 6 //slice
var arr2[]int = []int{2,4,6}
var arr1 = arr2
arr1[1]=11 for i,e := range arr1{
fmt.Println("arr1[",i,"]->",e);
} for i,e := range arr2{
fmt.Println("arr2[",i,"]->",e);
} //result
// arr1[ 0 ]-> 2
// arr1[ 1 ]-> 11
// arr1[ 2 ]-> 6
// arr2[ 0 ]-> 2
// arr2[ 1 ]-> 11
// arr2[ 2 ]-> 6