golang 切片扩容实验

 slice底层是指针，array是固定数组,某些场合需要动态数组 slice组成ptr len cap package main import ( "fmt" ) func main() { aSlice := []int{1, 2, 3, 4, 5} fmt.Printf("aSlice length = %d, cap = %d, self = %v\n", len(aSlice), cap(aSlice), aSlice) aSlice = append(aSlice, 6) fmt.Printf("aSlice length= %d, cap = %d, self = %v\n", len(aSlice), cap(aSlice), aSlice) aSlice = append(aSlice, 7) fmt.Printf("aSlice length= %d, cap = %d, self = %v\n", len(aSlice), cap(aSlice), aSlice) aSlice = append(aSlice, 7) fmt.Printf("aSlice length= %d, cap = %d, self = %v\n", len(aSlice), cap(aSlice), aSlice) aSlice = append(aSlice, 7) fmt.Printf("aSlice length= %d, cap = %d, self = %v\n", len(aSlice), cap(aSlice), aSlice) aSlice = append(aSlice, 7) fmt.Printf("aSlice length= %d, cap = %d, self = %v\n", len(aSlice), cap(aSlice), aSlice) aSlice = append(aSlice, 8) fmt.Printf("aSlice length= %d, cap = %d, self = %v\n", len(aSlice), cap(aSlice), aSlice) fmt.Printf("aSlice length= %d, cap = %d, self = %v\n", len(aSlice), cap(aSlice), aSlice) fmt.Printf("aSlice length= %d, cap = %d, self = %v\n", len(aSlice), cap(aSlice), aSlice) }  超过len值会动态去扩容 没有用到Markdown语法 好人一生平安! 下次！