golang slice 切片数组下标的截取方式

需求

使用golang截取的下标，按照下标顺序截取

代码

// You can edit this code!
// Click here and start typing.
package main

import "fmt"

func Rows(page, pageSize int) (items []int) {
	alls := []int{1, 2, 3, 4, 5, 6, 7, 8, 9}
	var (
		offset int
		end    int
	)
	if page <= 1 {
		page = 1
	}
	if pageSize <= 1 {
		pageSize = 3
	}

	offset = (page - 1) * pageSize
	end = offset + pageSize
	if end > len(alls) {
		end = len(alls)
	}
	if offset < end {
		items = alls[offset:end]
	}

	fmt.Println("page,pagesize = ", page, pageSize)
	fmt.Println("offset,end = ", offset, end)
	return
}

func main() {
	fmt.Println(Rows(3, 4))
}