英文:
Golang interface on type
问题
我是你的中文翻译助手，以下是你提供的代码的翻译：
package main
import "fmt"
type Sequence []float64
type Stats interface {
greaterThan(x float64) Sequence
}
func (s Sequence) greaterThan(x float64) Sequence {
var v Sequence
for _, num := range s {
if num > x {
v = append(v, num)
}
}
return v
}
func display(s Sequence) {
fmt.Println("s.greaterThan(2):", s.greaterThan(2))
}
func main() {
s := Sequence([]float64{1, 2, 3, -1, 6, 3, 2, 1, 0})
display(s)
}
这是修复后的代码，它定义了一个名为Sequence的类型和一个名为Stats的接口。greaterThan方法接收一个float64参数，并返回一个新的Sequence，其中移除了所有小于等于该参数的数字。在修复后的代码中，我们使用了一个循环来遍历原始的Sequence，并将大于给定参数的数字添加到新的Sequence中。最后，我们在main函数中创建了一个Sequence对象并调用display函数来展示结果。
关于你的问题，你不需要使用map来删除结构类型中的元素。你可以使用切片来存储和操作Sequence类型的数据。在修复后的代码中，我们使用了切片来存储新的Sequence，并使用append函数将符合条件的数字添加到切片中。
希望这可以帮助到你！如果你有任何其他问题，请随时问我。
英文:
I am new to GO and I am using golang to write a simple type interface.
The type is defined as:
type Sequence []float64
and the interface is:
type Stats interface {
greaterThan(x float64) Sequence
}
The function greaterThan(x float64) should return a new Sequence that is the same as the numbers in the object
// except all numbers less than, or equal to, x have been removed.
Here is my try, but it will not compile. I don't know how to fix it.
My question is : how can I delete an item from structure type? Should I use a map? (as my try)
package main
import "fmt"
type Sequence []float64
type Stats interface {
greaterThan(x float64) Sequence
}
func (s Sequence) greaterThan(x float64) Sequence{
var i int
var f float64
set := make(map[float64]int)
var v = f[i] Sequence
for i, f := range set{
for j := 0; j <= len(s); j++ {
if s[j] <= x {
delete(set, s[j])
}
}
}
return v
}
func display(s Sequence) {
fmt.Println("s.greaterThan(2):", s.greaterThan(2))
}
func main() {
s := Sequence([]float64{1, 2, 3, -1, 6, 3, 2, 1, 0})
display(s)
}
答案1
得分: 4
我会这样做：
package main
import "fmt"
type Sequence []float64
type Stats interface {
greaterThan(x float64) Sequence
}
func (s Sequence) greaterThan(x float64) (ans Sequence) {
for _, v := range s {
if v > x {
ans = append(ans, v)
}
}
return ans
}
func main() {
s := Sequence{1, 2, 3, -1, 6, 3, 2, 1, 0}
fmt.Printf("%v\n", s.greaterThan(2))
}
请参考：http://play.golang.org/p/qXi5uE-25v
最可能的情况是，你不应该从切片中删除项目，而是构建一个只包含所需项目的新切片。
只是出于好奇：你想用接口Stats做什么？
英文:
I'd do it like this:
package main
import "fmt"
type Sequence []float64
type Stats interface {
greaterThan(x float64) Sequence
}
func (s Sequence) greaterThan(x float64) (ans Sequence) {
for _, v := range s {
if v > x {
ans = append(ans, v)
}
}
return ans
}
func main() {
s := Sequence{1, 2, 3, -1, 6, 3, 2, 1, 0}
fmt.Printf("%v\n", s.greaterThan(2))
}
See http://play.golang.org/p/qXi5uE-25v
Most probably you should not delete items from the slice but construct a new one containing only the wanted ones.
Just out of curiosity: What do you want to do with the interface Stat?
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