[英]Compare a string against a struct field within a slice of structs (sort.Search golang)
type user struct {
name string
age int
}
data := []user{
{
name: "timothy",
age: 23,
},
{
name: "johnson",
age: 45,
},
{
name: "jason",
age: 44,
},
{
name: "handson",
age: 15,
},
{
name: "andrew",
age: 41,
},
}
fmt.Println(data)
val := "johnson"
found := false
i := sort.Search(len(data), func(i int) bool {
println(i)
return data[i].name == val
})
if i < len(data) && data[i].name == val {
found = true
}
fmt.Println(val, found)
我试图在包含一些字符串字段的结构数组中搜索一个字符串,但找不到匹配项,例如使用 johnson 或 andrew。 问题是什么? 谢谢!
这会将数据按顺序排序,然后对其进行搜索。
我必须声明一个用户类型,它是用户的一部分,然后为用户类型实现 Len/Cmp/Swap
sort.Search function 使用 >=
package main
import (
"fmt"
"sort"
)
type user struct {
name string
age int
}
type users []user
func (o users) Len() int { return len(o) }
func (o users) Less(i, j int) bool { return o[i].name < o[j].name }
func (o users) Swap(i, j int) { o[i], o[j] = o[j], o[i] }
func main() {
data := users{
{
name: "timothy",
age: 23,
},
{
name: "johnson",
age: 45,
},
{
name: "jason",
age: 44,
},
{
name: "handson",
age: 15,
},
{
name: "andrew",
age: 41,
},
}
sort.Sort(data)
fmt.Println(data)
val := "johnson"
found := false
i := sort.Search(len(data), func(i int) bool {
println(i)
return data[i].name >= val
})
if i < len(data) && data[i].name == val {
found = true
}
fmt.Println(val, found)
return
}
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