arrays - 迭代 Go 字符串以提取特定的子字符串

Question

我开始学习围棋，我想实现一些算法。我想遍历一个字符串，然后提取一些子字符串，例如:p -(40) *(GOT) +(FF)应该返回这样的数组:[p, 40, GOT, FF]

我写了这样的东西，但它含糊不清:

import (
    "strings"

) 

func find(input string){
    var result []string
    a := strings.SplitN(input, "-(", 2);
    result[0] = a[0]
    b := strings.SplitN(a[1], ") *(", 2)
    result[1] = b[0]
    c := strings.SplitN(a[1], ") +(", 2)
    result[2] = c[0]
    d := strings.SplitN(a[1], ")", 2)
    result[3] = d[0]
}

有人可以纠正我或提出更简单的建议吗？谢谢!

Answer 1

您可以使用 strings.FieldsFunc，就像这个工作示例代码:

package main

import "fmt"
import "strings"

func find(input string) []string {
    return strings.FieldsFunc(input, split)
}

func main() {
    strs := find("p -(40) *(GOT) +(FF)")
    str := strings.Replace(fmt.Sprint(strs), " ", ", ", -1)
    fmt.Println(str)
}

func split(r rune) bool {
    return r == ' ' || r == '-' || r == '(' || r == ')' || r == '*' || r == '+'
}

输出:

[p, 40, GOT, FF]

---

您可以使用 strings.Fields 然后使用 strings.Trim，就像这个工作示例代码:

package main

import "fmt"
import "strings"

func main() {
    fmt.Println(find("p -(40) *(GOT) +(FF)"))
}

func find(input string) []string {
    strs := strings.Fields(input)
    result := make([]string, 0, len(strs))

    for _, v := range strs {
        s := strings.Trim(v, "()+-*")
        if len(s) > 0 {
            result = append(result, s)
        }
    }
    return result
}

输出:

[p 40 GOT FF]

---

这也适用于您的特殊情况:

package main

import "fmt"
import "strings"

func main() {
    fmt.Println(find("p -(40) *(GOT) +(FF)"))
}

func find(input string) []string {
    strs := strings.Fields(input)
    for i := 0; i < len(strs); i++ {
        strs[i] = strings.Trim(strs[i], "()+-*")
    }
    return strs
}

输出:

[p 40 GOT FF]

---

如果您需要像这样的字符串输出:[p, 40, GOT, FF]，试试这个有效的示例代码:

package main

import "fmt"
import "strings"

func main() {
    strs := find("p -(40) *(GOT) +(FF)")
    str := strings.Replace(fmt.Sprint(strs), " ", ", ", -1)
    fmt.Println(str)
}

func find(input string) []string {
    strs := strings.Fields(input)
    for i := 0; i < len(strs); i++ {
        strs[i] = strings.Trim(strs[i], "()+-*")
    }
    return strs
}

输出:

[p, 40, GOT, FF]

---