Go语言中实现正则表达式大小写不敏感匹配

import (
    "fmt"
    "regexp"
    "strings"
)

func main() {
    sName := "North by Northwest"
    // 原始的替换逻辑，但缺乏大小写不敏感
    pattern := strings.Replace(sName, " ", "[ \._-]", -1)
    fmt.Printf("原始模式: %s
", pattern)
    // 期望匹配 "north by northwest", "NORTH_BY_NORTHWEST" 等
}

package main

import (
    "fmt"
    "regexp"
    "strings"
)

func main() {
    sName := "North by Northwest"
    // 将空格替换为匹配多种分隔符的模式
    basePattern := strings.Replace(sName, " ", "[ \._-]", -1)

    // 在模式前添加 (?i) 标志以实现大小写不敏感
    caseInsensitivePattern := "(?i)" + basePattern

    reg, err := regexp.Compile(caseInsensitivePattern)
    if err != nil {
        fmt.Printf("正则表达式编译错误: %v
", err)
        return
    }

    testStrings := []string{
        "North by Northwest",
        "north by northwest",
        "NORTH_BY_NORTHWEST",
        "NoRtH-By-NoRtHwEsT",
        "South East", // 不匹配
    }

    fmt.Printf("使用的正则表达式: %s
", caseInsensitivePattern)
    for _, s := range testStrings {
        if reg.MatchString(s) {
            fmt.Printf("'%s' 匹配成功
", s)
        } else {
            fmt.Printf("'%s' 匹配失败
", s)
        }
    }
}

package main

import (
    "fmt"
    "regexp"
)

func main() {
    // 创建一个大小写不敏感的正则表达式
    r := regexp.MustCompile(`(?i)CaSe`)

    testStrings := []string{
        "Case",
        "case",
        "CASE",
        "CaSe",
        "CASES", // 包含但不是完全匹配
        "notcase", // 不匹配
    }

    fmt.Printf("使用的正则表达式: %s
", r.String())
    for _, s := range testStrings {
        if r.MatchString(s) {
            fmt.Printf("'%s' 匹配成功
", s)
        } else {
            fmt.Printf("'%s' 匹配失败
", s)
        }
    }
}