go标准库strings — 字符串操作

Go语言的strings包提供了一些用于操作字符串的函数。这些函数主要包括字符串的比较、查找、替换、分割、前后缀和大小写转换等操作。

以下是一些使用Go标准库strings包的常见操作的示例代码：

1. 字符串比较：

package main
 
import (
    "fmt"
    "strings"
)
 
func main() {
    str1 := "Hello, World!"
    str2 := "Hello, Go!"
 
    if strings.Compare(str1, str2) == 0 {
        fmt.Println("str1 and str2 are equal")
    } else {
        fmt.Println("str1 and str2 are not equal")
    }
}

2. 字符串查找：

package main
 
import (
    "fmt"
    "strings"
)
 
func main() {
    str := "Hello, World!"
    substr := "World"
 
    if strings.Contains(str, substr) {
        fmt.Println("Found substring:", substr)
    } else {
        fmt.Println("Substring not found:", substr)
    }
}

3. 字符串替换：

package main
 
import (
    "fmt"
    "strings"
)
 
func main() {
    str := "Hello, World!"
    oldStr := "World"
    newStr := "Go"
 
    str = strings.Replace(str, oldStr, newStr, -1)
    fmt.Println("Replaced string:", str)
}

4. 字符串分割：

package main
 
import (
    "fmt"
    "strings"
)
 
func main() {
    str := "Hello, World!"
    delimiter := ","
 
    splitted := strings.Split(str, delimiter)
    fmt.Println("Splitted string:", splitted)
}

5. 字符串前后缀检查：

package main
 
import (
    "fmt"
    "strings"
)
 
func main() {
    str := "Hello, World!"
 
    if strings.HasPrefix(str, "Hello") {
        fmt.Println("String has prefix 'Hello'")
    }
 
    if strings.HasSuffix(str, "World!") {
        fmt.Println("String has suffix 'World!'")
    }
}

6. 字符串大小写转换：

package main
 
import (
    "fmt"
    "strings"
)
 
func main() {
    str := "Hello, World!"
 
    lowerStr := strings.ToLower(str)
    fmt.Println("Lowercase string:", lowerStr)
 
    upperStr := strings.ToUpper(str)
    fmt.Println("Uppercase string:", upperStr)
}

7. 字符串去空格：

package main
 
import (
    "fmt"
    "strings"
)
 
func main() {
    str := "  Hello, World!  "
 
    trimmed := strings.TrimSpace(str)
    fmt.Println("Trimmed string:", trimmed)
}

8. 字符串其他操作：

package main
 
import (
    "fmt"
    "strings"
)
 
func main() {
    str := "Hello, World!"
 
    // 获取字符串长度
    length := len(str)
    fmt.Println("Length of string:", length)
 
    // 获取字符串中某个字符的位置
    char := "o"
    index := strings.Index(str, char)
    fmt.Println("Index of character '" + char + "':", index)