What common functions does Go language support?

Go language is an open source programming language developed by Google and widely used in the fields of cloud computing and big data. It supports a rich standard library and provides many common functions to help developers write efficient and reliable code. In this article, we will explore some common functions supported by the Go language and provide specific code examples.

1. String processing functions

The Go language provides a wealth of string processing functions to help developers perform various operations on strings, such as splicing, splitting, replacing, searching, etc. The following are some common string processing functions and their code examples:

package main

import (
    "fmt"
    "strings"
)

func main() {
    str := "Hello, World!"

    // 拼接字符串
    fmt.Println(strings.Join([]string{"Hello", "World"}, ", "))

    // 分割字符串
    splitStr := strings.Split(str, ",")
    fmt.Println(splitStr)

    // 替换字符串
    newStr := strings.Replace(str, "World", "Go", 1)
    fmt.Println(newStr)

    // 查找子串
    index := strings.Index(str, "World")
    fmt.Println(index)
}

2. Mathematical functions

Go language provides a wealth of mathematical functions for processing mathematical operations, rounding, rounding, etc. Remainder, power operations, etc. The following are some common mathematical functions and their code examples:

package main

import (
    "fmt"
    "math"
)

func main() {
    num := 3.14

    // 向上取整
    ceil := math.Ceil(num)
    fmt.Println(ceil)

    // 向下取整
    floor := math.Floor(num)
    fmt.Println(floor)

    // 取平方根
    sqrt := math.Sqrt(num)
    fmt.Println(sqrt)

    // 求幂
    pow := math.Pow(num, 2)
    fmt.Println(pow)
}

3. Time function

Go language provides a wealth of time functions for obtaining the current time, formatting output time, and calculating Time difference etc. The following are some common time functions and their code examples:

package main

import (
    "fmt"
    "time"
)

func main() {
    // 获取当前时间
    now := time.Now()
    fmt.Println(now)

    // 格式化输出时间
    fmt.Println(now.Format("2006-01-02 15:04:05"))

    // 计算时间差
    oneYearAgo := now.AddDate(-1, 0, 0)
    diff := now.Sub(oneYearAgo)
    fmt.Println(diff.Hours())
}

Conclusion

Through the above examples, we can see that the Go language provides a wealth of common functions for string processing and mathematical operations. and time operations. The use of these functions allows developers to write code more efficiently, while also improving the readability and maintainability of the code. I hope this article will help you understand the common functions of Go language.

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