How to implement string end character verification in Golang

Title: How to implement character verification at the end of string in Golang

In Golang, we often need to perform various operations and verification on strings, one of which is Verify if a string ends with a specific character. In this article, we will introduce how to use Golang to implement verification of the end of string characters and provide specific code examples.

First, let us take a look at the common implementation methods of string end character verification in Golang:

Method 1: Use the HasSuffix function in the strings package

In Golang The strings package provides a function named HasSuffix, which is used to determine whether a string ends with a specified suffix. The method of using this function is as follows:

package main

import (
    "fmt"
    "strings"
)

func main() {
    str := "hello world"
    suffix := "world"

    if strings.HasSuffix(str, suffix) {
        fmt.Println("字符串以", suffix, "结尾")
    } else {
        fmt.Println("字符串不以", suffix, "结尾")
    }
}

In the above code, we first define a string str as "hello world", and then use the HasSuffix function to determine Whether the string ends with "world" and output the corresponding result.

Method 2: Manually implement string end character verification

In addition to using the functions in the strings package, we can also manually implement string end character verification. The following is a sample code for manual implementation:

package main

import "fmt"

func HasSuffix(str, suffix string) bool {
    if len(str) < len(suffix) {
        return false
    }

    startIndex := len(str) - len(suffix)
    return str[startIndex:] == suffix
}

func main() {
    str := "hello world"
    suffix := "world"

    if HasSuffix(str, suffix) {
        fmt.Println("字符串以", suffix, "结尾")
    } else {
        fmt.Println("字符串不以", suffix, "结尾")
    }
}

In the above code, we define a function named HasSuffix to manually implement the verification of the end of string character. This function will Compares whether the suffix part of the string is equal to the specified suffix to determine whether the string ends with a specific character.

Through the implementation of the above two methods, we can easily verify whether the string in Golang ends with a specific character. Depending on the actual situation, choose to use the functions in the strings package or implement the functions yourself to meet the verification requirements.

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