Use the path/filepath.Glob function to list the file path list of the specified pattern and return an error message

Title: Use the path/filepath.Glob function to list the file path list of the specified pattern and return the error message

In the Go language, by using the path/filepath package Glob function, we can easily list the file path list of the specified pattern. This article will introduce you in detail how to use the Glob function and show you the corresponding code examples.

GlobThe function is defined as follows:

func Glob(pattern string) (matches []string, err error)

GlobThe function receives a pattern string as a parameter and returns all files matching the pattern or List of directory paths. * and ? can be used as wildcard characters in the pattern string, representing any multiple characters and a single character respectively.

The following is a simple example showing how to use the Glob function to list all file paths ending with .txt in the current directory and return possible error messages :

package main

import (
    "fmt"
    "path/filepath"
)

func main() {
    files, err := filepath.Glob("*.txt")
    if err != nil {
        fmt.Println("Error occurred:", err)
        return
    }

    fmt.Println("Matched files:")
    for _, file := range files {
        fmt.Println(file)
    }
}

In the above example, we get all the files ending with .txt in the current directory by calling the Glob function and specifying the pattern string *.txt File path ending in . If executed successfully, the Glob function will return a string slice files, which contains all matching file paths. If an error occurs, the Glob function will return a non-empty error message.

We then use range to loop through the files slices and print out each successfully matched file path.

The following is a sample output:

Matched files:
file1.txt
file2.txt
file3.txt

In actual applications, you can select different pattern strings as needed to obtain different types of file path lists. For example, you can use other functions provided by the path/filepath package, such as Dir and Walk, to further customize the filtering logic of your file path list.

Summary:

This article details how to use the Glob function of the path/filepath package in the Go language to list files in a specified pattern. A list of paths and possible error messages returned. By using the Glob function, you can quickly and easily obtain file paths that meet specific patterns and adapt to different file operation needs. I wish you can use the Glob function easily and happily in your daily development!

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