Step by Step solution about How to resolve the algorithm Walk a directory/Non-recursively step by step in the Mathematica/Wolfram Language programming language

Source Code Overview:

The provided Wolfram code snippet uses the FileNames function to retrieve a list of file paths in the current directory or a specified directory.

Line-by-Line Explanation:

Line 1:

FileNames["*"]

This line uses the FileNames function to retrieve a list of all the files in the current directory. The asterisk wildcard (*) matches any file name. The result is a list of file paths.

Line 2:

FileNames["*.png", $RootDirectory]

This line uses the FileNames function again, but this time it specifies a filter of "*.png". This means that it will only retrieve files with the ".png" extension. Additionally, it specifies the $RootDirectory as the directory to search in. This is assumed to be the root directory of your current project.

Expected Output:

Line 1: The output will be a list of all the file paths in the current directory.

Line 2: The output will be a list of all the file paths of files with the ".png" extension in the $RootDirectory.

Additional Notes:

• The FileNames function can take multiple wildcards to specify more complex matching criteria.
• The $RootDirectory variable is a special variable in Wolfram that represents the root directory of your current project.
• The results of the FileNames function can be used for further processing, such as opening and reading the files or performing operations on them.

FileNames["*"]
FileNames["*.png", $RootDirectory]