When working with directories in Julia, there are multiple ways to list all subdirectories of a parent directory. In this article, we will explore three different approaches to solve this problem.
Option 1: Using the readdir function
The readdir function in Julia returns an array of all files and directories in a given path. By iterating over the array and checking if each entry is a directory, we can list all subdirectories of a parent directory.
function listSubdirectories(parentDir)
subdirectories = []
entries = readdir(parentDir)
for entry in entries
if isdir(joinpath(parentDir, entry))
push!(subdirectories, entry)
end
end
return subdirectories
end
To use this function, simply pass the parent directory path as an argument:
parentDir = "/path/to/parent/directory"
subdirectories = listSubdirectories(parentDir)
println(subdirectories)
Option 2: Using the walkdir function
The walkdir function in Julia recursively traverses a directory tree and returns an iterator over all files and directories. By filtering the iterator to only include directories, we can list all subdirectories of a parent directory.
function listSubdirectories(parentDir)
subdirectories = []
for entry in walkdir(parentDir)
if isdir(entry)
push!(subdirectories, entry)
end
end
return subdirectories
end
Similar to option 1, you can use this function by passing the parent directory path as an argument:
parentDir = "/path/to/parent/directory"
subdirectories = listSubdirectories(parentDir)
println(subdirectories)
Option 3: Using the Glob.jl package
The Glob.jl package provides a convenient way to search for files and directories using glob patterns. By specifying the parent directory path and the glob pattern for directories, we can list all subdirectories of a parent directory.
First, make sure you have the Glob.jl package installed by running the following command:
using Pkg
Pkg.add("Glob")
Once the package is installed, you can use the following code to list all subdirectories:
using Glob
parentDir = "/path/to/parent/directory"
subdirectories = glob("*/", parentDir)
println(subdirectories)
After exploring these three options, it is clear that using the Glob.jl package provides a more concise and efficient solution. It simplifies the code and eliminates the need for manual iteration or recursion. Therefore, option 3 is the recommended approach to list all subdirectories of a parent directory in Julia.