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These are the projects for the JavaScript Level 2 module in Learn JS the Hard Way.
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js-level-2-projects/03-replicate-ls
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Zed A. Shaw 8cd18c6f8c
More explanation of all the projects in the README files. 		3 years ago
..
README.md More explanation of all the projects in the README files. 3 years ago
package-lock.json First step that lays out a basic command line UI with a simple glob for a first ls copy. 3 years ago
package.json First step that lays out a basic command line UI with a simple glob for a first ls copy. 3 years ago
step1.js Update the README. 3 years ago

README.md

Replicate ls

This starts you off with a simple command line parsing library and a globbing library to get going named fast-glob. "Globbing" is what you're doing when you use regular expression patterns to match files like this:

ls *.txt

The fast-glob library is a good library with only one quirk to watch out for: It will not convert \ (backslash) characters to / in your glob. That means if you use C:\Users\zed\*.txt it will fail. You'll have to convert all \ to / on Windows.

File Attributes

Part of the ls command is printing out the attributes of a file. For that you'll need fs.stat found in the fs module.

Removing fast-glob

If you can get your ls copy working with fast-glob then try removing fast-glob and replicate its functionality with your own code. You'll need the fs module and specifically the readdir function.

Learning Objectives

As with all of the exercises thus far you aren't just learning how to replicated ls but you'll also:

  1. Learn more about the fs module.
  2. Learn how to process command line options. Try commander.
  3. Learn how to list files recursively based on a pattern using fast-glob and how fast-glob works by replacing it.
  4. Learn about file attributes with the fs.stat function.