London | SDC-Nov-25 | Pezhman Azizi | Sprint 3 | Implement shell tools (cat, ls, wc) In JavaScript With NodeJS

[Pezhman-Azizi]

Learners, PR Template

Self checklist

• I have titled my PR with Region | Cohort | FirstName LastName | Sprint | Assignment Title
• My changes meet the requirements of the task
• I have tested my changes
• My changes follow the style guide

Changelist

This PR adds JavaScript (NodeJS) implementations of the three shell tools required for the sprint: cat, ls, and wc.
Each tool is implemented in its own commit for clarity and easier review.

What's Included

cat.js

• Prints the contents of one or more files
• Supports basic usage and incremental flag handling
• Matches the core behaviour of Unix cat

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ls.js

• Supports -1 (one entry per line)
• Supports -a (show hidden files)
• Uses fs.readdirSync() and simple filtering

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wc.js

• Supports counting lines, words, and bytes
• Implements flags -l, -w, -c
• Supports multiple files and prints a total line
• Uses NodeJS fs for UTF-8 byte counting

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📝 Notes

• All tools behave as required in the sprint instructions
• Each tool lives in its own folder (cat, ls, wc)
• Each tool has its own clean commit for easier code review

[LonMcGregor]

Good start on this sprint's tasks, I have spotted a few areas where you could improve code further

Your way of handling arguments works ok, but can you think of any downsides to managing your arguments by checking each one in the input arguments? Compare this approach which how you handled arguments in the python task. Which is better?

[LonMcGregor]

Is there a reason you only focus on -1 here?

[LonMcGregor]

Good idea to move this to its own function!