NodeJS Program to Subcommand Switch with Explanation
NodeJS
Medium
CLI Tools & Debugging
27 views
1 min read
77 words
This problem helps you practice core NodeJS fundamentals in a practical way. It builds intuition around subcommand, switch, support. Let’s break it down step by step so you can implement it confidently.
Problem Statement
Support subcommands: init and run, print what was chosen.
Input Format
No input.
Output Format
Print one line.
Constraints
Use process.argv[2].
Code Solution
This explanation is written for learning purposes and to help beginners understand the concept clearly.
const cmd = process.argv[2] || 'run';
if (cmd === 'init') console.log('init meetcode');
else if (cmd === 'run') console.log('run meetcode');
else console.log('unknown');
Output Example
No sample I/O is provided for this question.
Common Mistakes
- Misreading input/output format.
- Not handling constraints and edge cases.
- Off-by-one errors in loops.
- Forgetting to reset variables between test cases (if any).
Solution Guide
Problem
Support subcommands: init and run, print what was chosen.
Input / Output
Constraints
Use process.argv[2].
Details
Common Mistakes
- Misreading input/output format.
- Not handling constraints and edge cases.
- Off-by-one errors in loops.
- Forgetting to reset variables between test cases (if any).
Official Solution
const cmd = process.argv[2] || 'run';
if (cmd === 'init') console.log('init meetcode');
else if (cmd === 'run') console.log('run meetcode');
else console.log('unknown');
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