NodeJS Program to Read JSON Config with Explanation
NodeJS
Medium
File System & Paths
34 views
1 min read
82 words
This problem helps you practice core NodeJS fundamentals in a practical way. It builds intuition around json, config, read. Let’s break it down step by step so you can implement it confidently.
Problem Statement
Read config.json and print config.site or 'meetcode'.
Input Format
No input.
Output Format
Print one word.
Constraints
If file missing or invalid JSON, fallback.
Code Solution
This explanation is written for learning purposes and to help beginners understand the concept clearly.
const fs = require('fs');
let site = 'meetcode';
try {
const txt = fs.readFileSync('config.json', 'utf8');
const obj = JSON.parse(txt);
if (obj && typeof obj.site === 'string' && obj.site.trim()) site = obj.site.trim();
} catch (e) {}
console.log(site);
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
Read config.json and print config.site or 'meetcode'.
Input / Output
Constraints
If file missing or invalid JSON, fallback.
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 fs = require('fs');
let site = 'meetcode';
try {
const txt = fs.readFileSync('config.json', 'utf8');
const obj = JSON.parse(txt);
if (obj && typeof obj.site === 'string' && obj.site.trim()) site = obj.site.trim();
} catch (e) {}
console.log(site);
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