wcount-cli/app.js

#!/usr/bin/env node
import { readFile } from 'node:fs/promises'
const filePath = process.argv[2]
const specificWord = process.argv[3]

let wordCount = {}

async function readContent() {
    try {
        const fileData = await readFile(filePath, 'utf-8')
        const words = fileData
            .split(/[\W]/)
            .filter((w) => w)
            .map((word) => word.toLowerCase())

        words.forEach((word) => {
            wordCount[word] = (wordCount[word] || 0) + 1
        })

        console.log(wordCount)

        if (specificWord) {
            console.log(`Count of "${specificWord}": ${wordCount[specificWord.toLowerCase()] || 0}`)
        }

    } catch (err) {
        if (err.code === 'ENOENT') {
            console.error(`❌ File not found: ${filePath}`)
        }
    }
}

await readContent()