words-counter-app/index.js

A CLI tool to count words in a text file

#!/usr/bin/env node

import fs from 'node:fs/promises'

const filePath = process.argv[2]
const specificWord = process.argv[3]
const fileData = await fs.readFile(filePath,'utf-8')
const wordsArray = fileData.split(/[\W]/).filter(w=>w)
const wordObj = {}

for(const word of wordsArray){
     wordObj[word]=(wordObj[word] || 0) + 1
}

if(specificWord){
    const newObj = {[specificWord]:wordObj[specificWord]??0}
    console.log(newObj)
}else{
    console.log(wordObj)
}