programming-challenges/challenges/camel-case/solutions/javascript/function/solution.js

import readline from 'node:readline'

const input = []
const readlineInterface = readline.createInterface({
  input: process.stdin,
  output: process.stdout
})
readlineInterface.on('line', (value) => {
  input.push(value)
})
readlineInterface.on('close', solution)

function solution() {
  const string = input[0]
  const output = string
    .trim()
    .split(' ')
    .map((word, index) => {
      const isFirstElement = index === 0
      if (isFirstElement) {
        return word
      }
      return word[0].toUpperCase() + word.slice(1)
    })
    .join('')
  console.log(output)
}