Advent of Code 2018, Day 5, Part 1

index.ts

import * as fs from 'fs'

const contents = fs.readFileSync('input', 'utf8')

const valuesReact = (x: string) => (y: string) => {
  const del = Math.abs((x.charCodeAt(0) - y.charCodeAt(0)))
  return del === 32
}

const fin = contents.split('').reduce((acc, curr) => {

  // Check if current value last char in acc annihilate
  if(valuesReact(acc.slice(-1))(curr)) {
    return acc.substring(0, (acc.length - 1))
  }

  return acc.concat(curr)

}, '')

// Drop carriage return
console.log(fin.length - 1)
console.log('^^^ fin length')