magic test

const lines = [
  [8, 3, 4],
  [1, 5, 9],
  [6, 7, 2]
]
const columns = [
  [8, 1, 6],
  [3, 5, 7],
  [4, 9, 2]
]
// diagonal
const cross = [
  [8, 5, 2],
  [6, 5, 4]
]
// junta os 3 acima na mesma array
const tests = lines.concat(columns).concat(cross)
let fail = false
const base = tests[0].reduce(sum)
for (let test of tests) {
  // some os numeros da array e verifica se é igual ao da base
  if (test.reduce((part, number) => part + number) !== base) {
    fail = true
    break
  }
}
if (!fail) {
  console.log('A FUCKING MAGIC CUBE')
}

function sum (part, number) {
  return part + number
}