Vibescript Showcase

Big integers

Calculate factorials, Fibonacci numbers, and powers larger than 64 bits.

Showcase

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Sourceshowcase/numbers/big_integers.vibe
type RunResult = {
  factorial_50: int,
  factorial_50_digits: int,
  fibonacci_300: int,
  json_stays_exact: bool,
  still_an_int: bool,
  two_to_the_256: int
}

def factorial(n: int) -> int
  (1..n).to_a.reduce(1) { |product, value| product * value }
end

def fibonacci(count: int) -> int
  previous = 0
  current = 1
  count.times {
    previous, current = current, previous + current
  }
  previous
end

def exact_json_round_trip?(value: int) -> bool
  JSON.parse(JSON.stringify(value)) == value
end

def run -> RunResult
  huge = factorial(50)

  {
    factorial_50: huge,
    factorial_50_digits: huge.to_s.length,
    two_to_the_256: 2 ** 256,
    fibonacci_300: fibonacci(300),
    json_stays_exact: exact_json_round_trip?(huge),
    still_an_int: huge.is_type?(:int)
  }
end

Output

Click Run example to see the result.

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