fib

Vanity one liners.

• Fibonacci in position number
• String sequence of fib nums up to a certain number
• Sum of fib up to a certain number

Javascript one liners

// fib in postion
const fib = (pos, a=0, b=1) => pos ? fib(pos-1, b, a+b) : a

// String of fibs less or equal to num
const fibs = (num, a=0, b=1) => num >= b ? `${a}, ` + fibs(num, b, a+b) : a

// Sum of fibs less or equal to num
const fibSum = (num, a=0, b=1) => num >= b ? a + fibSum(num, b, a+b) : a

Python two liners

# fib in postion
def fib(pos, a=0, b=1):
  return fib(pos-1, b, a+b) if pos else a
  
# String of fibs less or equal to num
def fibs(num, a=0, b=1):
  return f"{a} " + str(fibs(num, b, a+b)) if num >= b else a

# Sum of fibs less or equal to num
def fib_sum(num, a=0, b=1):
  return a + fib_sum(num, b, a+b) if num >= b else a