#!env zsh

rb() {
cat<<EOF

def fib pred
  a = 0
  b = 1
  while pred.call(a)
    yield a
    a, b = b, (a + b)
  end
end

fib lambda { |x| x < 100 } do |x|
  puts x
end

EOF
}

ruby <(rb)

py() {
cat<<EOF

def fib():
  a = 0
  b = 1
  while True:
    yield a
    a, b = b, a + b

for x in fib():
  if x >= 100:
    break
  print x

EOF
}

python <(py)