Any and All in Lua

gistfile1.lua

-- Return true if any element of the iterable is true (or false if the iterable
-- is empty). Note that all values other than nil and false are considered true.
--
-- ... - any number of values
--
-- Examples
--
--   any(false, false, true) -- true
--   any(false, false, false) -- false
--   any(true, true, true) -- true
function any(...)
  local args = { ... }
  for _, v in pairs(args) do
    if v then
      return true
    end
  end
  return false
end

-- Return true if all elements of the iterable are true (or true if the iterable
-- is empty). Note that all values other than nil and false are considered true.
--
-- ... - any number of values
--
-- Examples
--
--   all(false, false, true) -- false
--   all(false, false, false) -- false
--   all(true, true, true) -- true
function all(...)
  local args = { ... }
  for _, v in pairs(args) do
    if not v then
      return false
    end
  end
  return true
end

print(any(false, false, true)) -- true
print(any(false, false, false)) -- false
print(any(true, true, true)) -- true

print(all(false, false, true)) -- false
print(all(false, false, false)) -- false
print(all(true, true, true)) -- true