def _len(*args) -> object.Object:
if len(args) != 1:
return evaluator.new_error('wrong number of arguments. got={}, want=1'.format(len(args)))
if type(args[0]) == object.Array:
return object.Integer(len(args[0].elements))
elif type(args[0]) == object.String:
return object.Integer(len(args[0].value))
else:
return evaluator.new_error('argument to `len` not supported, got {}'.format(args[0].type()))
def first(*args: List[object.Object]) -> object.Object:
if len(args) != 1:
return evaluator.new_error('wrong number of arguments. got={}, want=1', len(args))
if args[0].type() != object.ARRAY_OBJ:
return evaluator.new_error('argument to `first` must be ARRAY, got {}'.format(args[0].type()))
arr = args[0]
if len(arr.elements) > 0:
return arr.elements[0]
return evaluator.NULL
def _push(*args):
arguments = args[0]
arg = arguments[0]
if len(arguments) != 2:
return evaluator.new_error(
f"wrong number of arguments. got={len(arguments)}, want=2")
elif not isinstance(arg, Array):
return evaluator.new_error(
f"argument to `push` must be ARRAY, got {arg.object_type()}")
new_array = arg.elements[:]
new_array.append(arguments[1])
return Array(new_array)
def _len(*args):
arguments = args[0]
arg = arguments[0]
if len(arguments) != 1:
return evaluator.new_error(
f"wrong number of arguments. got={len(arguments)}, want=1")
elif isinstance(arg, Array):
return Integer(len(arg.elements))
elif isinstance(arg, String):
return Integer(len(arg.value))
return evaluator.new_error(
f"argument to `len` not supported, got {arg.object_type()}")
def _first(*args):
arguments = args[0]
arg = arguments[0]
if len(arguments) != 1:
return evaluator.new_error(
f"wrong number of arguments. got={len(arguments)}, want=1")
elif not isinstance(arg, Array):
return evaluator.new_error(
f"argument to `first` must be ARRAY, got {arg.object_type()}")
if len(arg.elements) > 0:
return arg.elements[0]
return NULL
def push(*args: List[object.Object]) -> object.Object:
if len(args) != 2:
return evaluator.new_error('wrong number of arguments. got={}, want=2', len(args))
if args[0].type() != object.ARRAY_OBJ:
return evaluator.new_error('argument to `push` must be ARRAY, got {}'.format(args[0].type()))
arr = args[0]
new_elements = copy.deepcopy(arr.elements)
new_elements.append(args[1])
return object.Array(new_elements)
def rest(*args: List[object.Object]) -> object.Object:
if len(args) != 1:
return evaluator.new_error('wrong number of arguments. got={}, want=1', len(args))
if args[0].type() != object.ARRAY_OBJ:
return evaluator.new_error('argument to `rest` must be ARRAY, got {}'.format(args[0].type()))
arr = args[0]
length = len(arr.elements)
if length > 0:
new_elements = copy.deepcopy(arr.elements[1:length])
return object.Array(new_elements)
return evaluator.NULL
def _rest(*args):
arguments = args[0]
arg = arguments[0]
if len(arguments) != 1:
return evaluator.new_error(
f"wrong number of arguments. got={len(arguments)}, want=1")
elif not isinstance(arg, Array):
return evaluator.new_error(
f"argument to `rest` must be ARRAY, got {arg.object_type()}")
length = len(arg.elements)
if length > 0:
new_array = arg.elements[1:]
return Array(new_array)
return NULL