Coverage for src / pyfplib / functions.py: 21%

1from typing import Any, Callable, Iterable, Sequence, Union 

2 

3from pyfplib.option import Nothing, Option, Some 

4 

5 

6def for_each(callback: Callable[[Any], None], iterable: Iterable[Any]): 

7 """Applies the given callback for each elements of the given iterable object 

8 

9 Args: 

10 callback: callback to execute with elements 

11 iterable: provides elements to apply the callback 

12 """ 

13 for item in iterable: 

14 callback(item) 

15 

16 

17def any_of(callback: Callable[[Any], bool], iterable: Iterable[Any]) -> bool: 

18 ret_value = False 

19 for item in iterable: 

20 ret_value = callback(item) 

21 if ret_value: 

22 break 

23 return ret_value 

24 

25 

26def all_of(callback: Callable[[Any], bool], iterable: Iterable[Any]) -> bool: 

27 ret_value = True 

28 for item in iterable: 

29 ret_value = callback(item) 

30 if not ret_value: 

31 break 

32 return ret_value 

33 

34 

35def none_of(callback: Callable[[Any], bool], iterable: Iterable[Any]) -> bool: 

36 ret_value = True 

37 for item in iterable: 

38 ret_value = not callback(item) 

39 if not ret_value: 

40 break 

41 return ret_value 

42 

43 

44def fold( 

45 callback: Callable[[Any, Any], Any], 

46 iterable: Iterable[Any], 

47 first: Union[Any, None] = None, 

48) -> Any: 

49 ret_value = first 

50 for item in iterable: 

51 ret_value = callback(ret_value, item) 

52 return ret_value 

53 

54 

55def head(iterable: Iterable[Any]) -> Option[Any]: 

56 return Some(iterable[0]) if len(iterable) else Nothing() 

57 

58 

59def tail(sequence: Sequence[str]) -> Sequence[str]: 

60 return sequence[1:] if len(sequence) else sequence 

61 

62 

63def last(iterable: Iterable[Any]) -> Option[Any]: 

64 return Nothing() if len(iterable) == 0 else Some(iterable[-1]) 

65 

66 

67def is_empty(iterable: Iterable[Any]) -> bool: 

68 return len(iterable) == 0 

69 

70 

71def is_not_empty(iterable: Iterable[Any]) -> bool: 

72 return len(iterable) != 0