juxtapose()

Create a function that applies multiple functions to the same arguments.

Implementation

Args: *functions: Functions to apply in parallel Returns: A function that returns a list of results from all functions

Example

                            first_char = lambda s: s[0]
last_char = lambda s: s[-1]
both_ends = juxtapose(first_char, last_char)
both_ends("hello")
                        

Expected output: ['h', 'o']

Source Code

                        def juxtapose(*functions: Callable) -> Callable:
    for func in functions:
        _validate_callable(func)
    
    def parallel(*args, **kwargs):
        return [func(*args, **kwargs) for func in functions]
    
    # Set _argcount for compatibility with tests
    parallel._argcount = max((f.__code__.co_argcount for f in functions), default=0) # type: ignore
    parallel.__name__ = f"juxtapose({', '.join(f.__name__ for f in functions)})"
    return parallel
                    