【每日一题20220610】链式计算

兴趣爱好交流 每日一题
1

:mage:‍ 给定一个初始数字和一个函数对象列表，我们的任务就是，将初始值依次传入函数中，后续的函数输入正是前面函数的输出。请编写一个函数，计算出最终的结果值。

【示例】

def add10(x): return x + 10
def mul30(x): return x * 30

输入：50, [add10, mul30]
输出：1800
解释：首先将50传入add10函数，50+10=60；再将60传入mul30函数，得到30*60=1800。

题目难度：简单
题目来源：codewars-Chain me

def solution(n, funcs: list)-> int:
    # your code here

assert solution(50, [add10, mul30]) == 1800
assert solution(50, [mul30]) == 1500
assert solution(42, []) == 42
2 
def add10(x): return x + 10
def mul30(x): return x * 30


def solution(n, funcs: list) -> int:
    # your code here
    if (l := len(funcs)) > 0:
        return funcs[l-1](solution(n, funcs[:l-1]))
    else:
        return n


assert solution(50, [add10, mul30]) == 1800
assert solution(50, [mul30]) == 1500
assert solution(42, []) == 42
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3 
def solution(n, funcs: list)-> int:
    if funcs is None:
        return n
    for i in funcs:
        n = i(n)
    return n

assert solution(50, [add10, mul30]) == 1800
assert solution(50, [mul30]) == 1500
assert solution(42, []) == 42
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4 
def solution(n, funcs: list) -> int:
    if len(funcs):
        for fun in funcs:
            n = fun(n)
        return n
    return n

assert solution(50, [add10, mul30]) == 1800
assert solution(50, [mul30]) == 1500
assert solution(42, ) == 42

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5

image

6 
def solution(n, funcs: list)-> int:
    for func in funcs:
        n=func (n)
    return n
7 
def solution(n, funcs: list)-> int:
    if funcs==[]:
        return n
    for i in funcs:
        n=i(n)
    return n
8 
def add10(x): return x + 10
def mul30(x): return x * 30


def solution(n, funcs: list) -> int:
    # your code here
    for i in funcs:
        n = i(n)
    return n


assert solution(50, [add10, mul30]) == 1800
assert solution(50, [mul30]) == 1500
assert solution(42, []) == 42
9 
def add10(x):
    return x + 10

def mul30(x):
    return x * 30

def solution(n, funcs: list) -> int:
    for func in funcs:
        n = func(n)
    return n

assert solution(50, [add10, mul30]) == 1800
assert solution(50, [mul30]) == 1500
assert solution(42, []) == 42