42. 람다와 map·filter·sorted의 key

1words = ["plum", "fig", "banana", "kiwi", "mini"]
2lens = list(map(lambda w: len(w), words))
3print(lens)
4short = list(filter(lambda w: len(w) <= 4, words))
5print(short)
6by_len = sorted(words, key=len, reverse=True)
7print(by_len)
8by_key = sorted(words, key=lambda w: (len(w), w[-1]))
9print(by_key)
10f = lambda x, y=3: x * y + 1
11print(f(2), f(2, 5))
12nums = [5, 2, 8, 1]
13total = 0
14for v in map(lambda n: n * n, nums):
15    if v % 2 == 0:
16        total += v
17print(total)
18print(sorted(nums)[-2], nums)