from functools import *

xs = [1,2,3,4,5]

# print(sum(xs))
print(reduce(lambda acc,x: acc+x,xs,0))

15

print(reduce(lambda acc,x: acc*x,xs,1))

120

xs = ["john","alice","sam"]

# find longest string
longest = ""
for x in xs:
    if len(x) > len(longest):
        longest = x
print(longest)

print(reduce(lambda longest,x: x if len(x) > len(longest) else longest,xs,""))

alice
alice

# wordValue("abacus") = 1+2+1+3+21+19 = 47
# wordValue("attitude") = 100
ss = "attitude"
print(reduce(lambda acc,x: acc + ord(x) - ord('a') + 1,ss,0))

100

ord('a')

97

# frequencies("mississippi") = {'m':1, 'i':4, 's':4, 'p':2}
ss = "mississippi"
print(reduce(lambda acc,x: acc | {x:1+acc[x]} if x in acc else acc | {x:1},ss,{}))

{'m': 1, 'i': 4, 's': 4, 'p': 2}

set([1,2,3]) | set([3,4,5])

{1, 2, 3, 4, 5}

set([1,2,3]).union(set([3,4,5]))

{1, 2, 3, 4, 5}

import math
xs = [20,12,-46,3,5]
#minmax(xs) = (3,46)
#print(reduce(lambda acc,x: (min(acc[0],x),max(acc[1],x)),xs,(math.inf,-math.inf)))
#print(reduce(lambda acc,x: (min(acc[0],x),max(acc[1],x)),xs))
print(reduce(lambda acc,x: (x if x < acc[0] else acc[0], x if x > acc[1] else acc[1]),xs,(math.inf,-math.inf)))

(-46, 20)