functional python - from hackernoon.com, lean functional python in 10 min, Python

functional python - from hackernoon.com, lean functional python in 10 min

#python 2.7.12

# https://hackernoon.com/learn-functional-python-in-10-minutes-to-2d1651dece6f

# map

x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

def sqr(n): return n * n

print list(map(sqr, x))

## lambda - square = lambda num: num * num

## print square(2)

print list(map(lambda num: num * num, x))
print

# reduce

product = 1

y = [1, 2, 3, 4]

for num in y: product = product * num
    
print product

from functools import reduce

product = reduce( (lambda a, b: a * b), [1, 2, 3, 4] )

print product
print

# filter

r = range(-5, 5)

new_list = []

for num in r:
    if num < 0: new_list.append(num)
        
print new_list

x = range(-5, 5)
all_less_than_zero = list(filter(lambda num: num < 0, x))
print all_less_than_zero
print

#hof

def summation(n): return sum(n)
def action(func, numbers): return func(numbers)
print(action(summation, [1, 2, 3]))
print

'''
def brandon(): return "brandon"
def john() : return "john"
def person():
    age = int(input("What's your age?"))
    
    if age == 21: return brandon()
    else: return john()
    
result = person() '''


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