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Python: Count the even, odd numbers in a given array of integers using Lambda

Python Lambda: Exercise-13 with Solution

Write a Python program to count the even, odd numbers in a given array of integers using Lambda.

Sample Solution:

Python Code :

array_nums = [1, 2, 3, 5, 7, 8, 9, 10]
print("Original arrays:")
print(array_nums)
odd_ctr = len(list(filter(lambda x: (x%2 != 0) , array_nums)))
even_ctr = len(list(filter(lambda x: (x%2 == 0) , array_nums)))
print("\nNumber of even numbers in the above array: ", even_ctr)
print("\nNumber of odd numbers in the above array: ", odd_ctr)

Sample Output:

Original arrays:
[1, 2, 3, 5, 7, 8, 9, 10]

Number of even numbers in the above array:  3

Number of odd numbers in the above array:  5

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Python: Tips of the Day

Returns a list of elements that exist in both lists, after applying the provided function to each list element of both.

Example:

def tips_intersection_by(a, b, fn):
  _b = set(map(fn, b))
  return [item for item in a if fn(item) in _b]

from math import floor
print(tips_intersection_by([2.1, 1.2], [2.3, 3.4],floor))

Output:

[2.1]