Merge pull request #179 from 30-seconds/parity-outliers

Add find_parity_outliers

snippets/find_parity_outliers.md

@@ -0,0 +1,23 @@
+---
+title: find_parity_outliers
+tags: list,math,intermediate
+---
+
+Given a list, returns the items that are parity outliers.
+
+Use `collections.Counter` with a list comprehension to count even and odd values in the list, use `collections.Counter.most_common()` to get the most common parity.
+Use a list comprehension to find all elements that do not match the most common parity.
+
+```py
+from collections import Counter
+
+def find_parity_outliers(nums):
+  return [
+    x for x in nums
+    if x % 2 != Counter([n % 2 for n in nums]).most_common()[0][0]
+  ]
+```
+
+```py
+find_parity_outliers([1, 2, 3, 4, 6]) # [1, 3]
+```