Given list of strings. The task is to find the frequency of the elements which are common in all strings given in the list of strings.
Examples:
Input : test_list = ["gegek", "gfgk", "kingg"]
Output : {'g': 2, 'k': 1}
Explanation : g occurs twice in all Strings.
Input : test_list = ["gefgek", "gfgk", "kinfgg"]
Output : {'g': 2, 'k': 1, 'f' : 1}
Explanation : f occurs once in all Strings.Method : Using reduce() + lamdba + Counter()
The combination of above functions can be used to solve this problem. In this, we perform the key role of counting using Counter() and lambda coupled with reduce() is used to perform intersection and extension of logic to all the strings respectively.
Python3
# Python3 code to demonstrate working of# Strings list intersection# Using reduce() + lamdba + Counter()from functools import reducefrom collections import Counter # initializing listtest_list = ["geek", "gfgk", "king"] # printing original listprint("The original list is : " + str(test_list)) # using & operator to perform intersectionres = reduce(lambda a, b: a & b, (Counter(ele) for ele in test_list[1:]), Counter(test_list[0])) # printing resultprint("String intersection and frequency : " + str(dict(res))) |
The original list is : ['geek', 'gfgk', 'king']
String intersection and frequency : {'g': 1, 'k': 1}
Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.
To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course. And to begin with your Machine Learning Journey, join the Machine Learning – Basic Level Course
