Intersection of two arrays in Python ( Lambda expression and filter function )

Given two arrays, find their intersection.


Input:  arr1[] = [1, 3, 4, 5, 7]
        arr2[] = [2, 3, 5, 6]
Output: Intersection : [3, 5]

We have existing solution for this problem please refer Intersection of two arrays link. We will solve this problem quickly in python using Lambda expression and filter() function.





# Function to find intersection of two arrays
def interSection(arr1,arr2):
     # filter(lambda x: x in arr1, arr2)  -->
     # filter element x from list arr2 where x
     # also lies in arr1
     result = list(filter(lambda x: x in arr1, arr2)) 
     print ("Intersection : ",result)
# Driver program
if __name__ == "__main__":
    arr1 = [1, 3, 4, 5, 7]
    arr2 = [2, 3, 5, 6]



Intersection : [3, 5]

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