Q:

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

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mahmoud2506
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2022-05-23
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Given two arrays (array1 and array2), we have to find their intersection.

Example:

Input: 
array1[] = [11, 10, 22, 20, 35, 67]
array2[] = [22, 30, 35, 11]

Output:
Intersection: [22, 35, 11]

 

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mahmoud2506
2022-05-23
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Python code to find intersection of two arrays using Lambda expression and filter() function

In the below code, to find the intersection of two arrays – we are using lambda expression and filter() function.

The filter() function is a built-in function that is used to filter the given sequence (sets, lists, tuples, etc.) with the help of a function that checks each element in the given sequence to be true or not. And, the lambda function is an anonymous function - that means the function which does not have any name.

# Function: ArrayIntersection
# the function will accept two arrays
# and, will find the intersection

def ArrayIntersection(a1, a2):
     # Here, the lambda expression will filter
     # the element e list a2 where e
     # also exists in a1
     result = list(filter(lambda x: x in a1, a2)) 
     print ("Intersection : ",result)
  
# Main function
if __name__ == "__main__":
    # Two arrays 
    array1 = [11, 10, 22, 20, 35, 67]
    array2 = [22, 30, 35, 11]
    
    # function call to find intersection
    ArrayIntersection(array1, array2)

Output:

Intersection :  [22, 35, 11]

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